东濮凹陷下第三系沙河街组砂岩的成岩背景及孔隙演化

作者以整体分析的思想方法,通过对成岩背景参数的选取、研究,揭示了东濮凹陷胡状集、文留两个地区不同构造环境中沙河街组砂岩各具特色的成岩作用与储层时空展布特征,研究结果表明,胡状集地区压实作用较弱,自生伊利石和铁白云石不发育,而高岭石发育,有利储层以原生孔隙为主且埋深较浅;而文留地区则压实作用强,铁白云石及沸石、石膏胶结发育,伊利石和绿泥石多见而缺乏高岭石,有利储层以次生孔隙为主且埋深较大。

SANDSTONE'SDIAGENETIC SETTING AND PROPERTIES OF POROSITY EVOLUTION OF EOGENE (SHAHEJIE FORMATION) IN DONGPU DEPRESSION , CHINA

It is considered that the combination properties and results of diagenetic variables in different structual environments can be revealed by selecting and studying the parameters of diagenetic setting . Research results show that the distinct sandstone diagenesis and spatio-temporal distribution of reservoir of the Shahejie Formation have resulted from different settings in Huzhuangji and Wenliu regions . In particular , the diagenesis of sandstone in Huzhuangji region possesses the following features : (l)weak compaction ; (2) less developed ferrodolomite and authigenic illite cement but more developed kaolinite ; (3) significant reservoirs characterized by the primary porosity and shallow burial . Whereas , in Wenliu region it dose : (1) strong compaction ; (2) rich in ferrodolomite , analcite , anhydrite , illite and chlorite , but poor at kaolinite ; (3) significant reservoirs characterized by the secondary porosity and deep burial .