川东碳酸盐岩储层非均质模型

HETEROGENOUS MODELS OF CARBONATE RESERVOIRS IN EAST SICHUAN

强平 曾伟 陈景山 黄继祥

Qiang Ping Zeng Wei Chen Jingshan Huang Jixiang

川东铁山、雷音铺构造嘉陵江组二段二亚段储层非均质性迥异。前者孔隙度分布不均匀且相差悬殊,储层密度及分层系数高,孔隙层呈带状分布,隔层不稳定,白云岩段所占比例大;后者孔隙层呈透镜状分布,储层密度及分层系数低于前者,隔层稳定。二者高孔隙段位于上部,孔隙层横向连通性都较好,隔层岩性均为膏质白云岩。网格化后建立的储层非均质模型显示,它们的嘉陵江组二段二亚段上部孔隙层均较发育,而下部则极不发育,铁山构造呈层状,横向连通性较透镜状分布的雷音铺构造为好。经检验与模型预测结果相吻合。

It is obvious that the reservoir heterogeneity of the second submember of the second member of the Jialingjiang Formation in Tieshan and Leiyinpu structures in east Sichuan differs greatly.The reservoir porosity of the Tieshan structure isn't distributed evenly,reservoir density and stratification coefficient are high,the pores are in zonal distribution,the confining bed of the reservoir is not stable.As for the reservoir of the Leiyinpu structure,the pore layer is in lensing distribution,reservoir density and stratification coefficient are lower than that of Tieshan structure,its confining bed is stable.Pore sections of the both reservoirs are in the upper parts with good lateral connection,the confining beds are gypsodolomits.The meshed heterogenous models of the reservoirs indicate that they match well with the actural reservoirs.

10.11743/ogg19980306