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"Penelitian mengenai pengaruh air laut tercemar hidrokarbon terhadap kepadatan sel mikroalga Scenedesmus vacuolatus telah dilakukan. Pencemaran hidrokarbon yang berasal dari minyak di laut dapat menghambat proses fotosintesis mikroalga. Hal tersebut dapat berdampak pada kepadatan sel mikroalga. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi air laut tercemar hidrokarbon terhadap kepadatan sel mikroalga Scenedesmus vacuolatus, serta mengetahui perlakuan yang optimum untuk menurunkan kadar total petroleum hidrokarbon (TPH). Pengambilan sampel air laut tercemar hidrokarbon dilakukan di pelabuhan Kali Adem, Jakarta. Perlakuan dalam penelitian adalah medium Walne dengan penambahan air laut tercemar hidrokarbon 25% (A), medium Walne dengan penambahan air laut tercemar hidrokarbon 50% (B), medium Walne dengan penambahan air laut tercemar hidrokarbon 75% (C), dan medium Walne dengan penambahan air laut tercemar hidrokarbon 100% (D). Kontrol yang digunakan adalah medium Walne dengan air laut steril yang bukan berasal dari pelabuhan Kali Adem. Hasil penelitian menunjukkan rata-rata kepadatan sel Scenedesmus vacuolatus tertinggi yaitu pada perlakuan kontrol. Hal tersebut dapat dilihat dari hasil rata-rata kepadatan sel pada masa puncak sebesar 29,48 x 105 sel/mL, serta panjang fase log dari Scenedesmus vacuolatus. Hasil pengukuran kadar TPH menunjukkan terdapat penurunan TPH pada seluruh perlakuan. Perlakuan optimum untuk menurunkan kadar TPH yaitu perlakuan B dengan persen penurunan sebesar 70,62%.(

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)Study about the effect of hydrocarbon-polluted seawater on the cell density of microalgae Scenedesmus vacuolatus has been done. Hydrocarbon pollution derived from oil in the sea can inhibit photosynthesis process of microalgaes. This might impact the density of microalgae cells. The purposes of this study are to determine the effect of the concentration of hydrocarbon-polluted seawater on the density of Scenedesmus vacuolatus microalgae cells and to determine the optimum treatment to reduce total petroleum hydrocarbons (TPH) levels. Sampling of hydrocarbon-polluted seawater was taken at Kali Adem port, Jakarta. The treatment done in this research used Walne medium with the addition of 25% hydrocarbon-polluted seawater (A), 50% (B), 75% (C), and 100% (D). Control is Walne medium with sterile seawater that was not from

the Kali Adem port. The results showed the highest average density of Scenedesmus vacuolatus cells was in the control sample. This can be seen from the results of the average cell density at peak time of 29.48 x 105 cells / mL, as well as the log phase length of Scenedesmus vacuolatus. Measurement of TPH levels showed decreases of TPH in all treatments. The optimum treatment to reduce TPH levels is on treatment Bwith reduction percentage of 70.62%."

"Perhitungan jumlah sel mikro alga secara lebih teliti seringkali rumit dan tidak presisi, karena mikroalga yang tidak dapat dilihat secara langsung dengan mata, kecuali dengan menggunakan mikroskop. Kapasitor dibuat sebagai alat ukur Kapasitansi suatu medium/zat. Mikroalga Scenedesmus memiliki materi genetik yang memiliki sifat dielektrik sehingga dapat diukur besar kapasitansi sel Scenedesmus tersebut. Kapasitansi Scenedesmus merepresentasikan jumlah sel secara eksak pada suatu medium. Dengan membandingkan besar kapasitansi medium yang mengandung mikroalga dengan jumlah sel melalui perhitungan dengan Counting chamber dan nilai absorbansi dengan spektrofotometer, didapati perbandingan yang sama dari besar kapasitansi, jumlah sel, dan absorbansi. Perhitungan dengan prinsip kapasitansi ini juga diharapkan dapat menghitung jumlah sel dengan lebih presisi dan dengan cara yang lebih mudah.

