Hasil Pencarian  ::  Simpan CSV :: Kembali

"

Proses pengolahan gas alam umumnya dimulai dari pemisahan tiga fase dari gas umpan sampai kepada gas jual yang memenuhi spesifikasi dari konsumen (buyer). Pabrik Z adalah pabrik yang mengolah gas alam umpan dimana terdapat kandungan senyawa Hidrogen Sulfida (H₂S) sebesar 1000 ppm dan Carbon Dioxida (CO₂) sebesar 5% mole. Proses pengolahannya di mulai dari aliran gas umpan dipisahkan berdasarkan densitinya di bejana tekanan tinggi pemisah (Separator) tiga fase lalu dipisahkan senyawa H₂S dan CO₂ (Sweetening) di unit Acid Gas Removal Unit lalu dikeringkan di unit Dehydration untuk kemudian dipisahkan kembali hidrokarbon beratnya di unit pengontrolan titik embun (Dew Point Control Unit). Pabrik Z ini menghasilkan gas jual sebesar 310 MMscfd dengan kandungan H₂S 1 ppmv dan CO₂ 50 ppmv. Penelitian ini dilakukan untuk mengetahui dampak produksi gas alam dan kondensat beserta keekonomiannya bila proses pengolahannya dimodifikasi dengan penempatan Dew Point Control Unit pada hilir Separator tiga fase. Dimana metodologi penelitian yang digunakan adalah berupa simulasi menggunakan simulator yang membandingkan kondisi di aktual proses pengolahan dengan kondisi setelah proses modifikasi di pengolahan gas alamnya. Setelah diamati bahwa pada pengolahan gas yang dimodifikasi dengan menempatkan DPCU di hilir separator berdampak pada tingkat produksi kondensat dengan jumlah 8576 barel perhari dibandingkan dengan 7852 barel perhari dari jumlah produksi kondensat yang ada saat ini di pabrik Z.

 

---

The processing of natural gas generally starts from the separation of three phases from the feed gas to the selling gas that meets the specifications of the buyer. Factory Z is a factory that treats feed gas where there are contents of Hydrogen Sulfide (H₂S) of 1000 ppm and Carbon Dioxida (CO₂) of 5% mole. The gas processing starts from the flow of feed gas being separated based on its density in the three phase high pressure separator vessel and then H₂S and CO₂ removal (Sweetening) in the Acid Gas Removal Unit and then gas dried in the Dehydration unit thus continue to hydrocarbon separation in the Dew Point Control Unit. This plant Z produces gas sales of 310 MMscfd with H₂S 1 ppmv and 50 ppmv CO₂. This research was conducted to determine the impact of sales gas and condensate production profiles, and also to estimate the economical aspect if the gas processing is to be modified by placing the Dew Point Control Unit in the downstream of three phase separator. Where the research methodology used is in the form of a simulation using a simulator, that compares the actual conditions of the gas treatment process at plant Z with the conditions after the gas treatment process modification in processing natural gas. It was observed that it has impact on production rate of condensate at the modified gas processing by placing DPCU with amount of 8576 barrel/day compare with 7852 barrel/day produced from existing plant Z condensate rate.

"

"ABSTRAKStudi ini merupakan kajian mengenai pengaruh skenario Wellhead Cluster, Flowline dan fasilitas pemisahan gas asam atau Acid Gas Removal Unit (AGRU), terhadap investasi yang diperlukan dalam pengembangan suatu lapangan gas baru. Terdapat dua skenario Wellhead Cluster, dimana dalam Skenario-1 diasumsikan gas dari setiap Wellhead Cluster akan dialirkan langsung oleh Flowline menuju Separator dan fasilitas AGRU yang terdapat di CPP (Central Processing Plant), sedangkan dalam Skenario-2 diasumsikan Separator dan fasilitas AGRU terletak di salah satu Wellhead Cluster. Sweet gas, Produced Water dan Condensate hasil proses dialirkan dengan pipeline menuju CPP. Biaya investasi untuk masingmasing skenario akan dibandingkan dengan menggunakan variasi bebas : tekanan parsial H2S, laju alir dan jarak antara Wellhead Cluster dengan CPP.Hasil penelitian menyarankan bahwa Skenario-2 lebih baik karena membutuhkantotal biaya investasi yang lebih kecil dibanding Skenario-1, kecuali untuk kondisi dimana laju alir maksimum 10 MMSCFD dan jarak antara Wellhead Cluster dengan CPP hingga 1 km, dimana Skenario-1 lebih baik dibandingkan dengan Skenario-2.

---

ABSTRACT

This study is about the influence of Wellhead Cluster scenario, Flowline and Acid Gas Removal Unit (AGRU) toward investment needed in developing new gas field. There are two scenarios, where in Scenario-1 it is assumed that gas from each Wellhead Cluster will go directly by Flowline to Separator and AGRU facility which is located in CPP (Central Processing Plant). Meanwhile in Scenario-2, it is assumed that Separator and AGRU facility are located in one of the Wellhead Clusters. Sweet gas, Produced Water and Condensate output from the process are delivered to CPP by pipeline. Investment cost for each scenario will be checked using free variation : H2S partial pressure, flow rate and distance between Wellhead Cluster and CPP.

The study which results that Scenario-2 is better then Scenario-1, because it requires less investment cost compared to Scenario-1, except for condition where maximum flow rate is 10 MMSCFD and distance between Wellhead Cluster to CPP is up to 1 km, then Scenario-1 is better than Scenario-2.;This study is about the influence of Wellhead Cluster scenario, Flowline and Acid Gas Removal Unit (AGRU) toward investment needed in developing new gas field. There are two scenarios, where in Scenario-1 it is assumed that gas from each Wellhead Cluster will go directly by Flowline to Separator and AGRU facility which is located in CPP (Central Processing Plant). Meanwhile in Scenario-2, it is assumed that Separator and AGRU facility are located in one of the Wellhead Clusters. Sweet gas, Produced Water and Condensate output from the process are delivered to CPP by pipeline. Investment cost for each scenario will be checked using free variation : H2S partial pressure, flow rate and distance between Wellhead Cluster and CPP.

The study which results that Scenario-2 is better then Scenario-1, because it requires less investment cost compared to Scenario-1, except for condition where maximum flow rate is 10 MMSCFD and distance between Wellhead Cluster to CPP is up to 1 km, then Scenario-1 is better than Scenario-2."