柴达木盆地德令哈地区侏罗系成岩作用研究  

Study on diagenesis of Jurassic reservoir in Delingha area of Qaidam Basin

作　　者：吴丽荣[1] 黄成刚[2] 黄昌武[3] 

机构地区：[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

出　　处：《断块油气田》2007年第3期12-15,共4页Fault-Block Oil & Gas Field

基　　金：中国石油天然气股份有限公司科技项目"柴达木盆地石油地质基础与新技术研究"(06-01A-02-02)资助

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。Low degree exploration is the actuality of Delingha area in Qaidam Basin.In order to find out the distribution rules of the advantaged reservoirs in the area,this paper concludes that the important diagenesis types in the area is compaction,cementation and dissolution based on field reconnaissance,core observation and microscope analysis.Compaction has played an important role in pore reducing.Cementation in the early stage can not only fix up the rock framework in order to conserve primary porosity,but also can improve generation of secondary pores if the content of carbonate cements is lower than 15%.

关 键 词：德令哈地区 胶结作用 次生孔隙 

分 类 号：TE312[石油与天然气工程—油气田开发工程]