西南石油大学学报(自然科学版) ›› 2026, Vol. 48 ›› Issue (1): 12-22.DOI: 10.11885/j.issn.1674-5086.2025.09.15.06

• 海上大型压裂船技术专刊 • 上一篇    下一篇

海上油田限流压裂多簇裂缝扩展规律实验研究

许杰1,2, 王允海1,2, 张彬奇1,2, 赵康佳1,2, 徐延涛3   

  1. 1. 中海石油(中国)有限公司天津分公司, 天津 滨海新区 300459;
    2. 海洋油气高效开发全国重点实验室, 北京 朝阳 102209;
    3. 中海油田服务股份有限公司, 天津 滨海新区 300459
  • 收稿日期:2025-09-15 发布日期:2026-03-09
  • 通讯作者: 徐延涛,E-mail:xuyt4@cosl.com.cn
  • 作者简介:许杰,1980年出生,男,汉族,山东日照人,教授级高级工程师,从事钻完井技术与管理工作。E-mail:xujie@cnooc.com.cn
    王允海,1984年生,男,汉族,山东郓城人,高级工程师,主要从事海上钻完井技术及管理等方面的工作。E-mail: wangyh6@cnooc.com.cn
    张彬奇,1979年生,男,汉族,陕西咸阳人,高级工程师,博士,主要从事海上钻完井技术研究。E-mail:zhangbq2@cnooc.com.cn
    赵康佳,1999年生,男,汉族,河北保定人,助理工程师,主要从事海上钻完井技术研究。E-mail:zhaokj3@cnooc.com.cn
    徐延涛,1983年生,男,汉族,山东莱州人,高级工程师,主要从事储层改造技术研究及推广工作。E-mail: xuyt4@cosl.com.cn
  • 基金资助:
    中国海洋石油集团有限公司“十四五”科技重大项目(KJGG2022, KJGG2022-0704)

An Experimental Study on Multi-cluster Fracture Propagation Laws in Offshore Oilfield Limited-entry Fracturing Processes

XU Jie1,2, WANG Yunhai1,2, ZHANG Binqi1,2, ZHAO Kangjia1,2, XU Yantao3   

  1. 1. CNOOC China Limited, Tianjin Branch, Binhai New Area, Tianjin 300459, China;
    2. State Key Laboratory of Offshore Oil and Gas Exploitation, Chaoyang, Beijing 102209, China;
    3. China Oilfield Services Limited, Binhai New Area, Tianjin 300459, China
  • Received:2025-09-15 Published:2026-03-09

摘要: 多级限流压裂技术是提高渤中25-1油田低渗储层产能的最有效方法之一,然而当储层特征与限流压裂工艺参数共同影响时,多簇裂缝的扩展机理尚不清楚。为此,基于大尺寸真三轴压裂模拟实验平台,开展目标层位相似物性人工岩石的多簇裂缝扩展规律实验研究,分析了射孔簇间距、簇数量、水平应力差等因素对多簇裂缝扩展形态的影响规律。结果表明,簇间距增加对岩石起裂压力影响小,但会减弱裂缝间干扰,促使多簇裂缝均匀扩展;射孔簇数的增加会减弱岩石塑性变形对裂缝扩展的阻力,增大裂缝扩展规模;水平应力差小于6 MPa时,多簇裂缝呈现横向缝与纵向缝交错扩展的形态;压裂液排量与黏度升高可增加裂缝内净压力,多簇裂缝形态更复杂。研究成果为低渗储层限流压裂工艺参数优化提供了参考。

关键词: 限流压裂, 真三轴模拟, 多簇裂缝, 低渗透储层, 海上油田

Abstract: Multi stage limited-entry fracturing is one of the most effective methods to improve the production capacity of low-permeability reservoirs in the Bozhong 25-1 Oilfield. However, when reservoir characteristics and flow limiting fracturing process parameters jointly affect each other, the mechanism of multi cluster fracture propagation is still unclear. Based on a large-scale true triaxial fracturing simulation experimental platform, we conduct experimental research on the multi cluster fracture propagation law of artificial rocks with similar physical properties in the target layer. The influence of factors such as perforation cluster spacing, cluster number, and horizontal stress difference on the multi cluster fracture propagation state is analyzed. The results indicate that increasing the spacing between clusters has little effect on the initiation pressure of rocks, but it weakens the interference between cracks and promotes the uniform expansion of multiple clusters of cracks; the increase in the number of perforation clusters will weaken the resistance of rock plastic deformation to crack propagation and increase the scale of crack propagation; when the horizontal stress difference is less than 6 MPa, multiple clusters of cracks exhibit a staggered expansion of transverse and longitudinal cracks; the increase in fracturing fluid displacement and viscosity can increase the net pressure inside the fracture, and the morphology of multiple clusters of fractures becomes more complex. This study provides a reference for optimizing the parameters of flow limiting fracturing technology in low-permeability.

Key words: limited-entry fracturing, true triaxial simulation, multi-cluster fractures, low-permeability reservoirs, offshore oilfield

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