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All Journal LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI (LPMGB)
Bagus Adhitya
Teknik Geologi Universitas Jambi

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PEMODELAN FASIES PENGENDAPAN FORMASI BAONG BERDASARKAN DATA LOG SUMUR DAN SEISMIK PADA LAPANGAN “AGN” SUB-CEKUNGAN ARU CEKUNGAN SUMATRA UTARA Attania Alifah; Hari Wiki Utama; Bagus Adhitya
Lembaran publikasi minyak dan gas bumi Vol 58 No 3 (2024)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.58.3.1699

Abstract

Formasi Baong Sub Cekungan Aru Cekungan Sumatra Utara. Pada tengah-tengah formasi terdapat lensa lensa batupasir halus serpihan. Formasi ini dinamakan Besitang River Sand dan Sembilan Sand, yang keduanya merupakan reservoir yang produktif dengan berumur Miosen Tengah hingga Atas. Bagian bawah formasi ini merupakan batuan sumber hidrokarbon yang bermigrasi akibat adanya struktur diapir. Penekanan batuan sedimen yang jenuh akan air kemudian menekan hidrokarbon dan terperangkap pada lapangan batupasir yang terdapat di tengah-tengah formasi. Tujuan dari penelitian ini untuk mengetahui kondisi geologi pada cekungan daerah penelitian, distribusi fasies dan pemodelan fasies. Dengan menggunakan metode bawah permukaan, yaitu metode mengumpulkan dan menganalisis data sekunder bawah permukaan. Penentuan fasies dilakukan dengan analisis elektrofasies, data log sumur, dan data seismik. Hasil akhir berupa kondisi geologi, persebaran fasies dan pemodelan fasies.
Analisis Tekanan Pori dan Mekanisme Pembentukan Overpressure Menggunakan Data Open Hole Log Sub Cekungan Jambi, Cekungan Sumatra Selatan Hari Wiki Utama; Bagas Adith Setyo Wicaksono; Bagus Adhitya
Lembaran publikasi minyak dan gas bumi Vol 59 No 1 (2025)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.59.1.1757

Abstract

Field X is one of the oil and gas production fields in the Jambi Sub-Basin. This study analyzes subsurface pore pressure using drilling and logging data. Subsurface zones generally have normal and abnormal zones. Abnormal zones are also called overpressure. Determining overpressure is important in the field of drilling hazards such as determining the weight of drilling mud. Determining overpressure is done to anticipate loss or kick. Accurate and appropriate analysis in determining overpressure makes well drilling operations in the oil and gas industry more efficient, safe and effective. In this study, there are three wells in field X with values of pore pressure of the BGS-1 well ranging from 338.6-3541 psi measured from 238 m SSTVD to a depth of 2489.91 m SSTVD. The value of the pore pressure of the BGS-2 well ranges from 403.8-3459 psi measured from 283.9 m to a depth of 1921 m SSTVD and the value of the pore pressure of the BGS-8 well ranges from 853-3455 psi measured from 600 m to a depth of 1783 m SSTVD. The overpressure mechanism in Field X occurs due to the loading mechanism or disequilibrium compaction. This is in accordance with the geological conditions of the Gumai formation which is in the transgression phase dominated by clay lithology causing an increase in pore pressure due to the inability of fluids to exit the rock during compaction.
Co-Authors Attania Alifah Bagas Adith Setyo Wicaksono Hari Wiki Utama Hari Wiki Utama