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The Calculation of the number of microalgae cells thoroughly was often considered as a complicated and imprecise process, because microalgae could not be seen directly by the eye, but using a microscope. Capacitors was created as a tool to measure capacitance of a medium/substance. Microalgae Scenedesmus contained genetic material which has dielectric properties, that could be measured the value of capacitance of the Scenedesmus cells Capacitance of Scenedesmus represented the exact number of cells in a medium. By the comparing the value of medium containing microalgae capacitance with the cell number by calculating the calue of Counting Chamber and Absorbance with a spectrophotometer, the same ratio was found from the capacitance value, cell number, and absorbance. Calculation using capacitance principle was also expected to count the number of cell with more precision and easier way."

"ABSTRACTPencemaran lingkungan merupakan hasil proses produksi yang menghasilkan limbah. Beberapa jenis limbah mengandung senyawa fosfat dengan konsentrasi yang tinggi sebelum dibuang ke perairan. Pada penelitian ini digunakan jenis mikroalga Scenedesmus sp. sebagai agen bioremediator fosfat yang diharapkan dapat diaplikasikan dalam menurunkan kadar fosfat pada perairan serta meningkatkan kualitas lingkungan tersebut. Dilakukan variasi fosfat yang diuji untuk melihat pengaruh berbagai jenis fosfat yang terdapat pada perairan berupa variasi fosfat organik menggunakan senyawa adenosine monofosfat AMP, myo-inositol hexakis dihidrogen fosfat dan variasi fosfat anorganik menggunakan senyawa monopotassium fosfat KH2PO4, sodium tripolifosfat STPP. Didapatkan penggunaan monopotassium fosfat KH2PO4 lebih baik dalam penurunan kadar fosfat dan kenaikan jumlah sel Scenedesmus sp. dengan persen penurunan fosfat sebesar 87,5. Parameter uji kualitas lingkungan yang dilakukan adalah suhu dan pH. Pengaplikasian langsung pada air limbah sumber muara angke didapat juga berhasil menurunkan kadar fosfat dan terjadi kenaikan jumlah sel Scenedesmus. Scenedesmus sp. memiliki kemampuan untuk mengurangi nutrisi dalam air limbah hingga dibawah ambang batas baku mutu air limbah sebesar 86,0 dari konsentrasi awal fosfat 0,2255 ppm menurun menjadi 0,0314 ppm. Pengamatan proses bioremediasi dilakukan pada mikroalga Scenedesmus selama 18 hari dengan pengukuran kadar fosfat dan parameter kualitas lingkungan dilakukan selama 3 hari sekali.

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ABSTRACTEnvironmental pollution is the result of the production process which produces waste. Several types of waste contain phosphate compounds with high concentrations before being discharged into the water. This study used Scenedesmus sp. as a phosphate bioremediator agent that is expected to be applied in lowering the phosphate levels in the water as well as improving the quality of the environment. Variations of phosphate were tested to see the effect of various types of phosphate found in the waters in the form of a variation of organic phosphate using the adenosine monophosphate AMP, myo inositol hexakis dihydrogen phosphate and variations of inorganic phosphates using monopotassium phosphate KH2PO4, sodium tripolyphosphate STPP. It was found that the use of monopotassium phosphate KH2PO4 was better in decreasing phosphate levels and increasing the number of Scenedesmus sp cells. with a phosphate decrease percentage of 87.5. The environmental quality test parameters are temperature and pH. Direct application in wastewater of Muara angke was also found to decrease phosphate levels and increase the number of Scenedesmus sp. cells. Scenedesmus sp. has the ability to reduce nutrients in wastewater to below wastewater quality standard of 86.0 from the initial phosphate concentration of 0.2255 ppm to 0.0314 ppm. Observation of bioremediation process is conducted on Scenedesmus sp. microalgae with the measurement of phosphate for 18 days and environmental quality parameters for once every 3 days."

