砂岩储层次生孔隙定量统计的新方法

A NEW METHOD OF QUANTITATIVE STATISTICS OF SECONDARY PORES IN SANDSTONE RESERVOIRS

王恕一

Wang Shuyi

地矿部石油地质中心实验室, 无锡, 214151

Central Laboratory of Petroleum Geology, MGMR

次生孔隙是砂岩储集岩中重要的储某空间类型之一,利用岩石学方法识别次生扎隙并不困难,然而由于强烈的溶蚀作用,常常形成决生扎和原生孔连成一体的混合孔隙,使孔隙类型的定量统计造成困难。本文提出以实测孔隙度与岩石学统计相结合的方法,把作品集合为“强溶蚀”和“弱溶蚀”两类,分别统计,利用岩石学方法准确统计“弱溶类”样品,强溶蚀作用的影响以实测孔隙度求取,最终可取得较准确的定量统计资料。

Secondary pore is one of important types of reservoir space in sandstone reservoirs. It is not difficult to identify secondary pores with the petrographic method. however, it is when quantitative statistics of pore types are to be made, because secondary pores and primary pores were often connected to form into mixed pores resulted from intense corrosion. The paper proposed a method that combines the observed porosity and petrographic statistics, and clarified the samples into "intense corrosion" and "weak corrosion" types, so as to make their statistics respectively. The petrographic method was applied to get accurate statistics of the samples of "weak corrosion" type, while the affects of "intense corrosion" were determined on the basis of a observed porosity, and finally to obtain accurate quantitative statistical data.

https://doi.org/10.11781/sysydz199702188