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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

松辽盆地齐家地区高台子油层致密油分布及地质特征

施立志1,2，王卓卓1,2，张永生1   

  1. 1.中国地质科学院矿产资源研究所，国土资源部盐湖资源与环境重点实验室，北京 100037；2.大庆油田有限责任公司勘探开发研究院，黑龙江 大庆 163712
  • 收稿日期:2014-02-20 修回日期:2014-05-23 出版日期:2014-12-10 发布日期:2014-12-10
  • 通讯作者: 王卓卓(1978-)，女，河北石家庄人，高级工程师，博士后，主要从事沉积学与构造学研究. E-mail:wzz@petrochina.com.cn
  • 作者简介:施立志(1976-)，男，安徽安庆人，高级工程师，博士研究生，主要从事石油地质综合研究.E-mail:shilizhi@petrochina.com.cn.
  • 基金资助:
    国家重大科技专项课题“松辽北部岩性地层油气藏富集区带、目标优选与勘探技术应用”(编号:2011ZX05001-001-04)资助.

Distribution and Geological Characteristics of Tight Oil in Gaotaizi Oil Layer of Qijia Area,Songliao Basin

SHI Li-zhi1,2，WANG Zhuo-zhuo1,2，ZHANG Yong-sheng1   

  1. 1.MLR Key laboratory of Saline lake Resources and Environments,Institute of Mineral Resources, CAGS, Beijing 100037, China； 2.Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,Daqing 163712,China
  • Received:2014-02-20 Revised:2014-05-23 Online:2014-12-10 Published:2014-12-10

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摘要： 近年来，在松辽盆地齐家地区高三油层组、高四油层组发现了资源潜力较大的致密油。为了弄清这些致密油的分布规律及地质特征，通过应用各类地质、地球化学、试油、钻井、录井及分析测试数据，结合沉积学研究与数值模拟技术对致密油分布与地质特征进行了系统研究，结果表明致密油在平面上主要分布在齐家凹陷的中心与凹陷周边的斜坡、阶地部位，纵向上，主要分布在高三油层组、高四油层组。研究区发育青山口组一段、青山口二段+三段、嫩江组一段3套优质烃源岩,为致密油的形成提供了良好的物质基础。致密油储层沉积环境为三角洲相，致密油砂体类型有分流河道、河口坝、席状砂与浅湖砂坝，砂体在平面上分布稳定、范围广，砂体厚度较大，连续性好|致密油储层岩性主要为细砂岩、粉砂岩、泥质粉砂岩，部分储层砂岩中含有碳酸盐与泥质胶结物成分，储层物性较差，高三油层组、高四油层组平均孔隙度为8.5%，平均空气渗透率为0.4×10-3μm2；储层含油性表明研究区细砂岩、粉砂岩、泥质粉砂岩含油明显，泥岩基本见不到含油特征，泥岩中的粉砂质条带具有含油现象。储层储集空间以原生粒间孔及次生溶蚀孔隙为主，局部裂缝较发育，孔隙结构主要有粒间孔、粒间溶孔、微裂缝|三角洲前缘相储集岩体直接与烃源岩接触或者呈指状尖灭于湖相烃源岩之中或者与烃源岩互层,源、储配置关系好。这些认识对研究区的致密油勘探具有一定的指导作用。

关键词: 松辽盆地, 齐家地区, 非常规油气, 致密油

Abstract: In recent years, tight oil is found in G3 and G4 oil layers with large resource potential in the Qijia area of Songliao Basin. In order to find out the distribution of tight oil and geological characteristics, by application of various kinds of geology, geochemistry,testing,drilling, logging and analysis of test data, combining sedimentology study and numerical simulation technology, tight oil distribution and geological characteristics were studied. The results show that the tight oils are mainly distributed in the center of Qijia Depressions, slope and terrace around depressions in the plane, longitudinal, mainly in G3 and G4 oil layers. There are three sets of high-quality hydrocarbon source rocks in this area (k2qn1,k2qn2+3 and k2n1), providing a good material base for tight oil. Tight oil reservoir is deposited in delta facies sedimentary environment. The dense sand body types are distributary channel, mouth bar, sheet sand and shallow lake sand dam. The sand body is stable and widely distributed in the plane with good thickness and continuity. The lithology of tight oil reservoir is mainly fine sandstone and siltstone and pelitic siltstone, partly with carbonate reservoir sandstone and argillaceous cement composition. The reservoir physical properties are poor, with an average porosity of 8.5% for G3 and G4. The average air permeability of G3 and G4 is 0.4×10-3μm2. Oil in the reservoirs shows that the oil is found in the fine sandstone and siltstone and pelitic siltstone, there is no oil-bearing characteristics in the mudstone. Reservoir storage space is given priority to primary intergranular pore,secondary dissolution pore. Partial cracks are developed, and pore structures are mainly intergranular pore, intergranular dissolved pore and micro cracks. Reservoir rock of delta front facies in direct contact with the hydrocarbon source rocks or like a finger pointed out in the lacustrine source rocks or interbedded with hydrocarbon source rock, and the relation of source rocks and reservoir is good.The understanding can guide tight oil exploration in this area.

Key words: Songliao Basin, Qijia area；Unconventional hydrocarbon, Tight oil

中图分类号: 

  • TE122.1

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