Oil and gas fuel from unconventional types of reservoirs was the development of alternative sources in addition to oil and gas fuels from conventional type reservoirs that can be obtained to meet domestic needs. The development of unconventional oil and gas reservoirs has developed rapidly outside Indonesia, such as in North America and Canada. One type of unconventional oil and gas reservoir was obtained from shale rock reservoirs. Hydrocarbon shale produced from shale formations, both source from rock and reservoir. This unconventional hydrocarbon has a big potential to be utilized. In this study, an analysis of the development of unconventional oil and gas from Shale Hydrocarbons carried out in Indonesia. This research included the distribution of shale reservoir basins, the number of unconventional shale reservoir resources, factors affecting the development of unconventional oil and gas in shale reservoirs in Indonesia, efforts made by the government to promote exploration activities, exploitation of shale reservoirs in Indonesia, and existing regulations for non-conventional oil and gas. The development of unconventional oil and gas reservoir shale needed to be developed immediately and will attract investors to meet domestic needs for renewable energy needs. From the geological data obtained, there were 6 basins and 11 formations that analyzed for commercialization. Tanjung and Batu Kelau Formation was a prospect formation from 4 desired data categories. In terms of regulation, it still needed improvement to increase the interest of upstream oil and gas entrepreneurs in the unconventional oil and gas shale reservoir. Research in the field of unconventional oil and gas exploitation technology for hydrocarbon shale needed to be improved.
Hidrokarbon serpih merupakan sumber energi minyak dan gas bumi non-konvensional yang terperangkap dalam formasi batuan serpih kaya akan kandungan material organik, akan tetapi memiliki porositas dan permeabilitas yang sangat rendah. Penyelidikan ini memiliki tujuan untuk menjelaskan proses karakterisasi serpih Formasi Kelesa yang berpotensi sebagai pembawa hidrokarbon serpih berdasarkan perbedaan kondisi geologi, struktur, petrofisika, geokimia, dan geomekanika. Penyelidikan ini dilakukan pada Formasi Kelesa di Cekungan Sumatra Tengah, Provinsi Riau. Penyelidikan ini menggunakan data hasil analisis laboratorium geokimia, data log sumur, dan data seismik 2D. Data log sumur digunakan untuk analisis petrofisika yang menghasilkan nilai property batuan pembawa hidrokarbon serpih, yaitu kandungan serpih, TOC, dan indeks kegetasan. Data hasil analisis laboratorium geokimia digunakan untuk kalibrasi hasil analisis petrofisika. Interpretasi seismik dengan melakukan penarikan horizon Formasi Kelesa menghasilkan peta struktur kedalaman. Pemodelan statis property kandungan serpih, TOC, dan indeks kegetasan dilakukan dengan mengintegrasikan hasil interpretasi seismik dan analisis data sumur. Selain itu, analisis sejarah pengendapan atau burial history dilakukan untuk membuat pemodelan kematangan. Integrasi dari semua hasil pengolahan data menentukan daerah menarik (sweet spot) dari serpih Formasi Kelesa di daerah penyelidikan.Katakunci : Daerah menarik, Formasi Kelesa, hidrokarbon serpih, petrofisika.
Daerah penyelidikan terletak di Sub Cekungan Jambi, Cekungan Sumatra Selatan. Secara administrasi termasuk Kabupaten Tebo dan Sarolangun. Studi ini difokuskan pada karakteristik geokimia organik dan indeks kegetasan (BI) dari serpih Formasi yang berumur Eosen-Oligosen. Metodologi yang digunakan adalah hasil analisis laboratorium TOC, XRD dan petrofisika dari data log dan seismik. Berdasarkan data tersebut maka serpih yang terdapat di daerah penyelidikan mempunyai kecenderungan berpotensi sebagai sumberdaya migas nonkonvensional dengan kategori bagus. Dari hasil perhitungan volume sweetspot serpih ini diketahui volume SS_01 adalah 1.17 x 1012 ft2 dengan luas area 8.9 x 108 ft2 dan volume SS_02 adalah 5.01 x 1011 ft2 dengan luas area 4.21 x 108 ft2 .Kata kunci : Geokimia Organik, TOC, Indeks Kegetasan, Cekungan Sumatra Selatan, Eosen-Oligosen.
The aim of this study is to calculate the rifting and lifting phase of Neogene age in the Biak - Yapen Basin region, related to the prediction of an oil and gas trap zone based on the analogy of the surface measurement trajectory. The methodology used is the measurement of geological structures on the surface and in the data analysis using Delvaux, 1997 and Zoback, 2007 concept. Based on the structure measurement in outcrop, there are 78 stations along Biak Island and Supiori Island, which will be used and projected as an analogy to the offshore basin. Statistically in the archipelago shows that there are three times rifting phase domination candidates categorized as maximum intensity and a lifting phase candidates are also categorized as maximum intensity. There are three times rifting phase with movement direction, σ-3 is relatively horizontal, consisting of NE-SW direction with an intensity of 15.60% rifting aged Middle to Late Miocene, ENE-WSW direction with intensity 13.30% rifting aged Late Miocene to Pliocene and finally from the W-E direction with an intensity of 17.80% rifting aged Pleistocene. The three rifting phases are followed by sedimentation of carbonate rock from the Middle Miocene to the Pleistocene aged which consists of Napisendi Fm, Korem Fm, Wardo Fm, and Mokmer Fm. The lifting phase once occurred with the compressional direction, σ-1 is relatively horizontal, directed at W-E with an intensity of 21.20% lifting aged Pleistocene to Resen. This phase has elevated formations from the age of the Late Oligocene to the Pleistocene in the archipelago.
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