Main Controlling Factors on Shallow Hydrocarbon Accumulation of Wuliji Tectonic Zone, Chagan Depression
详细信息
- 责任者：Shi Dahai (China University of Petroleum ; Beijing 102249 ; China) ; Chen Qingtang
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2013
- 卷期：20(3)
- 关键词：构造带 ; tectonic zones ; 成藏模式 ; pool-formed model ; 内蒙古 ; Inner Mongolia
- 页码：p.321-323,328
- 图表：illus., 16 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
In recent years,shallow ordinary heavy oil reservoir had been detected on the top of volcanic rocks in Wuliji tectonic zone,Chagan Depression.Oil source analysis indicated that the crude oil of oil reservoir was mainly from melanocratic mudstone of deep Bayingebi Formation.By analyzing hydrocarbon accumulation factors of shallow reservoir,it was known that the later tectonic inversion of Maoxi fault had developed favorable conducting system,and crude oil of early native reservoir in deep structural zone has migrated to shallow layer,which was the main controlling factor of shallow hydrocarbon accumulation.Moreover,the types of sedimentary facies of shallow structure are mainly fan dalta and braided river facies,with reservoir developed,which became favorable reservoir condition for petroleum enrichment.A large set of mudstones developed in overlying Wulansuhai Formation has formed regional cap rock,which provides favorable sealing condition for the formation of shallow reservoir and creates the hydrocarbon accumulation pattern with lower source rock and upper reservoir.
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