大型压裂技术在苏里格气田开发中的优化应用  

Optimization and application of large-scale fracturing technology in development of Sulige gas field

作　　者：张圣霞 ZHANG Shengxia(The Second Ceological Brigade of Hebei Coal Ceology Bureau(Hebei Dry Hot Rock Research Center),Xingtai,Hebei 054001,China)

机构地区：[1]河北省煤田地质局第二地质队(河北省干热岩研究中心),河北邢台054001

出　　处：《油气井测试》2024年第4期31-36,共6页Well Testing

基　　金：中国石油集团渤海钻探工程有限公司重大研发项目“苏里格合作区块大型压裂工艺技术研究”(2018ZD12K)。

摘　　要：为实现苏里格区块难采储量的有效动用,对以往大型压裂技术进行优化升级,压裂液体系由胍胶交联冻胶压裂液升级为“滑溜水+线性胶+胍胶压裂液冻胶”变黏度复合压裂液,支撑剂选用中密度高强度40/70目+20/40目陶粒组合,通过裂缝支撑剖面模拟和优化压裂施工参数,在保障施工安全的前提下,设计施工排量可满足8.0~9.0 m 3/min,形成了适合苏里格气田大型压裂技术。现场应用表明,大型压裂技术采用大排量、大液量、大砂量造复杂裂缝,加大了储层的渗透率,增加了气体可动区域,用液强度平均增大99%,加砂强度平均增大97%,日产气平均增加101.3%,取得了较好的增产效果,为后续该类区块的开发起到较好的借鉴和指导作用。To effectively produce the challenging reserves in the Sulige block,previous large-scale fracturing technologies were optimized and upgraded.The fracturing fluid system was improved from guar gum crosslinked gel to a variable viscosity composite fracturing fluid consisting of“slickwater+linear gel+guar gum crosslinked gel”.A combination of medium-density,high-strength 40/70 mesh and 20/40 mesh proppants was selected.By simulating fracture support profiles and optimizing fracturing parameters,the designed pumping rates,ensuring operational safety,can meet the requirements of 8.0~9.0 m 3/min,forming a large-scale fracturing technology suitable for the Sulige gas field.Field applications demonstrate that using high pump rates,large fluid volumes,and substantial proppant quantities in large-scale fracturing creates complex fractures,enhancing reservoir permeability and increasing the mobile gas area.The fluid intensity increased by an average of 99%,proppant intensity by 97%,and daily gas production by 101.3%,achieving significant production enhancement.This provides valuable reference and guidance for the development of similar blocks.

关 键 词：苏里格气田 大型压裂技术 复合压裂液 组合支撑剂 裂缝剖面 复杂裂缝 增产效果 

分 类 号：TE357[石油与天然气工程—油气田开发工程]