CO2蒸汽复合吞吐技术在新疆油田车510区块的应用  

APPLICATION OF STEAM CARBON DIOXIDE HUFF AND PUFF FLOODING TECHNOLOGY IN WELL CHE 510 OF XINJIANG OILFIELD

作　　者：廖先燕[1] 丁雅婷 李丽[1] 杨晓影 陈紫荆 侯军伟 LIAO Xianyan

机构地区：[1]新疆油田公司采油一厂 [2]中国石油大学,北京 [3]渤海钻探井下作业分公司工程地质研究所

出　　处：《钻采工艺》2019年第4期64-66,10,共3页Drilling & Production Technology

基　　金：中国石油重大专项“砂砾岩油藏提高采收率技术研究与应用”(编号:2012E-34-07)

摘　　要：新疆油田车510区块为典型的高孔、高渗中等非均质稠油油藏,单纯使用蒸汽开发,容易发生蒸汽超覆、汽窜等问题,影响开发效果。为解决上述问题,新疆油田采油一厂于2015年开展了CO2复合蒸汽吞吐改善稠油热采效果的试验。利用经验方法,同时结合车510区块油藏的实际情况,对CO2吞吐参数进行了研究,确定了适宜的注汽压力、注汽量和施工工艺。施工效果的统计和分析表明,使用液态CO2注入时,随着注入速度的增大,CO2蒸发速度变慢,会导致井口压力增大。CO2注入过程中应合理匹配注入压力和速度,保持井底压力略低于破裂压力。蒸汽-CO2吞吐工艺,CO2复合蒸汽吞吐具有较好的增压和调剖作用,可有效提高蒸汽热利用效率,改善吞吐开发效果,在其他浅层稠油区块同样具有借鉴意义。Well Che 510 in Xinjiang Oilfield is a typical high-porosity, high-permeability and medium-heterogeneous heavy oil reservoir. Only steam is easy to produce steam overburden and steam channeling problems. To solve the above problems,Xinjiang Oilfield No. 1 Oil Production Plant has carried out CO2-steam compound stimulation tests to improve the heavy oil thermal recovery in 2015. The parameters of carbon dioxide throughput,such as the steam injection pressure,steam injection volume and procedures were determined. The operation statistics show with the increase of liquid CO2 injection rate,the evaporation rate of CO2 slows down,leading to the increase in wellhead pressure. During CO2 injection process,reasonable injection pressure and speed should be adopted,keeping the bottom pressure slightly lower than the breakdown pressure. SteamCO2 huff and puff technology has better pressurization and profile control effects,which can effectively improve the steam heat efficiency,able to provide reference for other heavy oil blocks.

关 键 词：新疆油田 稠油油藏 蒸汽CO2复合吞吐 开发设计 

分 类 号：TE3[石油与天然气工程—油气田开发工程]