"Metode penghitungan dan pertumbuhan sel mikroaga dengan kapasitor plat sejajar terbukti dapat dilakukan. Karakteristik sel mikroalga hidup dan mati dapat diamati dengan memberikan fungsi frekuensi pada kapasitor. Penelitian ini bertujuan untuk mengetahui kurva pertumbuhan, nilai kapasitansi satu unit sel dan perbedaan kapasitansi sel hidup dan mati pada Scenedesmus sp. dan Chlorella vulgaris. Metode yang digunakan adalah membandingkan nilai kapasitansi terhadap absorbansi dari spektrofotometer dan perhitungan jumlah sel menggunakan Neubauer chamber. Karakteristik sel hidup dan mati diamati dengan pemberian fungsi frekuensi menggunakan alat LCR meter.Hasil analisis perbandingan nilai kapasitansi terhadap absorbansi dan perhitungan jumlah sel menunjukkan tingkat kelinearan yang tinggi, sehingga hasil kurva pertumbuhan dapat merepresentasikan kondisi sebenarnya. Pada rentang frekuensi 50 kHz sampai 1 MHz, frekuensi 900 kHz pada Scenedesmus sp. dan frekuensi 50 kHz pada Chlorella vulgaris merupakan frekuensi dengan tingkat pengkarakteristik yang cukup baik karena memberikan nilai perbedaan cukup besar pada kapasitansi sel hidup dan mati. Penambahan fungsi frekuensi mempengaruhi nilai kapasitansi satu unit sel. Kapasitansi satu unit sel Scenedesmus sp. berkisar dari 3,2 x 10-7 pF sampai 1 x 10-6 pF, sedangkan pada Chlorella vulgaris berkisar dari 2,56 x 10-8 pF sampai 3,23 x 10-7 pF.

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Method of measuring the amount and growth of microalgae cells with parallel plate capacitor has been proven. Characteristics of microalgae cell life and death can be observed by giving the frequency function on the capacitor. This study aims to determine the growth curve, the capacitance of the unit cell and cell capacitance difference of life and death on Scenedesmus sp. and Chlorella vulgaris. The method used is to compare the capacitance value of the absorbance of the spectrophotometer and calculating the number of cells using a Neubauer chamber. Characteristics of live and dead cells were observed by giving the frequency function using a LCR meter.

Results of comparative analysis of the capacitance value of the absorbance and the calculation of the number of cells show a high degree of linearity, so that the growth curve can represent actual conditions. In the frequency range of 50 kHz to 1 MHz, a frequency of 900 kHz at Scenedesmus sp. and a frequency of 50 kHz at Chlorella vulgaris is a fairly good level of characteristics as it gives value large enough difference in capacitance cell life and death. The addition of frequency function affects the capacitance value of the unit cell. The capacitance of the unit cell Scenedesmus sp. ranging from 3,2 x 10-7 pF to 1 x 10-6 pF, whereas the Chlorella vulgaris ranging from 2,56 x 10-8 pF to 3,23 x 10-7 pF."

"Mikroalga merupakan solusi alternatif untuk menyelesaikan masalah kekurangan gizi di Indonesia. Penelitian ini bertujuan untuk mengetahui kadar protein dan asam amino pada mikroalga Scenedesmus sp dan Coelastrum sp. Kadar protein diukur menggunakan metode Biuret dan kurva standar BSA (Bovine Serum Albumin) yang diukur pada panjang gelombang 540 nm.Hasil pengukuran kadar protein dengan metode Biuret didapatkan persentase proteinnya yaitu 4.16 % untuk mikroalga Scenedesmus sp dan 1.64 % untuk mikroalga Coelastrum sp. Penentuan kandungan asam amino dilakukan menggunakan metode KCKT (Kromatografi Cair Kinerja Tinggi).Hasil analisis kandungan asam amino menunjukkan hasil bahwa asam amino esensial leusin merupakan asam amino esensial yang memiliki kandungan terbanyak pada mikroalga Coelastrum sp dan pada mikroalga Scenedesmus sp asam amino esensial lisin merupakan asam amino yang memiliki kandungan terbanyak. Sedangkan untuk kandungan asam amino non esensial diperoleh hasil bahwa asam amino glutamat merupakan asam amino yang memiliki kandungan terbanyak pada mikroalga Scenedesmus sp dan Coelastrum sp.Pada penelitian ini dilakukan juga perhitungan jumlah sel alga dengan metode kapasitansi dimana hasil perhitungan dibandingkan dengan perhitungan jumlah sel menggunakan Counting chamber dan nilai absorbansi dengan spektrofotometer, dan didapatkan perbandingan yang sama dari besar kapasitansi, jumlah sel, dan absorbansi.

