Volume 20 Issue 4
Dec.  2014
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MA Liang-tao, LI Shi-xiong, 2014. HYDROCARBON ACCUMULATION MODEL AND FUTURE EXPLORATION IN NORTHWEST SABAH BASIN. Journal of Geomechanics, 20 (4): 404-412.
Citation: MA Liang-tao, LI Shi-xiong, 2014. HYDROCARBON ACCUMULATION MODEL AND FUTURE EXPLORATION IN NORTHWEST SABAH BASIN. Journal of Geomechanics, 20 (4): 404-412.

HYDROCARBON ACCUMULATION MODEL AND FUTURE EXPLORATION IN NORTHWEST SABAH BASIN

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  • Received: 2014-06-22
  • Published: 2014-12-01
  • Guided by hydrocarbon geological theory, through typical reservoir dissecting, it identifies the features of Northwest Sabah Basin reservoir. The result shows that three different hydrocarbon accumulation patterns can be built based on the research for characteristic of structure, sedimentary formation and petroleum geology. They are lithologic, stratigraphic and rollover anticline type, respectively. The basin tectonic evolution involved rift, compression and inverse stage, depression stages and it developed four Cenozoic formations: Stage Ⅰ, StageⅡ, StageⅢ, StageⅣ. Mudstones and shales in the StageⅣ are the main source rocks. The pretty reservoir is provided by the Stage ⅠVA Lower Sandstone Unit, Stage ⅣC, ⅣD and ⅣE Upper Sandstone Unit and Stage ⅣC/ⅣD slump turbidite fan. Three reservoir-seal combinations, called lower, upper, deep-water turbidite fan combinations, are identified in basin. It builds three hydrocarbon accumulation models, named Updip sandstone pinchout, Unconformity and Rolling anticline type which distribute in different tectonic area in this basin. The fundamental conditions of hydrocarbon accumulation are analyzed. It shows that hydrocarbon source rocks and reservoir contacting each other in the plane and superimposing in the space provides favorable conditions for hydrocarbon migration and accumulation. Based on the above analysis, it suggests that stratigraphic reservoir in Inboard belt and lithologic reservoir in Outboard belt will be the future exploration targets for basin.

     

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