鄯勒地区西山窑组成岩作用及储层评价  

Diagenesis and Reservoir Evaluation of Xishanyao Formation in Shanle Area

作　　者：崔立伟[1] 汤达祯[1] 王炜[2] 贾自力[2] 许浩[1] 李松[1] 陈晓智[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]吐哈油田分公司鄯善采油厂,新疆鄯善838202

出　　处：《天然气地球科学》2011年第2期260-266,共7页Natural Gas Geoscience

基　　金：国家自然科学基金青年基金项目(编号:40802027);国家重点基础研究发展计划("973")项目(编号:2009CB219604)联合资助

摘　　要：通过岩心观察、薄片鉴定、扫描电镜分析、X-射线衍射分析等手段,对鄯勒地区西山窑组碎屑岩储层的成岩作用进行了研究。西山窑组成岩阶段可分为早成岩B期和中成岩A期,中成岩A期又分为中成岩A1亚期和A2亚期,识别出压实作用、胶结作用、交代作用和溶解作用等4种成岩作用;强烈的压实作用和胶结作用是造成储层原生孔隙减少的主要原因,溶解作用形成的次生溶孔则有效地改善了储层的物性。综合储层沉积、成岩作用,可将西山窑组碎屑岩储层划分为3种类型,其中,Ⅰ类储层为低孔特低渗型,Ⅱ类储层和Ⅲ类储层为特低孔特低渗型。Here we studied the diagenesis characteristics and pore evolution of clastic reservoirs in the Xishanyao Formation of Shanle area by methods of core observation,slices arbitration,scanning electron microscopy and X-diffraction analysis.The diagenetic phases of the Xishanyao Formation included early diagenetic B stage and middle diagenetic A stage which was divided into A1 stage and A2 stage.The diagenesis can be divided into four types,including compaction,cementation,replacement and solution.The intense compaction and cementation were main reasons causing decrease in primary porosity,and the solution improved the reservoir physical properties effectively by developing the secondary porosity.Comprehensively considering the sedimentary and diagenesis on clastic reservoirs,the clastic reservoirs were divided into three categories,of which type Ⅰ was low porosity and the lowest permeability reservoir,and type Ⅱ and Ⅲ were the lowest porosity and permeability reservoir.

关 键 词：鄯勒地区 碎屑岩储层 成岩作用 储层评价 

分 类 号：TE122[石油与天然气工程—油气勘探]