浅层疏松砂岩气层损害评价方法研究及应用  

Study and Application of the Method for Evaluating Damage to Shallow Unconsolidated Sandstone Gas Formations

作　　者：马勇新 张立权 杨仲涵 许发宾 向雄 杨洪烈 刘喜亮 MA Yongxin;ZHANG Liquan;YANG Zhonghan;XU Fabin;XIANG Xiong;YANG Honglie;LIU Xiliang(CNOOC China Ltd.Zhanjiang Branch,Zhanjiang,Guangdong 524057;Division of Oilfield Chemistry,COSL,Zhanjiang,Guangdong 524057)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]中海油服油化湛江作业公司,广东湛江524057

出　　处：《钻井液与完井液》2021年第1期68-73,共6页Drilling Fluid & Completion Fluid

摘　　要：疏松砂岩油气层胶结性较差,很难钻取到柱状岩心,且常规油气层损害评价方法已不再适合于该类油气层的损害评价。从疏松砂岩气藏储层岩心组构特点出发,提出了一种适合疏松砂岩气层损害评价方法,通过对国内南海西部A、B气田现场使用的钻开液进行损害评价,室内评价结果与现场井油气试井结果一致,说明该方法评价结果模拟现场较为真实。Columnar cores are generally difficult to be obtained from unconsolidated sandstone formations because of poor formation cementation.Conventional methods for evaluating the damage of unconsolidated sandstone oil and gas reservoirs cannot be used to evaluate the degree of damage to the unconsolidated sandstone oil and gas reservoirs.A method for evaluating the damage to unconsolidated sandstone gas reservoirs has been presented based on the fabric characteristics of cores from unconsolidated sandstone gas reservoirs.Evaluation of the drilling fluids used in gas field A and gas field B in the west of South China Sea showed that the results of the new method coincided with the field well test results,indicating that the new method can be used to simulate field operation with high accuracy.

关 键 词：疏松砂岩 露头石英砂岩 气层损害评价方法 界限压力法 EZFLOW钻井液 

分 类 号：TE254[石油与天然气工程—油气井工程]