中文摘要：

川中地区磨溪气田下三叠统嘉陵江组第二段主要发育低孔、低渗的碳酸盐岩储层。含气层分布在嘉二段的中下部,其中以嘉二2B的孔喉配置较好,产液量最高。通过镜下薄片鉴定、岩心物性分析、流体识别等研究工作,发现气水分布因构造位置的不同而有明显的差异,其中以圈闭内的2个次高点邓家湾与步春沟储层物性最好,气水分异较彻底,产气量最高;且磨溪构造较陡的南翼在气藏开发中以产气为主,较缓的北翼产水较多。气水分布态势主要受储层物性控制与现今构造形态的影响,盖层封闭性仅起辅助作用。

英文摘要：

Layer 2is located in the Lower Triassic Jialingjiang Formation（Jia-2）of the Moxi gas field in the central area of Sichuan Basin.There mainly develop carbonate rock reservoirs with low-porosity and low-permeability.The gas-bearing interval is distributed over the middle and lower parts of Member Jia-2,meanwhile,the highest liquid producing capacity and good configuration of the pore throat is in Member Jia-22 B.Through analyzing the microscopic thin sections,the drilling core physical property,and identifying fluids and other researches,the authors find that the different structural locations cause an obvious difference in the distribution of gas and water.In this area there is the best reservoir physical property,the highest gas yield and the more thorough gas/water differentiation in Dengjiawan and Buchungou.During the exploitation of the gas pool,the steeper south of the Moxi structure mainly produces gas,relatively the flat north has higher water production rate.The gas and water distribution trend is mainly controlled by the reservoir properties and thecurrent structural form;the enclosed property of the cover only plays a subsidiary role.