[ABSTRAK
Lapangan panasbumi Wayang Windu (WW) merupakan bagian dari busurgunungapi Kuarter Jawa Barat, terdiri dari komplek gunungapi dan domeMalabar, Bedil, Wayang, dan Windu yang berkontribusi pada pembentukansistem panasbumi. Tipe fluida terdiri dari dua-fasa di area Selatan dankecenderungan dominasi uap di Utara dengan kisaran temperatur reservoir 240hingga 300 0C. Segmentasi secara hidrologi dibuat berdasarkan karakterisasitekanan reservoir dari 40 di Utara hingga 80 bar di Selatan pada kondisi awal.Setelah melewati masa produksi lebih dari 13 tahun, telah terjadi perubahan direservoir yang terlihat baik pada parameter fisik maupun kimia. Kegiatanmonitoring geokimia dan microravity telah diterapkan di WW untuk mencatatsetiap perubahan di reservoir dan sebagai mitigasi masalah yang timbul selamaeksploitasi ataupun untuk pengenbangan selanjutnya. Respon kimiawi akibatproduksi digambarkan dalam perubahan area isokontur dari semua parameterkimia yang terlihat jelas perubahannya di area Utara. Proses di reservoir sepertikondensasi teridentifikasi melalui kenaikan CO2/H2S sebagai respon daripenurunan H2S, serta efek dilusi minor teridentifikasi melalui penurunan klorida.Indikasi kehadiran brine dibawah zona dominasi uap di Utara dicirikan olehkenaikan boron, klorida, dan silika. Secara singkat, evolusi fluida yang terjadi diWW akibat proses produksi yaitu terjadinya warm recharge atau brine carryoverdi sumur kering atau zona dominasi uap di Utara, serta perubahan fasa fluida daridua-fasa menjadi dominasi liquid pada zona dua-fasa di Selatan. Evolusi fisikselama proses produksi juga diamati dengan baik melalui pengukuran perubahangravity sebagai akibat dari perubahan saturasi liquid pada batuan hasil dariekstraksi fluida dari reservoir. Integrasi data evolusi fluida di WW selamaproduksi dan aktivitas monitoring berkelanjutan telah memberikan manfaatterhadap strategi sustainabilitas produksi dan strategi pengembangan.
ABSTRACT
Wayang Windu (WW) geothermal field is part of Quaternary volcanic arclocated in Western of Java Island. It consists of volcanic complex and domes ofMalabar, Bedil, Wayang, and Windu which contribute to geothermal systemformation. Fluid phase were dominantly of two-phase fluid in the Southern areaand likelihood of vapor dominated in the Northern area with temperature rangesof 240 up to 3000C. Hydrological segmentation characterized by pressure rangingfrom 40 to 85 bar at the North to southern part respectively at initial condition.More than 13 year production, has led the reservoir to change and respond tophysical and chemical parameter. Geochemistry and microgravity monitoring hasbeen applied to record reservoir changes and mitigate problems duringexploitation or future development. Chemical respond related to productionimpact decribed by change in isocontour area of all chemistry parameter seen innorthern part of the field. Reservoir processes such as condensation identified byincreasing CO2//H2S followed by decreased H2S, and minor dilution effect inWW identified by decreased choride. Indication of brine existance beneath thesteam cap area in Northern wells, identified by increased boron, chloride, andsilica in some of dry steam wells. Fluid evolution due to production in WWsummarize as the process of warm recharge or brine carryover in dry steam wells,and changing from two-phase fluid into liquid dominated is one of the evolutionhappened in two-phase area in Southern area. Physical evolution duringproduction also monitored by well defined gravity change measurement as therock density change due to fluid extraction from reservoir. Data integration of thefluid evolution in WW during production and continuous monitoring activity givebenefit to production sustainability strategy and future development area.;Wayang Windu (WW) geothermal field is part of Quaternary volcanic arclocated in Western of Java Island. It consists of volcanic complex and domes ofMalabar, Bedil, Wayang, and Windu which contribute to geothermal systemformation. Fluid phase were dominantly of two-phase fluid in the Southern areaand likelihood of vapor dominated in the Northern area with temperature rangesof 240 up to 3000C. Hydrological segmentation characterized by pressure rangingfrom 40 to 85 bar at the North to southern part respectively at initial condition.More than 13 year production, has led the reservoir to change and respond tophysical and chemical parameter. Geochemistry and microgravity monitoring hasbeen applied to record reservoir changes and mitigate problems duringexploitation or future development. Chemical respond related to productionimpact decribed by change in isocontour area of