论文部分内容阅读
柴达木东部地区中、下侏罗统主要储层段砂岩的岩石类型以长石石英砂岩为主,还包括有岩屑石英砂岩、石英砂岩等;孔隙类型包括原生孔隙、各种溶蚀孔隙、晶间孔以及微孔和裂隙,物性总体上呈“低孔低渗”特征。根据岩石的孔隙度和渗透率,中值喉道半径、排驱压力、饱和中值压力、分选系数、变异系数、孔喉均值等孔隙结构参数以及碳酸盐胶结物的含量等9项参数,可以将研究区储层砂岩分成五类,其中大煤沟组第六段为最有利储集层段。
The rock types of sandstones in the middle and lower Jurassic major reservoirs in east Qaidam are mainly feldspar quartz sandstone, including lithic quartz sandstone and quartz sandstone. The types of pores include primary pores, various dissolved pores, Intergranular pores as well as micropores and fissures, physical properties were generally “low porosity and permeability” feature. According to the parameters of rock porosity and permeability, the median throat radius, displacement pressure, saturated median pressure, sorting coefficient, coefficient of variation, pore-throat average pore structure parameters and carbonate cement content of 9 parameters , The sandstones in the study area can be divided into five categories, of which the sixth segment of the Dameigou Formation is the most favorable reservoir segment.