天然气地球科学

• 非常规天然气 • 上一篇    下一篇

辽河坳陷东部凹陷沙三段页岩油气成藏地质条件

尉菲菲,张金川,张鹏,隆帅,卢亚亚,黄宇琪   

  1. 1.中国地质大学(北京)能源学院,北京 100083;
    2.海相储层演化与油气富集规律教育部重点实验室/页岩气勘查与评价国土资源部重点实验室,北京 100083
  • 收稿日期:2014-12-01 修回日期:2014-12-29 出版日期:2015-07-10 发布日期:2015-07-10
  • 通讯作者: 张金川(1964-),男,河南焦作人,教授,博士生导师,主要从事非常规油气、成藏机理、资源评价及盆地流体等研究及教学工作.E-mail:zhangjc@cugb.edu.cn.
  • 作者简介:尉菲菲(1989-),男,山东泰安人,博士研究生,主要从事储层评价、非常规油气勘探研究.E-mail:wlei_226@126.com.
  • 基金资助:

    国家自然科学基金项目(编号:41102088|41272167);全国油气资源战略选区调查与评价专项(编号:2009GYXQ-15);中国石油辽河油田项目“辽河油田页岩油气战略选区与评价”联合资助.

Accumulation Conditions of Shale Oil and Gas in Member 3 of the Shahejie Formation in the Eastern Sag of Liaohe Depression

WEI Fei-fei,ZHANG Jin-chuan,ZHANG Peng,LONG Shuai,LU Ya-ya,HUANG Yu-qi   

  1. 1.School of Energy,China University of Geosciences,Beijing 100083,China;
    2.Key Laboratory of the Ministry of Education of Marine Reservoir Evolution and Oil and Gas Accumulations,
    Key Laboratory of the Ministry of Land and Resources of Shale Gas Exploration and Evaluation,Beijing 100083,China
  • Received:2014-12-01 Revised:2014-12-29 Online:2015-07-10 Published:2015-07-10

摘要:

从辽河坳陷东部凹陷的构造演化入手,通过对沙三段页岩的沉积地质背景、地球化学特征、储集特征及含气性特征等方面分析页岩油气的成藏条件,初步探讨了辽河坳陷东部凹陷沙三段页岩油气的成藏模式,并优选出页岩油气的勘探有利区。结果表明:东部凹陷沙三段发育一套湖相暗色页岩,页岩厚度较大,一般介于100~500m之间|有机碳含量在0.1%~6%之间,平均值达2.91%;有机质热成熟度RO值较低,平均值为0.6%,属于低成熟—成熟有机质|储集空间以粒间孔和溶蚀孔为主,石英、碳酸盐类等脆性矿物含量较高,具有一定的脆性|页岩的含气性较好,等温吸附测试表明吸附气量在0.65~5.11m3/t之间,平均为2.32m3/t。通过页岩油气成藏条件多因素叠加法,认为北部的牛居—长滩洼陷和南部的驾掌寺—二界沟洼陷是东部凹陷沙三段页岩油气勘探有利区。

关键词: 页岩气, 辽河坳陷东部凹陷, 沙三段, 地球化学特征, 含气性, 有利区

Abstract:

Based on the shale sedimentary background,geochemical characteristics,reservoir characteristics and gas content etc.,we analyse the formation conditions of shale oil and gas and the reservoir forming pattern,and select the favorable exploration area.The results show that the thickness of member 3 in the study area is large,commonly between 100-500m.The organic carbon mass fraction is in the range of 0.1%-6% with an average of 2.91%.Thermal maturity of organic matter is low with an average value of 0.6%.The reservoir space is mainly inter-granular pore and dissolved pore.The brittle mineral content is high such as quartz and carbonate rocks,so it has certain fragility.Furthermore,the results of isothermal absorption show that shale has high performances of gas absorption,and the total gas content is 0.65-5.11m3/t,with an average value of 2.32%.Finally,through the multi-factors superposition method of shale oil and gas accumulation conditions,we believe the Niuju-Changtan subsag in the north and south of Jiazhangsi-Erjiegou subsag is a favorable area for oil and gas exploration in the Eastern Sag of Liaohe Depression.

Key words: Shale gas, Eastern Sag of Liaohe Depression, Member 3 of the Shahejie Formation, Geochemical characteristics, Gas content, Favorable area

中图分类号: 

  • TE122.3

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