all chemistry parameter seen innorthern part of the field. Reservoir processes such as condensation identified byincreasing CO2//H2S followed by decreased H2S, and minor dilution effect inWW identified by decreased choride. Indication of brine existance beneath thesteam cap area in Northern wells, identified by increased boron, chloride, andsilica in some of dry steam wells. Fluid evolution due to production in WWsummarize as the process of warm recharge or brine carryover in dry steam wells,and changing from two-phase fluid into liquid dominated is one of the evolutionhappened in two-phase area in Southern area. Physical evolution duringproduction also monitored by well defined gravity change measurement as therock density change due to fluid extraction from reservoir. Data integration of thefluid evolution in WW during production and continuous monitoring activity givebenefit to production sustainability strategy and future development area.;Wayang Windu (WW) geothermal field is part of Quaternary volcanic arclocated in Western of Java Island. It consists of volcanic complex and domes ofMalabar, Bedil, Wayang, and Windu which contribute to geothermal systemformation. Fluid phase were dominantly of two-phase fluid in the Southern areaand likelihood of vapor dominated in the Northern area with temperature rangesof 240 up to 3000C. Hydrological segmentation characterized by pressure rangingfrom 40 to 85 bar at the North to southern part respectively at initial condition.More than 13 year production, has led the reservoir to change and respond tophysical and chemical parameter. Geochemistry and microgravity monitoring hasbeen applied to record reservoir changes and mitigate problems duringexploitation or future development. Chemical respond related to productionimpact decribed by change in isocontour area of all chemistry parameter seen innorthern part of the field. Reservoir processes such as condensation identified byincreasing CO2//H2S followed by decreased H2S, and minor dilution effect inWW identified by decreased choride. Indication of brine existance beneath thesteam cap area in Northern wells, identified by increased boron, chloride, andsilica in some of dry steam wells. Fluid evolution due to production in WWsummarize as the process of warm recharge or brine carryover in dry steam wells,and changing from two-phase fluid into liquid dominated is one of the evolutionhappened in two-phase area in Southern area. Physical evolution duringproduction also monitored by well defined gravity change measurement as therock density change due to fluid extraction from reservoir. Data integration of thefluid evolution in WW during production and continuous monitoring activity givebenefit to production sustainability strategy and future development area., Wayang Windu (WW) geothermal field is part of Quaternary volcanic arclocated in Western of Java Island. It consists of volcanic complex and domes ofMalabar, Bedil, Wayang, and Windu which contribute to geothermal systemformation. Fluid phase were dominantly of two-phase fluid in the Southern areaand likelihood of vapor dominated in the Northern area with temperature rangesof 240 up to 3000C. Hydrological segmentation characterized by pressure rangingfrom 40 to 85 bar at the North to southern part respectively at initial condition.More than 13 year production, has led the reservoir to change and respond tophysical and chemical parameter. Geochemistry and microgravity monitoring hasbeen applied to record reservoir changes and mitigate problems duringexploitation or future development. Chemical respond related to productionimpact decribed by change in isocontour area of all chemistry parameter seen innorthern part of the field. Reservoir processes such as condensation identified byincreasing CO2//H2S followed by decreased H2S, and minor dilution effect inWW identified by decreased choride. Indication of brine existance beneath thesteam cap area in Northern wells, identified by increased boron, chloride, andsilica in some of dry steam wells. Fluid evolution due to production in WWsummarize as the process of warm recharge or brine carryover in dry steam wells,and changing from two-phase fluid into liquid dominated is one of the evolutionhappened in two-phase area in Southern area. Physical evolution duringproduction also monitored by well defined gravity change measurement as therock density change due to fluid extraction from reservoir. Data integration of thefluid evolution in WW during production and continuous monitoring activity givebenefit to production sustainability strategy and future development area.] |
T43399-dwiyogarani malik .pdf :: Unduh