论文详情
柴达木盆地德令哈地区侏罗系成岩作用研究
断块油气田
2007年 14卷 第03期
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Title
Study on diagene sis of Jurassic reservoir in De lingha
area of Qaidam Basin
Authors
W u Lirong ,Huang Chenggang, HuangChangwu.
单位
1 长江大学地球科学学院, 湖北荆州434023; 2 中国石油勘探开发研究院西北分院, 甘肃兰州730020;
3 中国石油勘探开发研究院, 北京100083
Organization
GeoscienceCollege ofYangtze University,
Jingzhou 434023, China
摘要
柴达木盆地德令哈地区侏罗系勘探程度较低, 为了弄清其有利储层的分布规律,在野外地质踏勘、微观显微镜观察及分析化验的基础上, 认为这一地区重要的成岩作用类型有压实作用、胶结作用及溶解作用。其中压实作用是造成其岩石孔隙体积减小的重要因素; 早期的碳酸盐胶结作用不仅可以固定岩石骨架保存原生孔隙, 而且可以促进次生孔隙的发育, 当碳酸盐胶结物质量分数小于15% 时易产生有利的次生孔隙。
Abstract
Low degree explora tion is the actua lity of Delingha area in
Qa idam Basin. In order to find out the distribution ru les o f the
advantaged reservo irs in the area, this paper concludes that the
mi portant diagenesis types in the area is compaction, cementation
and dissolution based on field reconna issance, co re observation
and m icroscope analysis. Compaction has played an mi portant
ro le in pore reducing. Cementation in the early stage can not
only fix up the rock framework in o rder to conserve prmi ary
porosity, but a lso can mi prove genera tion of secondary pores if
the content of carbonate cem ents is lower than 15%.
Keywords:
Delingha area, cem enta tion, secondary
pores.;
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