摘要
为揭示影响相邻煤层气井组以及同一井组间产能差异控制因素,基于SZB煤层气一体化区典型相邻煤层气井组生产动态变化特征,探讨了产能类型、平均产气量和平均产水量等参数的差异性,并从地质控制因素、工程工艺控制因素和排采管理因素出发,详实剖析了资源条件、有利煤储层发育程度、井身质量、固井质量、压裂工艺和不同阶段排采制度对煤层气产量控制作用。结果显示:在煤层气资源条件相近情况下,煤储层非均质性和有利煤储层发育程度是影响相邻井组产量差异的内在主控地质因素;在保障井身结构合理、固井质量合格基础上,压裂改造效果是相邻煤层气井组产量差异的主控工程因素;不同生产阶段排采管理的科学性是主要管理因素。该观点不仅对煤层气井产量控制因素分析提供了理论依据,对煤层气田快速提产增效也有参考价值。
In order to reveal the controlling factors of productivity difference between adjacent coalbed methane well groups and the same well group,based on the production dynamic characteristics of typical adjacent coalbed methane groups in SZB block,the differences of productivity types,average gas production and average water production are discussed,and the detailed analysis is made from geological controlling factors,engineering process controlling factors and drainage management factors.The resource conditions and development degree of high quality coal reservoir,well bore quality,well cementation quality,fracturing technology and different stages of drainage system control the coalbed methane productivity.The results show that under the condition of similar coalbed methane resources,the heterogeneity of coal reservoir and the development degree of favorable reservoir are the internal main geological factors that affect the production difference of adjacent well groups;on the basis of ensuring reasonable well bore structure and qualified cementing quality,the fracturing effect is the main engineering factor of the production difference of adjacent coalbed methane groups;the difference of production management in different production stages is the main management factor.This view not only provides a theoretical basis for the analysis of the controlling factors of coalbed methane productivity,but also has a reference value for the rapid production increase of coalbed methane.
作者
郭广山
邢力仁
李娜
陈峥嵘
GUO Guang-shan;XING Li-ren;LI Na;CHEN Zheng-rong(New Energy Research Center,CNOOC Research Institute,Beijing 100028,China)
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2020年第9期1334-1342,共9页
Natural Gas Geoscience
基金
中海油科技攻关项目“柿庄北东部缓坡带排采制度优化与增产措施研究”(编号:YXKY-2019-ZY-02)资助。
关键词
生产特征
产能
控制因素
井组
SZB区块.
Production characteristics
Capacity
Control factor
Well group
SZB block
