摘要
东坪1区块基岩气藏属构造控制的底水块状气藏,基岩内幕裂缝发育特征复杂,地质条件特殊,储层非均质性强。随着气田开发的不断深入,气藏水侵严重,产能递减快,气藏水侵趋势未能得到根本控制。深化地质认识,分析东坪1区块气藏储层特征,确定出气藏具有“平面分区、纵向分带”的特点。运用水封物质平衡法计算单井水侵参数,以动静结合的方式研究气藏水侵规律,通过水侵规律研究与优化生产工艺相结合,完善并调整气藏整体治水方向,调整后的气藏日排水量大幅提升,削弱气藏内水体能量和底水的水侵速度,水封气得到不同程度的释放,实现部分停躺气井自喷生产和气井产气量的增加。研究成果对基岩气藏的水侵预防、识别、治理具有指导作用,可为尖北、昆特等同类型基岩气藏中后期开发提供借鉴与参考。
The Dongping 1 block bedrock gas reservoir belongs to a structurally controlled bottom water block gas reservoir.The development characteristics of internal fractures in the bedrock are complex,the geological conditions are special,and the reservoir heterogeneity is strong.With the continuous deepening of gas field development,gas reservoir water invasion is severe,production capacity is decreasing rapidly,and the trend of gas reservoir water invasion has not been fundamentally controlled.This paper deepens geological understanding,analyzes the reservoir characteristics of Dongping block 1 gas reservoir,and determines that the gas reservoir has the characteristics of“plane partitioning and vertical zoning”.Using the water seal material balance method to calculate the water invasion parameters of a single well,the water invasion pattern of a gas reservoir is studied through a combination of dynamic and static methods.By combining water invasion pattern research with optimization of production processes,the overall water control direction of the gas reservoir is improved and adjusted.After adjustment,the daily drainage volume of the gas reservoir is significantly increased,weakening the water energy and bottom water invasion speed in the gas reservoir,and the water seal gas is released to varying degrees,realizing flowing production for partial shutdown gas wells and an increase in gas well production.The results provide guidance for the prevention,identification and control of water invasion of bedrock gas reservoir and provide reference for the development of similar bedrock gas reservoir in the later stage.
作者
房晶媛
马鸿礼
曾丽
张影
王秋保
刘拴仪
孙智伟
FANG Jingyuan;MA Hongli;ZENG Li;ZHANG Ying;WANG Qiubao;LIU Shuanyi;SUN Zhiwei(Gas Production Plant 3 of Qinghai Oilfield CNPC,Dunhuang,Gansu,736202,China;PetroChina Southwest Oil and Gasfield Chuandongbei Operating Company,Dazhou,Sichuan,636164,China)
出处
《天然气与石油》
2023年第3期103-110,共8页
Natural Gas and Oil
基金
中国石油天然气股份有限公司科技重大专项“柴达木盆地老气区控水稳气及新气区高效开发技术研究”(2016E-0106GF)。
关键词
基岩气藏
储层特征
水侵规律
Bedrock gas reservoir
Reservoir characteristics
Water invasion pattern
