大涝坝凝析气藏高含蜡凝析油注气石蜡析出分析

发布时间：2018-07-09 12:50

本文选题：塔里木盆地 + 大涝坝凝析气藏　；参考：《新疆石油地质》2017年01期

【摘要】：以塔里木盆地大涝坝高含蜡凝析气藏地层流体作为研究对象,利用可连接高温高压DBR-PVT测试装置的激光测试仪和在线过滤器,展开凝析油析蜡点和在线析蜡量实验测试,同时注入气进行多次向后接触后析蜡点测试,结合石蜡析出理论计算模型的计算结果进行对比分析。结果表明:以石蜡组分作为可调参数进行析蜡点、析蜡量模拟与实验测试结果能很好的契合,将流体中石蜡组成物质的量分数代入理论模型进行计算,能很好地预测流体多次向后接触前、后的析蜡点和析蜡量;同时,基于此流体体系进行模拟计算,给出了DL4井注入气不同接触次数后流体组成变化和不同温度下析蜡量变化趋势,注入气体主要以抽提作用为主,导致流体重质组分含量增加且析蜡点上升。所得结果可为凝析气藏进行注气前、后析蜡量计算提供依据。
[Abstract]:Taking the formation fluid of waxy condensate gas reservoir in Dawei dam of Tarim Basin as the object of study, the laser tester and on-line filter which can connect the high temperature and high pressure DBR-PVT testing device are used to carry out the experimental test of the condensate wax point and the amount of wax condensate on line. At the same time, the injection gas was used to measure the wax point after repeated backward contact, and the calculated results of the theoretical model of paraffin precipitation were compared and analyzed. The results show that the paraffin fraction in the fluid can be calculated by the theoretical model when paraffin component is used as the adjustable parameter for the wax precipitation point, and the results of the wax precipitation simulation are in good agreement with the results of the experimental test, and the amount fraction of the paraffin component in the fluid is replaced by the theoretical model. It can well predict the waxing point and the amount of wax precipitation before and after the fluid contact with the fluid for many times, at the same time, the simulation calculation is carried out based on the fluid system. The variation of fluid composition and wax evolution at different temperatures after different contact times of injected gas in DL4 well are given. The injection gas is mainly extracted, which leads to the increase of the content of heavy components and the increase of wax evolution point in DL4 well. The results can be used to calculate the amount of wax evolution before and after gas injection in condensate gas reservoir.
【作者单位】：西南石油大学石油与天然气工程学院;中国石化西南油气分公司川中矿区;中国石油华北油田分公司勘探开发研究院;
【基金】：中国石油科技重大专项(2011B-1507)
【分类号】：TE37

【相似文献】