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All Journal Indonesian Journal Of Energy And Mineral Jurnal Polimesin
Suranta, Bambang Yudho
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Automotive Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analysis of Scale Saturation Index (SSI), Scale Formation Rate, and Scale Formation Time Based on Geothermal Production Well Head Pressure at Well "X" Sofyan, Akhmad; Aka, Hari Sumantri; Suranta, Bambang Yudho; Ratasya, Safira Maura Aldira
Indonesian Journal of Energy and Mineral Vol. 1 No. 1 (2021): IJoEM, Vol 1, No 1, 2021
Publisher : Politeknik Energi dan Mineral Akamigas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.166 KB) | DOI: 10.53026/IJoEM/2021/1.1/15

Abstract

Well “X” merupakan salah satu sumur produksi panas bumi yang memproduksikan fluida dua fasa yaitu uap dan brine. Brine inilah yang biasanya membawa zat-zat yang dapat membentuk scale seperti Silica, Calcite dan Sulphide. Scale pada sumur produksi dapat mengurangi produksi secara signifikan karena mampu menghambat aliran fluida di dalam sumur. Hal itulah yang terjadi pada Well “X”. Parameter terpenting dalam pembentukan scale adalah Scale Saturation Index (SSI). Bila SSI > 1, maka fluida dalam kondisi supersaturated dan pengendapan silica dimungkinkan terbentuk. Pembentukan scale akan meningkat seiring dengan penurunan temperatur dan kenaikan pH akibat flashing. Sehingga laju pembentukan scale dan lama waktu pembentukan scale dapat dihitung secara matematis. Data yang diperlukan dalam analisa ini adalah data hasil produksi Well “X” (Output Curve) dan data sampel scale Well “X”. Untuk menghitung SSI dilakukan perbandingan antara konsentrasi silica dalam larutan dengan kelarutan amorphous silica pada kondisi yang sama. Sedang kan untuk menghitung laju pembentukan scale dan lama waktu pembentukan scale adalah densitas silica, kelarutan quartz pada temperatur reservoir, larutan amorf pada temperatur flashing dan salinitas. Dari hasil analisa yang dilakukan didapatkan bahwa endapan silika tidak akan terbentuk pada WHP yang telah digunakan. Apabila dilakukan analisa Trial and Error diantara didapatkan bahwa nilai SSI ? 1 berada pada tekanan 2.3 bar a atau 18.08 psia. fgSedangkan untuk analisa laju dan lama waktu pembentukan scale, pada tekanan WHP 7.81 bar a atau 114.64 psig merupakan yang paling baik karena laju pembentukan scale yang tidak terlalu besar yaitu sekitar 1.56 inch/ tahun dan waktu pembentukan scale sebesar 25% adalah yang lebih lama yaitu 1.12321 tahun.
Evaluation Of Category III Overhead Tools Inspection Rig X PT. BMS Suranta, Bambang Yudho; Rahman, Muhammad Hafiz; Sofyan, Akhmad
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4223

Abstract

Overhead tool inspection is an important process in the oil and gas well drilling and maintenance industry. In harsh and hazardous environments, it is important to regularly monitor the physical condition and functionality of overhead tools. The use of overhead tools in the oil and gas industry has the advantage of lifting and moving heavy loads easily and safely. However, the use of heavy equipment also carries the risk of dangerous work accidents. The methodology in this research involves problem identification, literature review, research design, data collection, interpretation, analysis, and findings. The discussion emphasizes the meticulous inspection required for overhead tools, exemplified through the evaluation of traveling block, hook block, crown block, elevators, and elevator links. Each inspection, guided by API standards, ensures compliance, identifies potential hazards and prevents incidents in the inspection of overhead tools, various methods are used to ensure accurate inspection results and reduce the risk of failure during operation. This inspection involves techniques such as visual inspection and Non-Destructive Test (NDT) to test each overhead tools component which is guided by API SPEC 8A, API RP 8B and also API SPEC 8C. The main objective is to ensure that every aspect of the overhead tools has been carefully inspected and produces accurate inspection results. Thus, the risk of failure when inspecting overhead tools can be significantly reduced.The results indicate that the overhead tools inspected at PT. BSM meets API SPEC 8C standards. However, crucial findings, such as defects in crown block bearings and elevator safety pin issues, underscore the need for immediate attention. The conclusion emphasizes the importance of swift action to maintain safety and prevent further damage.
Co-Authors Aka, Hari Sumantri Akhmad Sofyan Luh Putu Ratna Sundari Rahman, Muhammad Hafiz Ratasya, Safira Maura Aldira