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Microalgae is an alternative solution to solve the problem of the lack of nutrient in Indonesia. The aims of this research is to determine protein concentration and amino acids in the microalgae Scenedesmus sp. and Coelastrum sp. Measurument of protein concentration using the Biuret method with a standard curve of BSA (Bovine Serum Albumin) is measured at a wavelength of 540 nm.

The results of protein obtained with Biuret method is 4.16% to microalgae Scenedesmus sp. and 1.64% for microalgae Coelastrum sp. Determination of the amino acid is done using HPLC (High Performance Liquid Chromatography).

Results of the analysis of amino acid content shows that the highest essential amino acid of microalgae coelastrum sp is leucine, and lysine is the highest essential amino acid of microalgae scenedesmus sp. And glutamic is the highest non-essential amino acid of microalgae Scenedesmus sp. and Coelastrum sp.

In this research, we also calculate the number of algal cells with a capacitance method in which the calculation results as compared with the calculation of the number of cells using the Counting chamber and absorbance values with a spectrophotometer, and obtained the same proportion of large capacitance, the number of cells, and absorbance."

"AFI (AVO Fluid Inversion) menganalisa respon dari anomali AVO, kemudian membandingkannya dengan respon yang didapat secara teori dan memprediksi sifatsifat fluida. AFI dalam prosesnya terbagi dalam 2 tahap. Tahap pertama didapatkan peta atribut AVO. Pada peta ini akan ditentukan zona-zona berdasarkan intensitas warna. Tahap selanjutnya melakukan analisa tren dari data sumur. Dari analisa tersebut didapat model parameter stochastic. Hasil penggabungan model parameter stochastic dengan ekstraksi wavelet dari data seismik akan didapat simulasi crosplot antara perpotongan (Intercept) dan kemiringan (Gradient) yang terdiri dari 3 fluida yaitu minyak, gas dan brine. Dari simulasi crosplot tersebut dimasukkan sayatansayatan data dari peta atribut AVO yang akan menentukan penyebaran kandungan reservoar hidrokarbon. Penentuan karakteristik hidrokarbon diperkuat lagi dengan peta indikasi dan peta probabilitas. Dari penggunaan analisa AFI dapat diketahui bahwa karakteristik reservoar hidrokarbon pada daerah TPS merupakan gas dan didominasi oleh minyak.

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AFI (AVO Fluid Inversion) analyze AVO response, compare them without theoretically derived response and predict fluid properties. There are two steps in AFI process. First, using AVO attribute maps. In this map will be decided zones based on color intensity. The next step is doing trend analysis from well database. From that analyze will obtain stochastic models parameters. The result from gathering stochastic models parameters and wavelet extraction from seismic data are crossplot simulation between intercept and gradient which consist of oil, gas and brine. Then input data slices from AVO attribute maps to crossplot simulation which will determine hydrocarbon reservoar distribution. The determine of hydrocarbon characteristic will be more certain with indication and probability maps. By using AFI analysis can be determine that hydrocarbon reservoar characteristic at TPS is gas and dominated by oil."

