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Colorado School of Mines

1. Sihombing, Enry Horas. Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia.

Degree: MS(M.S.), Geology and Geological Engineering, 2019, Colorado School of Mines

The Paleogene synrift sediments in North West Java Basin area are viable and prolific petroleum plays and the exploration of the reservoir within these lacustrine strata likely be a source of future reserve additions, especially in Jatibarang Subbasin. However, they are exceptionally risky and still moderately understood in terms of their quality, extent, and connectivity. This study utilizes an extensive database: 22 wells, 216.408 m core, palynology-biostratigraphy data, 36 2D seismic lines (456 Km), 850 Km2 3D seismic cube to examine links between the structural evolution of the rift basins and the basins’ sedimentary fill architecture, which ultimately reveals the nature of Paleogene hydrocarbon systems in the Jatibarang Subbasin. The Jatibarang Subbasin was formed by the transtensional motion, started as a narrower compartmentalized basin in the Early Eo-Oligocene, turned as a wider depocenter in the Late Oligocene as the trantension angle is increased. The study defines environments of deposition across the basin that include: (a) alluvial fan and fan delta which is located proximal to border faults, turned distally as (b) braided river system (BRS) which is aligned subparallel – parallel with the splay fault, (c) fluvial plain, and (d) turbidite lacustrine. Poor reservoir facies and ineffective seal are two petroleum system elements that found to correspond with the dry wells in the study area. The distal fan facies tend to create poor reservoir facies due to the high frequency of the sand/shale intercalation and the simple shear deformation in the transtensional system creates topography inequality at the end of the rifting period, which consequents the diversity of maximum flooding events during the early post-rift and impacting the different quality of sealing facies. The understandings from this study conclude that the Jatibarang Subbasin still hold several remaining potentials, including future field development and exploration. The understanding about seal inequality across the basin, detail sedimentology variation and specific dimension, as well as a different order of structural orientation, are then found to be extremely helpful in revealing the future reservoir target, trapping integrity and future prospects in this basin Advisors/Committee Members: Wood, Lesli J. (advisor), Plink-Björklund, Piret (committee member), Anderson, Donna S. (committee member).

Subjects/Keywords: Rift Basin; Jatibarang; Transtensional

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sihombing, E. H. (2019). Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/173104

Chicago Manual of Style (16th Edition):

Sihombing, Enry Horas. “Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia.” 2019. Masters Thesis, Colorado School of Mines. Accessed August 24, 2019. http://hdl.handle.net/11124/173104.

MLA Handbook (7th Edition):

Sihombing, Enry Horas. “Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia.” 2019. Web. 24 Aug 2019.

Vancouver:

Sihombing EH. Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia. [Internet] [Masters thesis]. Colorado School of Mines; 2019. [cited 2019 Aug 24]. Available from: http://hdl.handle.net/11124/173104.

Council of Science Editors:

Sihombing EH. Form and fill of a transtensional rift basin : lower Talangakar Formation, Jatibarang subbasin, offshore NW Java, Indonesia. [Masters Thesis]. Colorado School of Mines; 2019. Available from: http://hdl.handle.net/11124/173104

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