西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (2): 79-83.

• 地质勘探 • 上一篇    下一篇

镇泾地区延长组油气成藏主控因素分析

李松1 胡宗全1 尹伟1 刘震2 潘高峰2   

  1. 1. 中国石化石油勘探开发研究院,北京 海淀 100083 2.“石油天然气成藏机理”教育部重点实验室.中国石油大学(北京),北京 昌平 102249
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-20 发布日期:2011-04-20

AN ANALYSIS OF THE MAIN CONTROLLING FACTORS OF THE RESERVOIR FOR-MATION OF UPPER TRIASSIC YANCHANG FORMATION IN ORDOS BASIN

LI Song 1 HU Zong-quan 1 YIN Wei 1 LIU Zhen 2 PAN Gao-feng 2   

  1. 1. Research Institute of Petroleum Exploration& Production,SINOPEC, Haidian, Beijing 100083, China; 2. Key Laboratory for Hydrocarbon Accumulation of Education Ministry, China University of Petroleum, Changping, BeiJing 102249, China)Journal of SouthwestPetroleum University, Vol. 33, No. 2, 79 – 83, 2011(1674 – 5086,in Chinese
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

摘要:

通过对鄂尔多斯盆地镇泾地区三叠系延长组的烃源岩条件、储层条件、储盖组合及圈闭类型等方面进行分析,认为镇泾地区延长组成藏条件优越。油气成藏控制因素及富集规律研究成果表明:构造演化控制着油气的调整方向,成藏期油气向 SE 方向运移,现今油藏向 NE 方向调整运移。烃源岩的有机质丰度分布控制着油气成藏,烃源岩有机质丰度 >1% 的地区,成藏条件优越。有利沉积相带控制油气富集,三角洲前缘亚相水下分流河道距离生烃灶近,砂体物
性好、厚度大,是石油富集的最有利场所。成藏期流体动力差控制着油气的运移方向,流体动力差越大的地方,油气越富集。断裂对油气富集起着运移通道的作用,断裂导致的增孔作用进一步影响着油气富集。

关键词: 鄂尔多斯盆地, 延长组, 油气成藏, 成藏条件, 主控因素, 油气富集

Abstract:

It is concluded that there are favorable conditions for oil accumulation in Zhenjing Area through the detailed analysis of many aspects of the Upper Triassic Yanchang Formation in Ordos Basin, such as hydrocarbon source conditions, reservoir conditions, reservoir-cap rock combination and the type trap. The research results of the controlling factors of oil reservoirs and the enrichment regularity indicate that the tectonic evolution controls
oil reservoir adjusting direction, old oil reservoir migrates to the north-east direction. Organic matter abundance distribution of hydrocarbon source rocks controls the oil accumulation. The area where the organic matter abun-
dance is more than 1 percent has favorable conditions for oil accumulation. The favorable deposit belts control the enrichment of oil and the underwater distributary channel of deltaicfront subfacies are close to hydrocarbon sources,
and have better sand body physical properties and a large thickness, making it a favorable site for the accumulation of petroleum. The dynamic reduction of fluid controls the migration direction of petroleum in reservoring time.
The bigger the dynamic reduction of fluid is, the more petroleum will be accumulated. The fracture serves as the migration channels for the hydrocarbon enrichment, and the porosity increasing caused by the fracture will further affect the hydrocarbon enrichment.

Key words: Ordos Basin, Yanchang Formation, reservoir formation, oil accumulation conditions, controlling factor, hydrocarbon accumulation

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