"Penggunaan refrigeran HFC dan HCFC yang mempunyai dampak terhadap ozon lebih kecil dibandingkan CFC, ternyata dari masyarakat pemerhati lingkungan mengajukan keberatan atas penggunaan jenis refrigeran ini. Karena senyawa ini masih memiliki potensi pemanasan global atau GWP (Global Warming Potensial) yang cukup tinggi. Walaupun pelarangan resmi secara internasional senyawa ini belum ada, pada beberapa negara main seperti negara-negara di Eropa mengkategorikan refrigeran HFC dan HCFC sebagai refrigeran yang harus dikontrol penggunaannya dan mengusulkan agar jadwal pengurangannya harus diatur secara internasional.Refrigeran alternative hidrokarbon dengan komposisi utama propana, yang tidak memiliki dampak terhadap pengurangan ozon dan tidak memiliki dampak terhadap pemanasan global saat ini di tawarkan sebagai pengganti HCFC-22- Dari hasil pengujian unjuk kerja refrigeran hidrokarbon H dapat menggantikan refrigeran HCFC-22, dan juga mempunyai beberapa kelebihan diantaranya tekanan kondensasi, temperatur buang, dan daya listrik yang rendah dibandingkan refrigeran HCFC-22."

"[Lapangan “X” merupakan lapangan gas terbesar di delta mahakam dengan luas area permukaan yang mancapai 1350km2 dan total akumulasi gas terproduksi mencapai 8 tcf sejak tahun 1990 hingga saat ini. Penurunan produksi yang cukup tajam melatarbelakangipengembangan gas di zona dangkal (shallow gas). Sedimen pada zona dangkal ini tersusun oleh endapan deltaik berumur Miosen Atas – Pliosen dengan batupasir sebagai batuan reservoar utama. Keberadaan fluida gas pada batupasir akan berdampak pada penurunan kecepatan gelombangP dan densitas batuan sehingga memberikan kontras impendansi akustik yang kuat terhadaplapisan shale. Kontras impedansi akustik ini terlihat sebagai anomali amplitudo (brightspot)pada seismik. Adanya kenaikan nilai amplitudo seiring dengan bertambah besarnya sudutdatang menjadi hal yang menarik dalam interpretasi shallow gas ini.Tujuan dari penelitian ini adalah untuk mendeteksi keberadaan shallow gas di lapangan “X”menggunakan atribut AVO Sismofacies dengan 2 sumur yang dijadikan referensi untukpemodelan synthetic AVO. Penulis menggunakan 2 sumur lainnya sebagai kalibrasi terhadapanomali AVO dari Sismofacies cube yang dihasilkan.Metode AVO sismofacies ini tidak menggunakan parameter intercept (A) dan gradient (B)untuk kalkulasi AVO melainkan menggunakan dua data substack yaitu Near dan Far stack.Crossplot antara Near dan Far pada zona water bearing sand dan shale diambil untukmendapatkan background trend sehingga anomali yang berada diluar trend tersebut dapatdiinterpretasikan sebagai gas sand.Hasil dari analisis AVO Sismofacies ini cukup baik dan menunjukkan kesesuaian denganinterpretasi gas di beberapa sumur dan efek Coal berkurang jika dibandingkan Far stack.Meskipun demikian interpretasi AVO ini sebaiknya diintergrasikan dengan analisis dariatribut seismik lainnya untuk memperkuat interpretasi;Field “X” is a giant gas field in mahakam delta which cover 1350km2 of the area with totalcummulative gas production has reached 8 tcf since 1990 to recently. A significantdecreasing of gas production has led to produce gas accumulation in shallow zone as aneffort to fight againts this decline. Shallow zone is a deltaic sediments which depositedduring Upper Miocen to Pliocene with dominant reservoir is sandstone.The presence of gas in sandstone has an impact on decreasing of velocity P as well as densitywhich giving a contrast of acoustic impedance to the overlaying shale. Contrast ofimpedance can be observes in seismic as an amplitude anomaly or so called a brightspot. Anincrease of amplitude along the offset become more interesting in shallow gas interpretation.The aim of this study is to detect shallow gas accumulation di field “X” by using AVOSismofacies attribute with 2 wells as references to model respons of AVO. The result ofAVO sismofacies will be a cube and the interpreation will be calibrated with 2 existing wellscontaining proven gas bearing sands.AVO Sismofacies method will introduce Near and Far substack to be used in the calculationinstead of using common AVO paramter intecepth (A) and gradient (B). A crossplot betweensubstacks will create a background trend from water bearing zone and shale hence anyoutliers can, then,be interpreted as gas anomaly.AVO Sismofacies result is encouraging and some of AVO anomaly has been well calibratedwith existing wells. Coal effect which led to misintepretaion in shallow gas sand isdiminished compared to Far stack. Despite of this result, this anomaly interpretation need tobe intergrated with anothers seismic attribute to gain the level of confidence for shallow gasinterpretation., Field “X” is a giant gas field in mahakam delta which cover 1350km2 of the area with totalcummulative gas production has reached 8 tcf since 1990 to recently. A significantdecreasing of gas production has led to produce gas accumulation in shallow zone as aneffort to fight againts this decline. Shallow zone is a deltaic sediments which depositedduring Upper Miocen to Pliocene with dominant reservoir is sandstone.The presence of gas in sandstone has an impact on decreasing of velocity P as well as densitywhich giving a contrast of acoustic impedance to the overlaying shale. Contrast ofimpedance can be observes in seismic as an amplitude anomaly or so called a brightspot. Anincrease of amplitude along the offset become more interesting in shallow gas interpretation.The aim of this study is to detect shallow gas accumulation di field “X” by using AVOSismofacies attribute with 2 wells as references to model respons of AVO. The result ofAVO sismofacies will be a cube and the interpreation will be calibrated with 2 existing wellscontaining proven gas bearing sands.AVO Sismofacies method will introduce Near and Far substack to be used in the calculationinstead of using common AVO paramter intecepth (A) and gradient (B). A crossplot betweensubstacks will create a background trend from water bearing zone and shale hence anyoutliers can, then,be interpreted as gas anomaly.AVO Sismofacies result is encouraging and some of AVO anomaly has been well calibratedwith existing wells. Coal effect which led to misintepretaion in shallow gas sand isdiminished compared to Far stack. Despite of this result, this anomaly interpretation need tobe intergrated with anothers seismic attribute to gain the level of confidence for shallow gasinterpretation.]"

