MINISTRY OF EDUCATION AND CULTURE UNIVERSITAS GADJAH MADA POSTGRADUATE PROGRAM OF FACULTY OF ENGINEERING POSTGRADUATE PROGRAM STUDY OF GEOLOGICAL ENGINEERING
| Main Authors: | , KHEMERA, DOUK, , Dr. Sugeng Sapto Surjono, ST, MT. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/134423/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=76835 |
Daftar Isi:
- Ngrayong Sandstone Formation is one of the productive reservoir in Indonesia both East Java basin and Northeast Java basin (Madura onshore and offshore). This research comprehensively focuses on the fundamental reservoir properties from surface outcrop data such as porosity (�) and permeability (K), texture (grain size, grain sorting, and grain shape) and geological conditions such as lithofacies, and depositional environment from lithological log. The purpose of study is to give the fundamental understanding about characteristics of Ngrayong Sandstone in Western Part of Madura Island and that can be used as a pieces of information in preliminary exploration of hydrocarbon. This research, lithofacies can be divided into 7 different lithofacies such as heterolithic sandstone facies (facies A), carbonaceous shale facies (facies B), cross-laminated sandstone facies (facies C), laminated mudstone facies (facies D), upper fan turbidites facies (facies E), bioclastic carbonate facies (facies F), and mixed siliciclastic-carbonate facies (facies G). These 7 lithofacies are further categorized into 2 depositional settings, tidal-dominated shallow shelf (FA1) and lower continental slope (FA2). There are 6 rock types such as sandy micrite, lithic arenite, greywacke, mudstone, allochemic mudrock, and wackstone. Lithic arenite is composed by grain supported, moderately sorted, angular to subrounded, medium silt to very coarse grain sand size. Greywacke is comprised matrix supported, poorly to moderately sorted, and angular to subrounded, fine silt to coarse grain sand size. Both rock types are deposited in upper fan turbidite facies (lower continental slope) the porosity and permeability value significantly ranges from 34.15 to 34.73% and 209 to 273mD, respectively. However, sand micrite derived from facies A and C (tidaldominated shallow shelf) is composed by matrix supported, poorly to moderately sorted, and angular to subrounded, fine silt to coarse grain sand size with porosity and permeability value derived from petrophysic analysis ranging from 18.23 to 30.56% and 1.22 to 7.04mD, which is quite good in quality. Indeed these sandstone can be viably considered as target for hydrocarbon exploration in Western Part of Madura Island