岩性油气藏 ›› 2017, Vol. 29 ›› Issue (2): 77–86.doi: 10.3969/j.issn.1673-8926.2017.02.010

• 油气地质 • 上一篇    下一篇

二连盆地额仁淖尔凹陷阿尔善组致密储层特征及成岩作用

何明薇1,2, 朱筱敏1,2, 朱世发1,2, 魏巍1,2, 吴健平3, 王名巍3   

  1. 1. 中国石油大学(北京)地球科学学院, 北京 102249;
    2. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
    3. 中国石油华北油田分公司 勘探开发研究院, 河北 任丘 062552
  • 收稿日期:2016-11-18 修回日期:2016-12-18 出版日期:2017-03-21 发布日期:2017-03-21
  • 第一作者:何明薇(1992-),女,中国石油大学(北京)在读硕士研究生,研究方向为岩石学和储层地质学。地址:(102249)北京市昌平区府学路18号中国石油大学(北京)地球科学学院。Email:hmw92@163.com
  • 通信作者: 朱筱敏(1960-),男,教授,博士生导师,主要从事沉积储层和层序地层学方面的教学和科研工作。Email:xmzhu@cup.edu.cn。
  • 基金资助:
    中国石油华北油田分公司与中国石油大学（北京）校企合作项目“二连盆地特殊岩类储集层特征及其成因机制研究”（编号：HBYTZBZX-FWZB-2014-0084）

Tight reservoir characteristics and diagenesis of A'ershan Formation in Erennao'er Sag, Erlian Basin

HE Mingwei1,2, ZHU Xiaomin1,2, ZHU Shifa1,2, WEIWei1,2, WU Jianping3, WANG Mingwei3   

  1. 1. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
    2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
    3. Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China
  • Received:2016-11-18 Revised:2016-12-18 Online:2017-03-21 Published:2017-03-21

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摘要： 二连盆地各凹陷下白垩统岩石致密、类型复杂多样，但普遍具有较好的油气显示。利用岩心、薄片、阴极发光、X 射线衍射及扫描电镜等资料，对二连盆地额仁淖尔凹陷下白垩统阿尔善组致密储层特征和成岩作用进行了综合研究。结果表明，这些致密储层岩性主要为云（钙）质泥岩、云（钙）质沉凝灰岩、云（钙）质粉砂岩和钙质砂岩；储层物性较差，孔隙度平均为7.44%，渗透率平均为1.11 mD。其中，云（钙）质泥岩和云（钙）质沉凝灰岩主要发育于半深湖亚相和滨浅湖亚相，储集空间以晶间孔和裂缝为主；云（钙）质粉砂岩和钙质砂岩主要发育于扇三角洲前缘席状砂和水下分流河道等微相，储集空间主要为粒间孔、粒内孔和裂缝。研究区致密储层物性主要受成岩作用和沉积作用的控制，其中，压实作用和钙质、云质胶结作用是导致储层物性变差的主要因素，而溶蚀作用是改善储层物性的主要因素。

Abstract: The Lower Cretaceous reservoirs are characterized by tight and complex types of rocks and good oil shows in the sags of Erlian Basin. Based on the data of cores,thin sections,cathodeluminescence,X-ray diffraction and scanning electron microscope,the tight reservoir characteristics and diagenesis of the Lower Cretaceous A'ershan Formation in Erennao'er Sag were studied. The results show that the reservoirs are composed of dolomitic(calcareous)mudstone,dolomitic(calcareous)tuffite,dolomitic(calcareous)siltstone and calcareous sandstone. The reservoir properties are poor,with the average porosity and permeability of 7.44% and 1.11 mD, respectively. The dolomitic(calcareous)mudstone and dolomitic(calcareous)tuffite are mainly developed in semi-deep lacustrine and shore-shallow lacustrine,and the pore types are mainly intercrystal pores and fractures.Dolomitic(calcareous)siltstone and calcareous sandstone are mainly developed in sheet sand and subaqueous distributary channel in fan delta,and the reservoir spaces are mainly intergranular pores,intragranular pores and cracks. The tight reservoir properties are mainly controlled by diagenesis and sedimentation. Although compaction leads to the decrease of original pores,and calcareous and dolomitic cementation make reservoir properties significantly deteriorated,dissolution improves the reservoir properties.

中图分类号: 

  • TE122.2
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