"Plastik merupakan senyawa polimer hidrokarbon petrokimia yang memiliki nilai tambah dan densitas energi yang tinggi. Namun plastik yang tidak diolah dengan baik menyebabkan berbagai pencemaran lingkungan. Maka proses konversi plastik menjadi bahan kimia dengan nilai tambah melalui perengkahan dengan metode katalitik pirolisis dikembangkan. Dalam penelitian ini dilakukan sintesis zeolit H/ZSM-5 dengan metode hidrotermal dan Low Temperature Synthesis (LTS) yang selanjutnya dikarakterisasi menggunakan XRD, FTIR, SEM, BET dan TGA. Kemudian dilakukan perengkahan pada plastik jenis Low Density Polyethylene (LDPE) dengan teknik thermalgravimetrik dengan rasio campuran antara LDPE dan Katalis (9:1). Didapatkan hasil yang diurutkan sesuai performa H/ZSM-5 H2 (∆T50 = 20.46oC) > H/ZSM-5 H1 (∆T50 = 20.26oC) > H/ZSM-5 M (∆T50 = 16.55oC) . Energi aktivasi didapatkan dengan menggunakan persamaan Arrhenius dan Coats-Redfern dengan orde reaksi sama dengan satu. Didapatkan energi aktivasi untuk H/ZSM-5 H2 209 kJ/mol, H/ZSM-5 H1 271 kJ/mol, dan H/ZSM-5 M 277 kJ/mol.

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Plastic is a petrochemical hydrocarbon polymer compound that has a high added value and high energy density. However, plastic that is not treated properly causes a variety of environmental pollution. Then the process of converting plastics into chemicals with added value through cracking with the pyrolysis catalytic method was developed. In this research, the synthesis of zeolite H / ZSM-5 using the hydrothermal method and Low Temperature Synthesis (LTS) was then characterized using XRD, FTIR, SEM, BET and TGA. . Then cracking is done on plastic type Low Density Polyethylene (LDPE) with thermalgravimetric technique with a mixture ratio between LDPE and catalyst (9: 1). The results are sorted according to performance H / ZSM-5 H2 (∆T50 = 20.46oC) > H / ZSM-5 H1 (∆T50 = 20.26oC)> H / ZSM-5 M (∆T50 = 16.55oC). The activation energy is obtained using the Arrhenius and Coats-Redfern equations with a reaction order equal to one. Activation energy obtained for H/ZSM-5 H2 209 kJ / mol, H /ZSM-5 H1 271 kJ / mol, and H/ZSM-5 H1 277 kJ / mol."

