油气地质

柴达木盆地北缘潜西地区古近系储层发育特征及主控因素

  • 李敏同 ,
  • 李忠权 ,
  • 麻成斗 ,
  • 段新国 ,
  • 李洪奎
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  • 成都理工大学“油气藏地质及开发工程国家重点实验室”
杨永剑,1983 年生,男,成都理工大学在读博士研究生,研究方向为沉积学及岩相古地理。地址:(610059)四川省成都市成都 理工大学沉积地质研究院。E-mail:ulixy@126.com

网络出版日期: 2010-12-15

基金资助

柴达木盆地北缘国家科技重大专项(编号:2008ZX05002-004)资助

Reservoir characteristics and controlling factors of Paleogene in Qianxi area in northern margin of Qaidam Basin

  • LI Mintong ,
  • LI Zhongquan ,
  • MA Chengdou ,
  • DUAN Xinguo ,
  • LI Hongkui
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  • State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China

Online published: 2010-12-15

摘要

依据钻井、测井资料,对岩心进行测试分析发现,潜西地区古近系储层主要成分为成熟度较低的岩屑长石砂岩和长石岩屑砂岩,次生溶蚀孔隙为储层的主要储集空间,包括溶蚀粒间孔、粒内溶孔及铸模孔等。该地区储层孔隙度平均为10.1%,渗透率平均为21.64 mD,属低孔、低渗储层,且非均质性强。储层发育受沉积相和成岩作用的双重影响,前者对储层的发育起宏观控制作用,在辫状河河道所发育的储层物 性相对较好;后者对储层的发育起决定性作用,压实作用和胶结作用破坏了储层的储集性能,溶蚀作用和 破裂作用改善了储层的储集性能。

本文引用格式

李敏同 , 李忠权 , 麻成斗 , 段新国 , 李洪奎 . 柴达木盆地北缘潜西地区古近系储层发育特征及主控因素[J]. 岩性油气藏, 2010 , 22(Z1) : 60 -65 . DOI: 10.3969/j.issn.1673-8926.2010.Z1.013

Abstract

Based on the drilling, logging data and core test analysis, it is concluded that the reservoir component of Paleogene in Qianxi area mainly are lithic arkose and feldspathic litharenite with lowmaturity, and the reservoir spaces mainly are secondary dissolved pore including intergranular dissolved pore, intragranular dissolved pore and casting pore. The average porosity of the reservoir is 10.1%, and the average permeability is 21.64 mD. The Paleogene reservoir is low porosity and low permeability reservoir with strong heterogeneity. The reservoir is influenced by sedimentary facies and diagenesis. Sedimentary facies plays a role in macro control of the reservoir development, and the reservoir developed in braided channel has relative good properties. Diagenesis plays a decisive role in the reservoir development. Compaction and cementation destruct the capacity of the reservoir, while denudation and cataclasis improve the performance of the reservoir.

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