涩北气田疏松砂岩气藏储集层堵塞机理及解堵技术应用  

Plugging Mechanism and Plugging Removal Technology for Unconsolidated Sandstone Gas Reservoirs in Sebei Gas Field

作　　者：廖丽 欧宝明 陈君 吴程 姜琪 倪勇 赵玉 LIAO Li;OU Baoming;CHEN Jun;WU Cheng;JIANG Qi;NI Yong;ZHAO Yu(PetroChina Qinghai Oilfield Company,Research Institute of Drilling and Production Technology,Dunhuang,Gansu 736200,China;PetroChina Qinghai Oilfield Company,Production and Operation Office,Dunhuang,Gansu 736200,China)

机构地区：[1]中国石油青海油田分公司钻采工艺研究院,甘肃敦煌736200 [2]中国石油青海油田分公司生产运行处,甘肃敦煌736200

出　　处：《新疆石油地质》2023年第1期100-104,共5页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2016ZX05015)。

摘　　要：涩北气田是柴达木盆地天然气开发的主要区域,具有多层、极易出砂、边水气藏等特点。随着气田的深入开发,因水锁伤害、黏土矿物水化膨胀运移、入井流体增多等因素导致储集层堵塞的气井不断出现,严重影响气井产能。结合涩北气田疏松砂岩气藏储集层泥质含量高的特点及出水加剧的现状,通过模拟实验,确定了储集层堵塞的主要影响因素为黏土矿物含量。以保护储集层为出发点,考虑针对性及经济性优选解堵液,形成了适用于涩北气田疏松砂岩气藏的化学解堵技术。现场应用表明,该解堵技术具有施工快、有效率高和有效期长的特点,解堵效果及应用前景较好。The Sebei gas field,a major natural gas producing area in the Qaidam basin,is characterized by multiple layers,easy sand production,and gas reservoirs with edge water. With the progress of the gas field development,reservoir plugging due to the factors such as water blocking damage,clay mineral hydration swelling and migration,and increased volume of the fluid entering wellbore occurs frequently in gas wells,which seriously affects well productivity. In the Sebei gas field,the unconsolidated sandstone gas reservoirs have high shale content and are suffering intensified water production. Through simulation experiment,it is determined that the influencing factor of reservoir plugging is clay mineral content. In order to protect the reservoirs,by selecting proper and economical plugging removal fluids,a chemical plugging removal technology has been developed for unconsolidated sandstone gas reservoirs in the Sebei gas field. Field application shows that this plugging removal technology is featured with fast operation,high efficiency and long validity,showing a good performance and application prospect.

关 键 词：柴达木盆地 涩北气田 疏松砂岩气藏 储集层 堵塞机理 化学解堵 影响因素 有效率 

分 类 号：TE348[石油与天然气工程—油气田开发工程]