"[Lapangan X merupakan lapangan mature yang berada di Cekungan Sumatera Tengah. Lapangan ini memiliki struktur antiklin produk dari reverse oblique-slip fault yang membentuk zona patahan di sisi Barat Lapangan X. Zona ini terbukti menghasilkan hidrokarbon ditunjukan oleh sumur produksi X-027, X-153 dan X 154. Sehingga zona patahan ini memiliki potensi untuk di eksplorasi lebih lanjut. Namun, kondisi seismik di zona ini chaotic sehingga sulit untuk menginterpretasikan zona patahan. Penelitian ini akan menggunakan metode geoelectric IVEL dan continuous wavelet transform (CWT) untuk mendapatkan informasi keberadaan hidrokarbon dizona patahan Lapangan X. Geoelectric IVEL (Inversion Vertical Electrical Logging) menggunakan metode vertical sounding schlumberger yang diolah untuk menghasilkan penampang resistivitas medium. Hasil penampang resistivitas medium pada penelitian ini menunjukkan adanya kemiripan nilai resitivitas dengan nilai log resistivitas sumur untuk zona reservoar 350sd dan 550sd (10-20 ohmm). Nilai resistivitas ini terlihat juga di zona patahan yang dijadikan indikator hidrokarbon. Hasil dalam domain kedalaman membantu dalam interpretasi kedalaman reservoar di zona patahan. Analisis continuous wavelet transform (CWT) pada penelitian ini menunjukan amplitudo tinggi pada frekuensi rendah 5-20 Hz dan merupakan indikasi adanya hidrokarbon. Amplitudo tinggi pada frekuensi rendah telihat juga di zona patahan, pada posisi dimana IVEL menunjukan nilai resistivitas sebagai indikator.

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Hidrocarbon X field is a mature field in Central Sumatera Basin. It has anticline structure as a result of reverse oblique-slip fault that produces fault zone in the North side of X Field. It is proved hydrocarbon with the production well X-027, X-153 and X-154. However, it is very difficult to interpret the fault zone with the available seismic data because of the chaotic seismic condition in fault zone. This study uses Ivel Geoelectric method and Continuous Wavelet Transform (CWT) to get hydrocarbon indicator in fault zone. Geoelectric IVEL (Inversion Vertical Electrical Logging) using vertical sounding schlumberger is processed to get medium resistivity section. Medium resistivity section from geoelectrical IVEL at reservoir zone showes similar resistivity value with resistivity log (10-20ohm) for reservoar 350sd and 550sd. This value is showed in fault zone as hydrocarbon indicator. Medium resistivity geoelectrical IVEL is depth domain. It is helpful for interpretation of reservoir depth at fault zone, that is not able to be done by seismic. Continuous wavelet transform (CWT) showes high amplitude at low frequency (5-20Hz) as hydrocarbon indicator. High amplitude at low frequency is showed in fault zone where IVEL showes the hydrocarbon indicator;X field is a mature field in Central Sumatera Basin. It has anticline structure as a

