靖边气田下古碳酸盐储层堵塞机理研究  

Study on Blocking Mechanism of Lower Paleocarbonate Reservoir in Jingbian Gas Field

作　　者：陈怀兵[1,2] 王志刚 李大昕 CHEN Huai-bing;WANG Zhi-gang;LI Da-xin(CCDC Drilling&Production Technology Research Institute,Shaanxi Xi an 710018;National Engineering Laboratory for Exploration and Development of Low-permeability Oil&Gas Field,Shaanxi Xi an 710018;Sixth Gas Production Plant of PetroChina Changqing Oilfield Company,Shaanxi Xi an 710018;Fifth Gas Production Plant of PetroChina Changqing Oilfield Company,Inner Mongolia Uxin Banner 017300,China)

机构地区：[1]川庆钻探工程有限公司钻采工程技术研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]中国石油长庆油田分公司第六采气厂,陕西西安710018 [4]中国石油长庆油田分公司第五采气厂,内蒙古乌审旗017300

出　　处：《广州化工》2023年第12期206-209,245,共5页GuangZhou Chemical Industry

摘　　要：近年来,长庆气区老井因井筒结垢、储层堵塞、水锁等伤害导致的异常井数每年以总井数3%的速度递增,递增速度逐年加快,严重影响气田持续稳产,其中靖边气田的异常井数占比高,产量下降尤其严重。本文通过储层岩心高温高压敏感性评价、结垢对储层的伤害评价、液相圈闭伤害预测,明确靖边气田下古碳酸盐储层堵塞机理。结果表明:靖边气田下古碳酸盐储层堵塞机理主要为敏感性伤害堵塞(水敏、盐敏、应力敏感)、结垢堵塞和液相圈闭伤害堵塞。In recent years,the number of abnormal wells caused by wellbore scaling,reservoir blockage and water lock increased by 3%annually in changqing gas area,which seriously affected the stable production of the gas field.Among them,Jingbian Gas field had a high proportion of abnormal wells,and the production decline was particularly serious.The damage mechanism of lower paleozoic reservoir in Jingbian Gas field was clarified by evaluating the sensitivity of reservoir core to high temperature and high pressure,evaluating the damage caused by scaling,and evaluating the damage caused by liquid phase trap.The results showed that the blocking mechanism of the lower palaeo-carbonate reservoir in Jingbian Gas field was mainly sensitive damage blocking(water sensitive,salt sensitive,stress sensitive),scale blocking and liquid phase trap damage blocking.

关 键 词：靖边气田 储层堵塞 敏感性伤害 结垢堵塞 液相圈闭伤害 

分 类 号：TE377[石油与天然气工程—油气田开发工程]