南海西部高温高压高含CO_2井测试技术实践

Testing Technology Practice for HTHP High Containing CO_2 Wells in West of South China Sea

南海西部从2010年至2014年,累计完成了9口井的高温高压测试作业,目的层平均深度4000m,地层压力53~72.8MPa,地层温度130~167℃,测试时现场测得最高二氧化碳含量为78%,属于高温高压高含二氧化碳井。在测试过程中遇到的测试工具密封圈失效、关井中封隔器泄露、压井中测试液沉淀等问题。通过优选测试管柱结构、测试工具密封材质、优化油管及测试液性能,在一定程度上解决了高含二氧化碳测试带来的问题,并在南海西部后续高温高压高含二氧化碳井的测试过程中得到成功应用,并且为后续超高温高压井测试技术,积累了经验,奠定了坚实的技术基础。

Western south China sea from 2010 to 2014,the total finished about nine Wells of high temperature and high pressure test operation,purpose layer average depth of 4000 m,53~72.8MPa,formation pressure of formation temperature 130 ~ 167 ℃,while testing field measured highest co2 content is 78%,belong to high carbon dioxide content in high temperature and high pressure Wells.In view of the west of the south China sea in the process of high CO_2 content in high temperature and high pressure well testing operation,the test tool in seal failure,shut-in packer leak,pressure well testing liquid precipitation and other issues,come up with the corresponding optimization and improvement measures.And in the south China sea west of high carbon dioxide content in high temperature and high pressure well testing process for successful application,and for subsequent ultra high temperature and high pressure well testing technology,accumulated experience,has laid a solid technical foundation.