靖边气田富水区扩大原因及控水措施  

The Expanding Reasons and Water Control Methods of Water-Rich Area in Jingbian Gas Field

作　　者：魏虎[1] 孙卫[1] 晏宁平[2] 刘舵[2] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [2]中国石油股份长庆油田分公司第一采气厂,陕西靖边718500

出　　处：《吉林大学学报（地球科学版）》2010年第5期1014-1019,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家科技支撑计划基金项目(2007BA17B00)

摘　　要：靖边气田马五气藏富水区的产水气井数目和产水量增长迅速,其面积不断扩大,已经严重影响了气藏开发。在将马五1气藏划分为富水区、水侵区和气区范围的基础上,从原始气水分布、储层物性、微观孔隙结构和气藏平面压力差异等方面研究富水区扩大的主要原因。结果表明:原始条件下,气水分布是富水区扩大的基础;储层物性差异是富水区扩大的潜在原因;储层微观特征反映水体储存和运移能力;因开发不均衡导致的平面压力不平衡是富水区扩大动力。提出3种控水采气方法:气井在控制水侵的压差下生产;排水采气工艺需与气井类型相适应,并确保其压差满足正常生产的需要;采取'内排外控'、'以排为主'与'区块压力控制'相结合的开发政策。The quantity of the water production and the number of water producing wells of water-rich blocks of Ma5 gas reservoir in Jingbian gas field increase rapidly,with an expanding water-rich area,so it damages the exploitation of the gas reservoir seriously.Based on classifying the gas reservoir as water-rich region,water invaded region and gas region,the reasons of expanding the water body in four aspects and the methods to control water in three ways are discussed and proposed.The original gas-water distribution is the basis for the expansion of water production areas.The difference of reservoir properties is the potential cause of water-rich regions expanding.The storage and transport capacity of water bodies is determined by the characteristics of micro-pore structure.Under the imbalance of formation pressure,which caused by exploration,water flows from water regions to gas regions.To control water and produce gas,three ways are proposed.Make sure various types of well operating in the proper drawdown pressure.The types of gas wells should fit recovering gas and draining water,the drawdown pressure should be ensured to meet the well normal production.The development strategy of ＂Draining water inside and keeping pressure outside＂,＂Taking drainage as key measure＂,＂Controlling the balance of block pressure＂ is proposed.

关 键 词：富水区 储层 物性 微观孔隙结构 控水采气 靖边气田 

分 类 号：P618.13[天文地球—矿床学]