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
网络出版日期: 2014-08-15
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
Online published: 2014-08-15
罗文生 , 孙立春 , 郑洪印 , 蒋百召 , 武静 . 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[J]. 岩性油气藏, 2014 , 26(4) : 44 -49 . DOI: 10.3969/j.issn.1673-8926.2014.04.007
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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