考虑流量分配的水平井分段多簇压裂裂缝竞争扩展模拟  

Simulation of segmented multi-cluster fracturing fracture competitive propagation in horizontal wells considering flow allocation

作　　者：陈景华 朱海燕 赵鹏 陈世杰[1,2] 佘朝毅 郑马嘉[3] 王大江 陆朝辉[5] 唐煊赫 CHEN Jinghua;ZHU Haiyan;ZHAO Peng;CHEN Shijie;SHE Zhaoyi;ZHENG Majia;WANG Dajiang;LU Zhaohui;TANG Xuanhe(School of Energy,Chengdu University of Technology,Chengdu 610059,China;National Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering,Chengdu University of Technology,Chengdu 610059,China;Southwest Oil and Gas Field,PetroChina,Chengdu 610059,China;Petroleum Engineering Technology Research Institute,Jianghan Oilfield,SINOPEC,Wuhan 430035,China;Chongqing University,Chongqing 400044,China)

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]成都理工大学油气藏地质及开发工程全国重点实验室,四川成都610059 [3]中国石油西南油气田分公司,四川成都610059 [4]中国石化江汉油田分公司石油工程技术研究院,湖北武汉430035 [5]重庆大学,重庆400044

出　　处：《断块油气田》2025年第2期315-321,共7页Fault-Block Oil & Gas Field

摘　　要：大港油田沧东凹陷孔二段储层岩性复杂多变,非均质性强,在进行水平井分段多簇压裂时,裂缝之间存在竞争扩展现象,储层改造效果不佳。针对此问题,文中建立了可靠的水平井分段多簇压裂数值模型,对不同施工工艺下裂缝竞争扩展规律进行了系统研究。研究表明,数值模拟结果与现场施工参数有较好的一致性。在此基础上,考虑压裂液分配差异,对影响多裂缝竞争扩展的主控因素进行了探讨。结果发现:注液量的增大会抑制中间裂缝的发育,增大泵注排量和簇间距会促进裂缝均衡扩展;增大压裂液黏度会加剧裂缝之间的竞争扩展;减小段间距会加剧段间应力干扰,压裂段2和压裂段3的HF1压裂液进液受到抑制,中间裂缝受到的应力干扰减小。研究为水平井分段多簇裂缝扩展形态优化提供了参考。The lithology of Kong 2 Member reservoir of Cangdong Depression in Dagang Oilfield is complex and variable,with strong heterogeneity.During the segmented multi-cluster fracturing of horizontal wells,there is a phenomenon of competitive propagation between fractures,resulting in poor reservoir stimulation effect.To address this problem,this paper establishes a reliable numerical model for segmented multi-cluster fracturing of horizontal wells and systematically studies the competitive propagation laws of fractures under different construction techniques.The research shows that the established numerical simulation results have good consistency with the onsite construction parameters.On this basis,considering the allocation difference of fracturing fluid,the main controlling factors affecting the competitive propagation of multiple fractures are discussed.It is found that the increase of injection volume will inhibit the development of intermediate fractures,and the increase of pump displacement and cluster spacing will promote the balanced propagation of fractures.Increasing the viscosity of fracturing fluid will intensify the competitive propagation between fractures,and reducing the interval spacing will aggravate the stress interference between intervals,inhibiting the HF1 fracturing fluid inflow of fracturing interval 2 and fracturing interval 3,and the stress interference of intermediate fractures is reduced.This study provides a reference for the optimization of multi-cluster fracture propagation in horizontal wells.

关 键 词：水平井分段多簇压裂 应力干扰 位移不连续法 竞争扩展 数值模拟 

分 类 号：TE357[石油与天然气工程—油气田开发工程]