收稿日期: 2009-10-23
修回日期: 2010-03-21
网络出版日期: 2010-06-10
基金资助
国家科技重大专项“大型油气田及煤层气开发”子专题(编号: 2008ZX05001-004-04)资助.
Favorable Conditions for Petroleum Accumulation by Paleogeomorphology before Deposition—Taking Lower Jurassic in Ziwuling Area, Ordos Basin as an Example
Received date: 2009-10-23
Revised date: 2010-03-21
Online published: 2010-06-10
赵敏, 王多云, 刘军锋, 孟祥宏, 李树同, 焦健 . 沉积前古地貌对油藏成藏的有利条件分析——以鄂尔多斯盆地子午岭地区下侏罗统为例[J]. 天然气地球科学, 2010 , 21(3) : 476 -481 . DOI: 10.11764/j.issn.1672-1926.2010.03.476
Materials (logging, seismic, core and etc.) are used to reconstruct the paleogeomorphology before the Jurassic deposition by the impression method (the total thickness of Yan 9 Member, Yan10 Member of Yanchang Formation and Fuxian Formation) in Ziwuling area, which shows diverse paleogeomorphic patterns, including high, slope, gully, szyrt and river valley. Based on the relationships between the paleogeomorphology and the formations of Yan 10, Yan 9, Yan 8 reservoirs, it can be inferred that reservoirs are mainly distributed in the slope near high and other relatively high zone. Favorable conditions for petroleum accumulation include the upward migration pathway of hydrocarbon from source rock of Yanchang Formation via the incised valley, the type and distribution size of reservoir sand bodies controlled by the slope, and the relatively high zone of later structural trap formed by differential compaction caused by slope mouth, beam between gullies, and monadnock.
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