松辽盆地朝长地区葡萄花油层成藏模式及控制因素

doi:10.11743/ogg20170513

摘要/Abstract

摘要： 针对松辽盆地朝长地区葡萄花油层油气成藏模式及主控因素不清的难题，利用烃源岩评价、油源对比、疏导体系、油水关系、油藏类型以及油藏控制因素分析等技术方法，对葡萄花油层油气来源、成藏特征、主控因素和成藏模式进行了研究。结果表明：研究区内葡萄花油层原油主要来自西部的三肇凹陷和东部朝阳沟阶地局部地区青一段，还有一部分来自下伏扶杨油层；区内断裂可以分为油源断裂、疏导断裂和封闭断裂，其中疏导断裂在研究区中广泛分布；西北砂体主要为内前缘河道砂，东南部主要为外前缘席状砂，西北部砂体的储集性和物性好于东南部。综合分析认为，研究区油气成藏主要受烃源岩、油源断裂和砂体共同控制，成藏模式主要有“近源成藏”模式和“上倾成藏”模式两种。对朝长地区葡萄花油层油气成藏富集规律的研究，对下一步葡萄花油层确定勘探目标和储量预测具有指导意义。

关键词: 断裂, 砂体, 成藏模式, 葡萄花油层, 朝长地区, 松辽盆地

Abstract: To answer the questions concerning the hydrocarbon accumulation patterns and main controlling factors of Putaohua reservoirs in Chaochang area,Songliao Basin,we studied the hydrocarbon sources,accumulation features,main controlling factors as well as accumulation patterns of the reservoirs through source rock assessment,crude-source correlation,analyses of conduit systems,oil-water contact,and controlling factors of accumulation,and reservoir type identification.The results show that crude in the reservoirs are mostly from the first member of the Qingshankou Formation in Sanzhao sag in the west and Chaoyanggou terrace in the east.The underlying Fuyang oil-bearing layer also made some contribution.Faults in the area can be classified into three types:source rock-rooted faults,carrier faults and sealing faults,among which,the carrier faults dominate the area.Sandbodies are largely inner front channel sands in the northwest part,and outer front sheet sands in the southeast part,with the former having better storage capacity and physical properties than the latter.A comprehensive analysis comes to a conclusion that hydrocarbon accumulation in the area was gene-rally controlled by source rocks,source rock-rooted faults and sandbodies.There are mainly two types of accumulation pattern:near-source accumulation and updip accumulation. The study is meaningful in term of guiding the identification of future exploration targets and reserve estimation in Chaochang area.

Key words: fault, sandbody, accumulation pattern, Putaohua reservoir, Chaochang area, Songliao Basin

中图分类号:

TE122.1

常艳,刘大锰. 松辽盆地朝长地区葡萄花油层成藏模式及控制因素[J]. 石油与天然气地质, 2017, 38(5): 944-951. doi: 10.11743/ogg20170513 Chang Yan,Liu Dameng. Hydrocarbon accumulation patterns and their controlling factors of Putaohua reservoirs in Chaochang area,Songliao Basin[J]. Oil & Gas Geology, 2017, 38(5): 944-951. doi: 10.11743/ogg20170513

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