东海凝析气层一体化测试管柱井下PVT取样技术  

Downhole PVT sampling technology with integrated testing string in condensate gas layer in East China Sea

作　　者：赵幸滨 周志祥 鲁法伟 冯大龙 ZHAO Xingbin;ZHOU Zhixiang;LU Fawei;FENG Dalong(Department of Exploration of Shanghai Company,CNOOC Limited,Shanghai 200335,China;CNOOC Energy Development Co.,Ltd.,Shanghai Engineering Technology Branch,Shanghai 200335,China;Engineering Technology Center of Shanghai Company,CNOOC Limited,Shanghai 200335,China)

机构地区：[1]中海石油(中国)有限公司上海分公司勘探部,上海200335 [2]中海油能源发展股份有限公司上海工程技术分公司,上海200335 [3]中海石油(中国)有限公司上海分公司工程技术中心,上海200335

出　　处：《油气井测试》2023年第5期14-18,共5页Well Testing

基　　金：中国海洋石油有限公司“十四五”重大科技项目海上深层/超深层储层经济产能获取技术研究(KJGG2022-0406)。

摘　　要：钢丝作业取井下PVT样品方式在海上凝析气层测试中存在用时长、圈闭易失效、安全风险高等问题。根据TCP+APR一体化管柱特点,将SPS保压单相取样枪及其托筒连接在测试管串上一并入井,通过控制环空压力激发取样枪并圈闭井下流体样品。该技术性能稳定,取样成功率高,样品质量可以满足油气藏评价要求,测试作业效率及安全性明显提升。以东海某勘探区为例,5年内共进行了13井次应用,取样成功率100%,累计节约作业时间超200 h。海上勘探油气藏类型越来越复杂,成本控制和高质量勘探要求下,一体化测试管柱井下PVT取样技术具有重要的现实推广意义。The method of wireline operation for downhole PVT sampling in offshore condensate gas layer testing is plagued by issues such as time-consuming operations,easy trap failure,and high safety risks.According to the characteristics of the TCP+APR integrated pipe string,the SPS pressure-maintaining single-phase sampling gun and its holder were connected to the testing pipe string and run into the well together.Fluid samples were collected by controlling annular pressure to activate the sampling gun and trap downhole fluid samples.This technology offers a stable performance and a high success rate for sampling,and the sample quality can meet the requirements for reservoir evaluation.It significantly improves testing efficiency and safety.Taking some exploration area in the East China Sea as an example,this technology was applied 13 times over five years,with a 100%success rate in sampling and a cumulative time savings of over 200 hours.As exploration in offshore oil and gas reservoirs becomes more complex,cost control and high-quality exploration are essential,making the downhole PVT sampling technology with integrated testing string of significant practical importance.

关 键 词：东海 凝析气层 测试 一体化管柱 SPS单相取样器 PVT取样 应用效果 

分 类 号：TE353[石油与天然气工程—油气田开发工程]