Analisis Petrofisika Untuk Mentukan Potensi Hidrokarbon Pada Sumur Elp-23 Lapangan Prabumulih Menggunakan Metode Inversi

Well Logging play an important role in the activities of exploration and exploitation of oil and gas. Well logging is a technique for obtaining subsurface data by using a measuring instrument that is inserted into the wellbore, to evaluate the formation, identification of the characteristics of rocks in the subsurface and petrophysical analysis. Study of petrophysical properties can be done with qualitative analysis (quick look interpretation ) and quantitative analysis ( calculation ) which will then be acquired hydrocarbon zones in the form of productive layer thickness and the depth of the wells. The research Field is located in Prabumulih on working area PT Pertamina EP Region Sumatra. well logging carried out ELP-23 at a depth of 1374,9528 – 2309,7744 m, which is divided into five zones based on hydrocarbon layer., zone 1 (one), 2 (two), 3 (three), 4 (four), and 5 (five). Where the data processed by using software Geoframe 4.4 with Inversion method . Cut-off value for hydrocarbon zones in the well is Vsh ≤ 27%, Φ ≥ 15%, Sw ≤ 75%. Research results on the well ELP-23 suggests that hydrocarbon zones in zone 3 (three), 4 (four), and 5 (five) which is the Talang Akar formations. Where the net pay thickness is zone 3: 47.50 m, zone 4: 5,17 m, zone 5: 17,34