松辽盆地齐家—古龙凹陷青山口组泥页岩层段储层特征  

Reservoir characteristics of mudstone(shale)interval in the Qingshankou Formation,Qijia-Gulong Sag,Songliao Basin,northeast China

作　　者：陈彬滔[1,2] 潘树新[1,2] 方乐华[1] 张庆石 李成刚[4] 梁苏娟[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油天然气集团公司油藏描述重点实验室,甘肃兰州730020 [3]中国石油大庆油田勘探开发研究院,黑龙江大庆163000 [4]中国石化西北油田分公司塔河采油三厂,新疆轮台841604

出　　处：《天然气地球科学》2016年第2期298-308,共11页Natural Gas Geoscience

基　　金：中国石油股份公司重大专项(编号:2012E-2603)资助

摘　　要：松辽盆地齐家—古龙凹陷青山口组富有机质泥页岩分布广泛,具有巨大的非常规油气勘探潜力。基于岩心观察、薄片、全岩X-射线衍射、氩离子抛光—环境扫描电镜、岩石热解以及有机碳分析资料,对青山口组泥页岩层段的储层特征进行了研究。结果表明：研究区的主要岩石类型为粉砂岩和低有机质页状粉砂岩,泥页岩中黏土矿物含量为6.1%~39.3%,总有机碳含量为0.74%~4.23%,有机质成熟度（RO）为0.62%~1.19%,属于低成熟—成熟演化阶段。泥页岩储层的主要储集空间为粒间孔、晶间孔、有机质孔、溶蚀孔以及微裂缝。青山口组泥页岩层段异常超压作用有助于抑制压实和胶结作用,促进溶蚀和天然裂缝形成,有利于形成泥页岩（致密）油勘探＂甜点区＂。Organic-rich shale was widely distributed in the Qingshankou Formation,Qijia-Gulong Sag,Songliao Basin,which shows enormous potential in unconventional oil/gas exploration.Based on core observation,thin section,whole-rock X-ray diffraction,argon ion polishing-SEM analysis,rock pyrolysis analysis,and organic carbon analysis,reservoir characteristics in shale section of the Qingshankou Formation have been studied.According to the study results,the lithology in the study area was dominated by siltstone and shaley siltstone with low organic matter.The clay mineral content of the shale was 6.1%-39.3%,total organic matter content was 0.74%-4.23%,and organic matter maturity（RO）was 0.62%-1.19%,which indicate the shale were at low-mature to mature evolution stage.Major reservoir spaces in the shale section include intergranular pores,intracrystalline pores,organic pores,dissolved pores,and micro-fractures.The abnormal overpressure in the shale section of the Qingshankou Formation was contributed to restrain the compaction and cementation,and promote development of dissolution and natural fractures,which were favorable to form ＂sweet spot＂in shale（tight）oil exploration.

关 键 词：泥页岩储层 致密储层 深水储层类型 深水细粒沉积体系 松辽盆地 

分 类 号：TE122.221[石油与天然气工程—油气勘探]