贾爱林,唐海发,韩永新,吕志凯,刘群明,张永忠,孙贺东,黄伟岗,王泽龙
Jia Ai-lin,Tang Hai-fa,Han Yong-xin,Lv Zhi-kai,Liu Qun-ming,Zhang Yong-zhong,Sun He-dong,Huang Wei-gang,Wang Ze-long
摘要: 库车坳陷深层碎屑岩气田是近年来塔里木盆地天然气勘探开发的热点,该类气田具有储量规模大、埋藏深、高温高压、区块间裂缝发育差异大、边底水普遍存在等特点。气藏非均匀水侵导致气井产能快速下降,严重制约气田开发效果,是目前气田高效开发面临的普遍难题。从静态气水分布、微观水侵机理和动态水侵评价入手,系统建立了气水分布描述、水侵规律和控水开发技术对策为一体的静动态评价技术。研究认为,库车坳陷深层大气田气水分布受基质物性和缝网发育共同控制,气水分布模式可划分为两类:薄气水过渡带型(含基质物性好型和裂缝特别发育型两个亚类)和厚气水过渡带型。气水分布和裂缝发育的差异性,直接导致了气田水侵部位与水侵动态特征的不同,表现为3种水侵类型:边底水整体抬升侵入型、边底水沿微细裂缝带锥进型和边底水沿大裂缝纵窜型。基于不同气水分布模式及水侵动态,提出了构造高部位布井避水、降速控压控水和边部水淹井强排等开发技术对策,为塔里木盆地库车深层大气田的高效开发和调整提供技术支撑,并为国内同类气田的开发提供借鉴。
中图分类号:
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