Oil accumulation rules in deep zones of Upper Triassic Yanchang Formation in Ordos Basin

doi:10.7623/syxb201102008

Editorial office of ACTA PETROLEI SINICA ›› 2011, Vol. 32 ›› Issue (2): 243-248.DOI: 10.7623/syxb201102008

• Petroleum Exploration • Previous Articles Next Articles

Oil accumulation rules in deep zones of Upper Triassic Yanchang Formation in Ordos Basin

QU Hongjun 1 YANG Xianchao 2 CAO Jinzhou 2 FAN Yuhai 1 GUAN Liqun 1

Received:2010-07-19 Revised:2010-10-29 Online:2011-03-25 Published:2011-05-25

鄂尔多斯盆地上三叠统延长组深层油气聚集规律

屈红军 1 杨县超 2 曹金舟 2 范玉海 1 关利群 1

1西北大学大陆动力学国家重点实验室陕西西安 710069； 2延长油田股份有限公司陕西延安 716000

通讯作者: 屈红军
作者简介:屈红军，男，1967年5月生，1988年毕业于西北大学，2003年获西北大学博士学位，现任西北大学地质学系副教授，主要从事沉积学与成藏地质学研究。
基金资助:
国家科技重大专项（2008ZX05025-006）及国家重点基础研究发展规划（973）项目（2009CB219400）联合资助。

Abstract

Abstract:

A great breakthrough has been made in oil exploration activities in deep zones of the Yanchang Formation in the western and southern-centeral Ordos Basin in recent years, where several hundred millions geological oil reserves have been confirmed. Therefore, it is of great practical value to study oil accumulations in deep zones of the Yanchang Formation in the Ordos Basin. The present paper revealed oil accumulation rules in deep zones of the Yanchang Formation by systematically investigating interrelationships between source and reservoir rocks, oil migration and accumulation, etc. The study showed that accumulations in deep zones of the Yanchang Formation were dominated by lithologic reservoirs with source rocks above, the oil accumulation was characterized by “provinces controlled by source rocks, plays controlled by sedimentary facies, and positions controlled by pressure difference of reservoirs”, specifically, deep provinces of the Yanchang Formation occurred in areas adjacent to source rocks, plays mainly occurred in superimposed linked areas of delta front subfluvial distributary channels, and most of reservoirs in the Member Chang 8 occurred in areas with relatively high abnormal pressure under the background of low abnormal pressure difference between the Member Chang 7 and Member Chang 8.

Key words: Ordos Basin, Yanchang Formation, deep zone, province controlled by source, play controlled by sedimentary facies, position controlled by pressure difference

摘要：

最近几年鄂尔多斯盆地西部及中南部延长组深层的油气勘探取得了重大突破，探明石油地质储量数亿吨，研究鄂尔多斯盆地延长组深层油气聚集规律具有重要现实意义。通过鄂尔多斯盆地延长组深层源、储、运聚与油藏关系的系统分析，揭示了延长组深层油气聚集规律。研究结果表明，鄂尔多斯盆地延长组深层油藏主体为“上生下储”型岩性油气藏，油气聚集具有“源控区、相控带、压力差控位”的规律，具体为：延长组深层油区分布于近烃源岩区，已知油藏基本分布于三角洲前缘水下分流河道叠合连片区带，大多数长8油藏分布在长7油层组与长8油层组异常压力差低值背景下的相对高值区。

关键词: 鄂尔多斯盆地, 延长组, 深层, 源控区, 相控带, 压力差控位

QU Hongjun YANG Xianchao CAO Jinzhou FAN Yuhai GUAN Liqun. Oil accumulation rules in deep zones of Upper Triassic Yanchang Formation in Ordos Basin[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(2): 243-248.

屈红军杨县超曹金舟范玉海关利群. 鄂尔多斯盆地上三叠统延长组深层油气聚集规律[J]. 石油学报, 2011, 32(2): 243-248.

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Oil accumulation rules in deep zones of Upper Triassic Yanchang Formation in Ordos Basin

鄂尔多斯盆地上三叠统延长组深层油气聚集规律

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