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요약정보
大牛地气田下古生界气藏裸眼水平井分段酸压效果影响因素分析
Resource Type
Academic Journal
Authors
申贝贝
;
何青
;
陈付虎
;
张永春
;
徐兵威
;
李国锋
Source
天然气勘探与开发 / Natural Gas Exploration and Development
. 38(4):44-47
Subject
大牛地气田
碳酸盐岩
酸压
有效作用距离
Language
Chinese
ISSN
1673-3177
Online Access
Find it @ DONGA
초록
大牛地气田下古生界碳酸盐岩储层低孔、低渗,自然产能低.前期采用水平井多级管外封隔分段酸压改造,压后产气量递减速率较快,稳产效果差,严重制约着气藏的高效开发.结合水平井分段酸压工艺,考虑酸液在裸眼井段中的径向滤失,采用Willianms-Nierode酸液有效作用距离计算图版,分析酸液的有效作用距离.结果表明:酸液在水平井段内的径向滤失严重,滤失速率高达1.9 m/min,而酸液的有效作用距离仅为动态缝长的20%左右,酸液在裸眼井壁的径向大量滤失导致酸蚀主裂缝缝长过短是影响酸压效果的主要因素.
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