石油钻采工艺2025，Vol.47Issue(3)：348-356,372,10.DOI:10.13639/j.odpt.202502014
低渗透砂岩储气库交变载荷条件下近井地带数值模拟提升储层出砂预测准确率
Numerical simulation of near-wellbore zone under alternating loads in low-permeability sandstone UGS to improve formation sand production prediction accuracy
摘要
Abstract
In depleted oil and gas reservoir UGS,sand production generally occurs during both gas injection and production phases,which poses significant challenges to the safe operation of the UGS facility.Integrating sand production erosion criteria and based on porous elastoplastic governing equation,a numerical simulation model of sand production is established under alternating loads to calculate the influence of such formation parameters as porosity,permeability,and elastic modulus on sand production in the near-wellbore zone of UGS,and analyze the sand production mechanism in the near-wellbore zone of UGS under alternating loads.The simulation results of UGS Y indicate that the sand erosion area in the wellbore gradually expands as the ratio of horizontal principal stress increases,resulting in higher cumulative sand production.The cumulative sand production exhibits positive correlation with reservoir permeability.In scenarios of high permeability(higher than 20.3×10-3 μm2),the sand production rate sharply increases after 50 days of production,exceeding 1×10-4 m3/m.Conversely,at lower elastic modulus(lower than 26.9 GPa),the sand production rate presents a stepped increase trend.However,as the elastic modulus increases,the growth rate of cumulative sand production significantly slows down.This sand production prediction method is of great significance for ensuring the safe and efficient operation of UGS.关键词
储气库/多周期注采/交变载荷/地层出砂/近井地带/预测模型Key words
underground gas storage/multi-cycle injection/production/alternating load/formation sand production/near wellbore zone/prediction model分类
能源科技引用本文复制引用
王治国,张林,李在顺,田发国,王宁,杨琼警,牛智民,沈志昊..低渗透砂岩储气库交变载荷条件下近井地带数值模拟提升储层出砂预测准确率[J].石油钻采工艺,2025,47(3):348-356,372,10.基金项目
中国石油天然气集团有限公司重大科技专项"致密砂岩气藏提高采收率关键技术研究"(编号:2023ZZ25). （编号:2023ZZ25）
