ANALISIS PETROFISIKA UNTUK MENTUKAN POTENSI HIDROKARBON PADA SUMUR ELP-23 LAPANGAN PRABUMULIH MENGGUNAKAN METODE INVERSI

Abstract

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 m