大庆石油地质与开发2024，Vol.43Issue(6)：98-105,8.DOI:10.19597/J.ISSN.1000-3754.202307031
疏松砂岩储层油井岩石扩容增产技术及其应用
Rock dilation stimulation technique for production wells in unconsolidated sandstone reservoirs and its application
摘要
Abstract
Aiming at challenges of fast production decrease of unconsolidated sandstone reservoirs and difficulties in stabilizing production by stimulation techniques,a new rock dilation technique for heavy oil SAGD development is applied in production wells stimulation areas of China's offshore oilfields.The mechanism of rock dilation in pro-duction wells in unconsolidated sandstone reservoirs is understood by both macroscopic and microscopic methods,and field tests of 2 wells are carried out for the first time in China,with study in perspective of production wells'rock dilation and stimulation technique and key parameters.The results show that well rock dilation in unconsolidat-ed sandstone reservoir mainly has 2 mechanisms including the formation of shear and tensile fracture zones and near-wellbore reverse plug removal.Among 4 technical steps of rock dilation including in-situ stress testing,in-situ stress preprocessing,dilation zones expansion and dilation zones inversion,attention should be paid on dilation pressure,dilation radius,dilation frequency,and supporting parameters for dilation inversion.After the operation of 2 experimental wells,Well P-B7H1 has fluid production increased from 213.7 m3/d to 405.2 m3/d and formation porosity increased from 1.6%to 2.0%,and Well E-A9H has fluid production increased from 236.7 m3/d to 510.0 m3/d and average permeability increased from 386.2×10-3 μm2 to 808.0×10-3 μm2.This technique can be used for production wells stimulation in unconsolidated sandstone reservoirs and has broad application prospect,provid-ing new idea for stimulation techniques in oilfields.关键词
岩石扩容/疏松砂岩/增产实践/新技术/海上油田Key words
dilation/unconsolidated sandstone/stimulation/new technique/offshore oilfield分类
能源科技引用本文复制引用
孙林,徐斌,熊培祺,杨军伟..疏松砂岩储层油井岩石扩容增产技术及其应用[J].大庆石油地质与开发,2024,43(6):98-105,8.基金项目
国家科技重大专项"渤海油田高效采油工程及配套技术示范"(2016ZX05058-003) （2016ZX05058-003）
中海油能源发展股份有限公司重大科技专项"采油化学产品自主化研发及产业化应用(Ⅰ期)"(HFZDZX-GJ2022-03). （Ⅰ期）
