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天然气地球科学

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松辽盆地齐家—古龙凹陷青山口组泥页岩层段储层特征

陈彬滔，潘树新，方乐华，张庆石，李成刚，梁苏娟   

  1. (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)
  • 收稿日期:2015-04-08 修回日期:2015-07-10 出版日期:2016-02-10 发布日期:2016-02-10
  • 作者简介:陈彬滔(1985)，男，重庆云阳人，工程师，硕士，主要从事沉积学与非常规油气储层研究. Email:tobychencugb@foxmail.com.
  • 基金资助:

    中国石油股份公司重大专项(编号：2012E2603)资助.

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

Chen Bintao，Pan Shuxin，Fang Lehua，Zhang Qingshi，Li Chenggang，Liang Sujuan   

  1. （1.Research Institute of Petroleum Exploration and DevelopmentNorthwest(NWGI),PetroChina,Lanzhou 730020,China;
    2.Key Laboratory of Reservoir Description,PetroChina,Lanzhou 730020,China;
    3.Research Institute of Petroleum Exploration and Development,Daqing Oilfield Company,Daqing 163000,China;
    4.No.3 Oil Plant,Sinopec Northwest Company,Luntai 841604,China）
  • Received:2015-04-08 Revised:2015-07-10 Online:2016-02-10 Published:2016-02-10

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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”。

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

Abstract:

Organicrich shale was widely distributed in the Qingshankou Formation,QijiaGulong Sag,Songliao Basin,which shows enormous potential in unconventional oil/gas exploration.Based on core observation,thin section,wholerock Xray diffraction,argon ion polishingSEM 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(R O)was 0.62% 1.19%, which indicate the shale were at lowmature to mature evolution stage.Major reservoir spaces in the shale section include intergranular pores,intracrystalline pores,organic pores,dissolved pores,and microfractures.The abnormal overpressure in the shale section of the QingshankouFormation 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.

Key words: Shale reservoir, Tight reservoir, Deepwater reservoir types, Deepwater finegrained depositional system, Songliao Basin

中图分类号: 

  • TE122.2+21

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