鄂尔多斯盆地延长世湖盆中部长6段储层成岩特征

张瑞, 王琪, 姚泾利, 李树同, 李小燕, 郝乐伟

doi:10.11764/j.issn.1672-1926.2010.06.890

天然气地球科学 >

2010 , Vol. 21 >Issue 6: 890 - 896

DOI: https://doi.org/10.11764/j.issn.1672-1926.2010.06.890

天然气地质学

鄂尔多斯盆地延长世湖盆中部长6段储层成岩特征

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1.中国科学院油气资源研究重点实验室，甘肃兰州 730000；
2.中国科学院研究生院，北京 100049；
3.中国石油长庆油田分公司勘探开发研究院,陕西西安 710018；
4.中国科学院资源环境科学信息中心/中国科学院国家科学图书馆兰州分馆,甘肃兰州 730000

张瑞(1978-)，男，河南南阳人，博士研究生，主要从事储层沉积学与储层地球化学研究.

收稿日期: 2010-03-29

修回日期: 2010-08-18

网络出版日期: 2010-12-10

基金资助

国家科技重大专项“大型油气田及煤层气开发”示范工程项目(编号：2008ZX05044； 2008ZX05008\|003\|04；2008ZX05025-006-01-01）联合资助

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Diagenetic Characteristics and Pore Evolution from High-quality Reservoirs of Yanchang Formation in the Middle of Ordos Basin

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1.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Lanzhou 730000,China; 
2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China；
3.Research Institute of Exploration and Development,Changqing Oil field Company,PetroChina,Xi′an 710021,China；
4.Scientific Information Center for Resources and Environment /Lanzhou Branch of National Science Library,Chinese Academy of Sciences,Lanzhou 730000,China

Received date: 2010-03-29

Revised date: 2010-08-18

Online published: 2010-12-10

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摘要

鄂尔多斯盆地华庆地区延长组长6段储层砂岩属于湖盆中部的砂质碎屑流成因，主要经历了压实作用、胶结与交代作用、溶蚀作用和烃类侵位等成岩作用，目前处于中成岩阶段的A期。研究区的主要孔隙类型为粒间溶孔、粒间孔隙和粒内溶孔,以粒间溶孔为主。孔隙演化整体上呈减小趋势，其中压实作用和胶结作用是孔隙减少的主要成岩作用，使原始孔隙度损失将近90%，是研究区长6段储层成为特低孔特低渗储层的主要因素；溶蚀作用和烃类侵位对孔隙具有建设性作用，其中溶蚀作用决定了华庆地区长6段优质储层的发育状况，产生的次生孔隙占原生孔隙的15.9%。

关键词： 鄂尔多斯盆地; 华庆地区; 延长组; 成岩作用; 储层评价

本文引用格式

张瑞, 王琪, 姚泾利, 李树同, 李小燕, 郝乐伟 . 鄂尔多斯盆地延长世湖盆中部长6段储层成岩特征[J]. 天然气地球科学, 2010 , 21(6) : 890 -896 . DOI: 10.11764/j.issn.1672-1926.2010.06.890

Abstract

The reservoir sandstones from Chang 6 oil-bearing interval of the Yanchang Formation in Huaqing area,Ordos basin,were the cause of sandy debris flow in the middle basin,which had experienced primarily the compaction,cementation and metasomatism,dissolution and the emplacement of hydrocarbons.And currently the sandstones ares in the diagenetic stage of A phase.Pore types of sandstones in the area were mainly intergranular dissolved pore,intergranular pore and intragranular dissolve pore,in which intergranular dissolved pore was primary.Porosity evolution decreasingly trended overall,in which compaction and cementation were major diagenesis reducing the original porosities of nearly 90%,and major factors of the studied area ultra-low permeability.However,dissolution and hydrocarbon emplacement played the constructive role of the porosity.Dissolution determined the development status of Chang 6 high quality reservoir in Huaqing,which generated secondary porosities for 15.9% of primary porosities.

Key words： Ordos basin; Huaqing area; Yanchang Formation; Diagenesis; Reservoir evaluation.

参考文献

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