摘要
高压高产气井出砂机理复杂,过高的生产速率在近井筒区域产生很强的紊流效应,是导致地层出砂的重要原因.通过物理模拟试验发现,高速气体通过孔眼时能够产生很强的抽汲作用力,通过数值模拟分析了井下气体流速与抽汲作用力的关系,考虑抽汲作用力形成的附加压差,以及酸化改造对岩石强度影响,对高压高产气井出砂临界生产压差预测方法进行了修正.为解释高压高产气井出砂机理以及出砂预测提供参考.
The mechanism of sand production in high pressure and high production gas wells is complex.High production rate will produce a strong turbulence effects in the nearbore region,which is an important cause of formation sand production.Through physical simulation experiment,it is found that the high-speed gas through the holes can produce strong suction force.The relationship between underground gas flow rate and suction force is analyzed with numerical simulation.Considering the additional differential pressure caused by suction force,as well as the impact of acidizing on rock strength,the critical drawdown pressure prediction method for sand production in high pressure high rate gas wells is modified.This will provide a reference for the sanding mechanism and prediction of sand production in high pressure and high productivity gas wells.
作者
马亚琴
张宝
钟建芳
易俊
郝剑
MA Yaqin;ZHANG Bao;ZHONG Jianfang;YI Jun;HAO Jian(Petroleum Engineering Institute,PetroChina Tayim Oilfield Company,Korla,Xinjiang841000,China;Oilfield Operation Company,Yumen Oilfield Company,Jiuquan,Gansu735019,China)
出处
《钻采工艺》
CAS
北大核心
2019年第5期43-44,58,共3页
Drilling & Production Technology
基金
塔里木油田科研项目“克深区块高压气井投产后出砂原因分析及防治措施研究”(编号:201015120037)
关键词
高压高产气井
紊流效应
出砂机理
抽汲作用力
试验研究
数值模拟
high pressure high-yielding gas well
turbulence effect
sand production mechanism
suction force
expereimental study
numerical simulation
