银—额盆地查干凹陷下白垩统碎屑岩储层成岩作用及其对储层物性的影响

魏巍, 朱筱敏, 国殿斌, 蒋飞虎, 谈明轩, 吴陈冰洁, 张剑锋, 宋俭峰,

doi:10.11764/j.issn.1672-1926.2014.12.1933

天然气地球科学 >

2014 , Vol. 25 >Issue 12: 1933 - 1942

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.1933

天然气地质学

银—额盆地查干凹陷下白垩统碎屑岩储层成岩作用及其对储层物性的影响

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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.中国石化中原油田分公司石油勘探开发研究院，河南濮阳 457001

魏巍(1988-)，女，黑龙江大庆人，博士，主要从事储层沉积与成岩作用研究.E-mail:hunqiu8854@gmail.com.

收稿日期: 2014-02-08

修回日期: 2014-04-08

网络出版日期: 2019-09-18

基金资助

国家科技重大专项项目“岩性地层油气藏沉积体系、储层形成机理与分布研究”专题(编号:2011ZX05001-002);国家自然科学基金项目(编号:41272133)联合资助.

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Diagenesis and Its Controls on Reservoir Quality of Lower Cretaceous Clastic Rock Reservoir in Chagan Depression of Yin-E Basin

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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 Zhongyuan Oilfield,SINOPEC,Puyang 457001,China

Received date: 2014-02-08

Revised date: 2014-04-08

Online published: 2019-09-18

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摘要

大量岩石薄片、扫描电镜以及分析化验、测试资料表明，查干凹陷下白垩统碎屑岩储层主要发育岩屑长石砂岩和长石岩屑砂岩，处于中成岩A₁和A₂亚期。储层物性主要受控于成岩作用，机械压实作用在早成岩期对储层物性影响最大，其使粒间孔隙迅速减小、物性变差。胶结作用进一步导致物性变差。碳酸盐胶结物的溶蚀作用有效地改善了储层物性，形成次生孔隙发育带(2 100～2 800m)。火山喷发和构造运动也促进储层次生孔隙的形成。从浅层到深层，储层成岩程度逐渐增强。银根组主要发育早期胶结相，受机械压实和胶结作用影响，储集空间以原生孔为主，苏二段主要处于早期胶结和早期溶蚀相，储层物性较好，苏一段和巴二段主要发育中、晚期溶蚀相，次生孔隙发育，埋藏相对浅的苏一段物性更好，巴一段主要发育晚期胶结相，储层物性偏差。

关键词： 查干凹陷; 下白垩统; 成岩作用; 储层物性; 成岩演化; 孔隙演化

本文引用格式

魏巍, 朱筱敏, 国殿斌, 蒋飞虎, 谈明轩, 吴陈冰洁, 张剑锋, 宋俭峰, . 银—额盆地查干凹陷下白垩统碎屑岩储层成岩作用及其对储层物性的影响[J]. 天然气地球科学, 2014 , 25(12) : 1933 -1942 . DOI: 10.11764/j.issn.1672-1926.2014.12.1933

Abstract

Analyses of thin section (flakes) observation,SEM,and other reservoir lab data indicate that the Lower Cretaceous reservoir is mainly at mesogenetic stage A₁-A₂,including lithic feldspathic sandstone and feldspathic lithic sandstone.Diagenesis is the main controlling factor of reservoir physical properties.Compaction had a great influence on reservoir physical properties during the eogenetic stage,decreasing the reservoir porosity and destroying the reservoir properties.Cementation decreased the reservoir porosity further.Dissolution of carbonate cements created a secondary pore zone (2 100-2 800m),which improved the reservoir properties.Additionally,volcanic eruption and tectonic movement also resulted in the development of secondary pore.The diagenetic strength is increasing with the burial depth.K₁y developed early cementation facies dominated by primary pores.K₁s₂ mainly developed early cementation and early dissolution facies with good reservoir physical property.K₁s₁ and K₁s₂mainly developed mid- and late-dissolution facies with development of secondary pores.Compared to K₁s₂, K₁s₁ has better reservoir properties.With the deep burial depth, K₁s₁has poor reservoir properties developing late cementation facies.

Key words： Chagan Depression; Lower Cretaceous; Diagenesis; Reservoir characteristic; Diagenetic evolution; Pore evolution

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