Analisis tekanan bawah permukaan dilakukan untuk mendeteksi adanya overpressure dan permasalahan pada sumur yang akan dilakukan pengeboran berdasarkan data sumur eksplorasi. Pada operasi pengeboran yang dilakukan pada sumur A, B, C, D ditemukan berbagai masalah pengeboran yaitu kick, sloughing shale, dan pipe sticking yang dapat mengakibatkan tingginya Non Productive Time (NPT). Penelitian ini dilakukan untuk: pertama mengidentifikasi mekanisme overpressure di Tight Sand Gas dan Shale Gas pada Sub-Cekungan Jambi. Kedua melakukan prediksi tekanan pori menggunakan metode Bowers dan metode Drilling Efficiency and Mechanical Specific Energy (DEMSE) dan selanjutnya berdasarkan hasil analisis kuantitatif inversi seismik post-stack dapat memodelkan tekanan pori di daerah tersebut. Hasil analisis tekanan pori di sumur dan model tekanan pori 3D mengindikasikan bahwa top overpressure terjadi pada Formasi Gumai, kemudian berangsur-angsur turun mendekati tekanan hidrostatik pada Basement. Mekanisme overpressure diakibatkan oleh undercompaction, fluid expansion (kerogen maturation). 4. Formasi Gumai dan formasi Talang Akar merupakan batuan shale sehingga jenis lumpur yang baik digunakan adalah oil based mud (OBM). Batuan shale memiliki sifat elasticity sehingga rate of penetration (ROP) dan weight on bit (WOB) yang digunakan semakin besar.
The subsurface pressure analysis is used to detect the overpressure and problems in the well that will be drilled based on exploration well data. Various problems were found while drilling operations carried out on A,B,C,D wells, such as kick and pipe sticking which cause a high Non-Productive Time (NPT). This research is conducted to identify the mechanism of overpressure formation in tight sand gas and shale gas in the Jambi Sub-Basin. Furthermore, to predict pore pressure using the Drilling Efficiency and Mechanical Specific Energy (DEMSE) and Bowers methods. The final result will be a 3D pore pressure cube in the area based on quantitative analysis of post-stack seismic inversion. The results of the pore pressure analysis from the wells and the 3D pore pressure model indicate that top of overpressure occurs in the Gumai Formation, then it is decreasing gradually approaching the hydrostatic pressure on the Basement. The mechanisms of overpressure are caused by under compaction, fluid expansion (kerogen maturation). The Gumai Formation and Talang Akar Formation are shale rocks so the type of mud weight that is well used is oil based mud (OBM). Shale rocks have elasticity so that the rate of penetration (ROP) and weight on bit (WOB) that are used is getting bigger.
Seiring dengan perkembangan jumlah penduduk di dalam suatu wilayah pada suatu daerah pesisir akan berbanding lurus dengan kebutuhan air bersih. Namun hal yang biasa terjadi adalah terdapatnya ketidakseimbangan antara ketersediaan air dan kebutuhan air, untuk mencapai aspek tersebut di masa yang akan datang maka diperlukan penelitian lebih lanjut untuk mencapai target kebutuhan air di daerah pesisir. Tetapi air laut masih memiliki kandungan TDS (Total Dissolved Solid) dan salinitas yang cukup tinggi sehingga tidak layak pakai. Untuk mendesalinasi air laut harus menaikkan temperature air laut sampai kondisi di atas temperature saturasinya. Pada penelitian ini akan dibahas tentang bagaimana pengaruh tekanan kondenser dan konsentrasi kadar garam tehadap specific aquades production dan specific energy consumption untuk membuktikan seberapa mampu dan efisien metode throttling process dalam menghasilkan air akuades yang nantinya diharapkan dapat membantu keterediaan air untuk memenuhi kebutuhan air.
Along with the development of the population in a region in a coastal area will be directly proportional to the need for clean water. But the thing that usually happens is that there is an imbalance between water availability and water needs, in order to achieve this aspect in the future, further research is needed to achieve the water demand target in coastal areas. But sea water still has a high Ts (Total Dissolved Solid) content and salinity so it is not suitable for use. To desalinate sea water must increase the sea water temperature until conditions are above the saturation temperature. In this study, we will discuss how the influence of condenser pressure and salt concentration on specific aquades production and specific energy consumption to prove how capable and efficient the throttling process is in producing aquadest water which is expected to help provide water to meet water needs