煤矿安全2024，Vol.55Issue(11)：69-76,8.DOI:10.13347/j.cnki.mkaq.20240395
考虑割理的深煤层水平井多段分簇间距优化研究
Optimization of multi-stage cluster spacing in deep coal seam horizontal wells considering cleat
摘要
Abstract
In order to study the horizontal well multi-segment multi-cluster fracture extension in the deep coal reservoir where the cleat fissures are developed,a multi-segment multi-cluster fracture extension model is created based on the extended finite element and taking into account the inter-seam interference and the induced stress field.With the secondary development of pre-processing in Python language,a large number of approximately orthogonal cleat fissures were added into the model.The effects of cluster spa-cing,fracturing sequence and segment spacing on multi-fracture extension were analyzed,and the advantages and disadvantages of fracturing effect were verified by querying the number of fracture-communicating cutting groups.The simulation results show that when the cluster spacing is 20 m and the segment spacing is 40-45 m,the number of fracture communication cutting groups is relat-ively high,and the fracture length is optimal due to the small influence of inter-seam interference and induced stress field;at the as-pect of the influence of different fracturing sequences on the extension of multi-fractures,the fracturing effects are ranked from ex-cellent to poor:sequential fracturing>alternating fracturing>synchronous fracturing.The results of modeling and field application are in good agreement,with 96.5%for the second fracturing section and 93.4%for the third fracturing section.关键词
深煤岩储层/分段分簇压裂/割理裂隙/诱导应力/扩展有限元Key words
deep coal-rock reservoir/segmented cluster fracturing/cleat fissure/induced stress/extended finite element分类
矿业与冶金引用本文复制引用
车恒达,黄浩,陈明忠,孔祥伟,郭良林,张昊..考虑割理的深煤层水平井多段分簇间距优化研究[J].煤矿安全,2024,55(11):69-76,8.基金项目
中海油"十四五"规划重大资助项目(CCL2022RCPS0471RSN,CCL2022RCPS0038ESN) （CCL2022RCPS0471RSN,CCL2022RCPS0038ESN）
