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
张圣霞1
作者信息
- 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
- 折叠
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 m3/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.
Abstract
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 frac-turing 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 m3/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Key words
Sulige gas field/large-scale fracturing technology/composite fracturing fluid/proppant combination/fracture profile/complex fractures/production enhancement引用本文复制引用
基金项目
中国石油集团渤海钻探工程有限公司重大研发项目(2018ZD12K)
出版年
2024
NETL
NSTL
万方数据