result of reverse oblique-slip fault that produces fault zone in the North side of X Field. It is proved hydrocarbon with the production well X-027, X-153 and X-154. However, it is very difficult to interpret the fault zone with the available seismic data because of the chaotic seismic condition in fault zone. This study uses Ivel Geoelectric method and Continuous Wavelet Transform (CWT) to get hydrocarbon indicator in fault zone. Geoelectric IVEL (Inversion Vertical Electrical Logging) using vertical sounding schlumberger is processed to get medium resistivity section. Medium resistivity section from geoelectrical IVEL at reservoir zone showes similar resistivity value with resistivity log (10-20ohm) for reservoar 350sd and 550sd. This value is showed in fault zone as hydrocarbon indicator. Medium resistivity geoelectrical IVEL is depth domain. It is helpful for interpretation of reservoir depth at fault zone, that is not able to be done by seismic. Continuous wavelet transform (CWT) showes high amplitude at low frequency (5-20Hz) as hydrocarbon indicator. High amplitude at low frequency is showed in fault zone where IVEL showes the hydrocarbon indicator;X field is a mature field in Central Sumatera Basin. It has anticline structure as a result of reverse oblique-slip fault that produces fault zone in the North side of X Field. It is proved hydrocarbon with the production well X-027, X-153 and X-154. However, it is very difficult to interpret the fault zone with the available seismic data because of the chaotic seismic condition in fault zone. This study uses Ivel Geoelectric method and Continuous Wavelet Transform (CWT) to get hydrocarbon indicator in fault zone. Geoelectric IVEL (Inversion Vertical Electrical Logging) using vertical sounding schlumberger is processed to get medium resistivity section. Medium resistivity section from geoelectrical IVEL at reservoir zone showes similar resistivity value with resistivity log (10-20ohm) for reservoar 350sd and 550sd. This value is showed in fault zone as hydrocarbon indicator. Medium resistivity geoelectrical IVEL is depth domain. It is helpful for interpretation of reservoir depth at fault zone, that is not able to be done by seismic. Continuous wavelet transform (CWT) showes high amplitude at low frequency (5-20Hz) as hydrocarbon indicator. High amplitude at low frequency is showed in fault zone where IVEL showes the hydrocarbon indicator.;X field is a mature field in Central Sumatera Basin. It has anticline structure as a

result of reverse oblique-slip fault that produces fault zone in the North side of X Field. It is proved hydrocarbon with the production well X-027, X-153 and X-154. However, it is very difficult to interpret the fault zone with the available seismic because of the chaotic seismic condition in fault zone. This study uses IVEL Geoelectric method and Continuous Wavelet Transform (CWT) to get hydrocarbon indicator in fault zone. Geoelectric IVEL (Inversion Vertical Electrical Logging) using vertical sounding schlumberger is processed to get medium resistivity section. Medium resistivity section from geoelectrical IVEL at reservoir zone showes similar resistivity value with resistivity log (10-20ohm) for reservoar 350sd and 550sd. This value is showed in fault zone as hydrocarbon indicator. Medium resistivity geoelectrical IVEL is depth domain. It is helpful for interpretation of reservoir depth at fault zone, that is not able to be done by seismic. Continuous wavelet transform (CWT) showes high amplitude at low frequency (5-20Hz) as hydrocarbon indicator. High amplitude at low frequency is showed in fault zone where IVEL showes the hydrocarbon indicator, X field is a mature field in Central Sumatera Basin. It has anticline structure as a

result of reverse oblique-slip fault that produces fault zone in the North side of X

Field. It is proved hydrocarbon with the production well X-027, X-153 and X-154.

However, it is very difficult to interpret the fault zone with the available seismic data

because of the chaotic seismic condition in fault zone. This study uses Ivel

Geoelectric method and Continuous Wavelet Transform (CWT) to get hydrocarbon

indicator in fault zone.

Geoelectric IVEL (Inversion Vertical Electrical Logging) using vertical sounding

schlumberger is processed to get medium resistivity section. Medium resistivity

section from geoelectrical IVEL at reservoir zone showes similar resistivity value

with resistivity log (10-20ohm) for reservoar 350sd and 550sd. This value is showed

in fault zone as hydrocarbon indicator. Medium resistivity geoelectrical IVEL is

depth domain. It is helpful for interpretation of reservoir depth at fault zone, that is

not able to be done by seismic. Continuous wavelet transform (CWT) showes high

amplitude at low frequency (5-20Hz) as hydrocarbon indicator. High amplitude at

low frequency is showed in fault zone where IVEL showes the hydrocarbon indicator]"