白音查干凹陷西部洼陷下白垩统储层特征及影响因素  

Characteristics and Influence Factors of Lower Cretaceous Reservoir in West Part of Baiyinchagan Sag

作　　者：张家政[1] 赵广珍[1] 刘喜顺[1] 刘源德[1] 

机构地区：[1]中原石油勘探局勘探开发科学研究院,河南濮阳457001

出　　处：《江汉石油学院学报》2000年第4期6-9,共4页Journal of Jianghan Petroleum Institute

基　　金：中国石化集团公司科技攻关课题(P99009)

摘　　要：白音查干凹陷西部洼陷下白垩统碎屑岩储层属干热陆相断陷湖盆近源高速冲积沉积 ,具有成分成熟度和结构成熟度低、重矿物成分复杂等特点。微观孔喉结构研究表明 ,该区储层孔隙类型多 ,孔隙、孔喉半径变化大 ,分选性、连通性差 ,为物性较差的低孔低渗及特低孔低渗型储层。导致这种储集层物性的主要原因是沉积环境及碎屑颗粒物理性质差 。The lower Cretaceous clastic reservoir rocks in the west part of Baiyinchagan sag consist of proximal alluvial fan in an arid terrigenous faulted depression lake, characterized by lower composition and textural maturities and by the complex composition of heavy minerals An investigation for microscopic pore throat structures shows that the reservoir is typical of many types of pores, obvious variation in radii of the pores and throats, and poor sorting and interconnection, and that the reservoirs have low and very low porosity and low permeability and poor physical properties The petrophysical properties of the reservoirs result from sedimentary environments and poor physical properties of clastic grains , and stronger diagenesis is a major factor decreasing porosity of rocks as well

关 键 词：碎屑岩储层 储层特征 沉积环境 成岩作用 早白垩世 白音查干凹陷 

分 类 号：P618.13[天文地球—矿床学]