岩性油气藏 ›› 2014, Vol. 26 ›› Issue (4): 44–49.doi: 10.3969/j.issn.1673-8926.2014.04.007

• 油气地质 • 上一篇    下一篇

周口坳陷谭庄凹陷下白垩统低孔低渗碎屑岩储层特征及成因分析

张琴1,朱筱敏1,刘畅1,季汉成1,陈祥2   

  1. 1.中国石油大学(北京) 地球科学学院,北京 102249; 2.中国石化河南石油勘探局,河南 南阳 473132
  • 出版日期:2014-08-15 发布日期:2014-08-15
  • 第一作者:张琴(1973-),女,博士,副教授,主要从事沉积储层方面的教学与科研工作。 地址:(102249)北京市昌平区府学路 18 号中国石油大学地球科学学院。 E-mail:zhangqin@cup.edu.cn。
  • 基金资助:

    国家自然科学基金项目“页岩气储层微观孔隙发育机制及其演变定量模拟”(编号:ZX20130157)和中国石油大学(北京)基本科研 业务基金项目“低孔、低渗碎屑储层成因机理研究———以谭庄凹陷下白垩统为例”(编号:KYJJ2012-01-29)联合资助

Characteristics and genesis of clastic reservoir with low porosity and low permeability of Lower Cretaceous in Tanzhuang Sag

ZHANG Qin1, ZHU Xiaomin1, LIU Chang1, JI Hancheng1, CHEN Xiang2
  

  1. 1. College of Geosciences, China University of Petroleum, Beijing 102249, China; 2. Henan Petroleum Exploration Bureau,Sinopec, Nanyang 473132, Henan, China
  • Online:2014-08-15 Published:2014-08-15

摘要:

根据岩心、薄片、扫描电镜等分析化验资料确定谭庄凹陷下白垩统储层平均孔隙度为 6.1%,平均渗透率为 10.5 mD,为低孔、低渗碎屑岩储层。 除巴 1 井外,其他各井从上部商水组向下到巴村组,随着埋藏深度增大,孔隙度和渗透率基本呈下降趋势。下白垩统储层质量主要受沉积条件、成岩作用及构造作用的影响。 较低的成分和结构成熟度、较强的压实作用和胶结作用以及较弱的溶蚀作用是导致储层低孔、低渗的根本原因,而构造作用形成的裂缝均被矿物充填,对储层物性改善不大

关键词: 蒙特卡罗法, 地质储量, 卡方检验, 敏感性分析

Abstract:

The average porosity and average permeability of clastic reservoir of Lower Cretaceous in Tanzhuang Sag are respectively 6.1% and 10.5 mD based on the data of cores, thin section, and scanning electron microscope, which means that the reservoir belongs to low porosity and low permeability reservoir. Porosity and permeability decrease from Shangshui Formation to Bacun Formation with depth getting deeper except in Ba 1 well. The reservoir properties of the Lower Cretaceous are mainly influenced by depositional conditions, diagenesis and tectonization. Low textural and compositional maturity, strong compaction and cementation and weak dissolution are composed of the essential and significant factors for the low porosity and low permeability, while fractures caused by tectonization mostly are filled by minerals as a result of little improvement of the reservoir properties.

Key words: Monte-Carlo method, OOIP, Chi-square test, sensitivity analysis

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