研究论文

库车坳陷克拉苏构造带致密砂岩气储层物性特征

  • 范俊佳 ,
  • 柳少波 ,
  • 张喜 ,
  • 郑永平 ,
  • 刘瑞兰 ,
  • 李秀丽
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  • 1. 中国石油勘探开发研究院, 北京 100083;
    2. 中国石油集团盆地构造与油气成藏重点实验室, 北京 100083;
    3. 中国五矿集团公司, 北京 100010;
    4. 新疆油田公司开发公司, 克拉玛依 834000
范俊佳,博士,研究方向为油气成藏,电子信箱:lannyfan@163.com

收稿日期: 2015-04-23

  修回日期: 2015-11-27

  网络出版日期: 2016-04-28

基金资助

中国石油天然气集团公司重大科技项目(2014A-0214);国家油气重大专项(2011ZX05003)

Tight sandstone gas reservoir properties of Kelasu-structural belt in Kuqa-depression

  • FAN Junjia ,
  • LIU Shaobo ,
  • ZHANG Xi ,
  • ZHENG Yongping ,
  • LIU Ruilan ,
  • LI Xiuli
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  • 1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;
    3. China Minmetals Corporation, Beijing 100010, China;
    4. Development Company of Xinjiang Oilfield, Karamay 834000, China

Received date: 2015-04-23

  Revised date: 2015-11-27

  Online published: 2016-04-28

摘要

在库车坳陷克拉苏构造带大北地区地质研究的基础上,利用显微镜观测、激光共聚焦显微扫描、高压压汞分析及孔渗测试等方法,研究了致密砂岩气储层物性特征。结果表明,库车坳陷的致密砂岩气储层孔隙类型以槽型孔、溶蚀孔为主;致密砂岩气储层排驱压力一般在5 MPa以上,孔隙分选性差,孔喉半径较小;致密砂岩气储层孔隙度小于5%时,孔隙度与渗透率之间的相关性较差,表现为孔隙度低而渗透率高,推断是微裂缝的发育提高了砂岩的渗透率;致密砂岩气储层岩石类型以长石岩屑质石英砂岩为主,胶结作用以方解石胶结为主,裂缝改造作用明显。

本文引用格式

范俊佳 , 柳少波 , 张喜 , 郑永平 , 刘瑞兰 , 李秀丽 . 库车坳陷克拉苏构造带致密砂岩气储层物性特征[J]. 科技导报, 2016 , 34(7) : 123 -128 . DOI: 10.3981/j.issn.1000-7857.2016.07.012

Abstract

Based on the geological research of Kelasu structural belt in Kuqa depression, we analyze tight sandstone gas reservoir properties of Dabei area by using microscope and laser scanning confocal microscope (LSCM) observation, mercury-injection capillary pressure (MICP) testing, and porosity and permeability testing. The results show the followings. The major pore types in tight sandstone gas reservoirs of Dabei area are slot pores and solution pores; Expulsion pressure of tight sandstone in the study area is generally above 5 MPa, with poor pore sorting and small pore throat radius; When the sandstone reservoir porosity is less than 5%, the correlation between porosity and permeability is weak, with small porosity and high permeability, which may be resulted from the contribution of micro-fractures in tight sandstone. The major rock type in Dabei gas field is feldspar lithic quartz sandstone, and it is dominated by calcite cementation. Besides, tight sandstone reservoir shows obvious fractures reconstruction.

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