超深含硫探井多封隔器分段改造技术  

Multi-packer stage reconstruction technology of ultra-deep sulfur exploration well

作　　者：刘啸峰[1] 刘殷韬 董海峰[1] 夏彪 LIU Xiaofeng;LIU Yintao;DONG Haifeng;XIA Biao(Petroleum Engineering Technology Research Institute of Sinopec Southwest Oil&Gas Branch,deyang,Sichuan 618000,China)

机构地区：[1]中石化西南油气分公司石油工程技术研究院,四川德阳618000

出　　处：《油气井测试》2023年第4期17-21,共5页Well Testing

基　　金：中国石化科技部项目“超深气井测试投产关键工具研发及一体化工艺研究”(P21068)。

摘　　要：川西海相雷口坡为埋藏深、高温、高压、高含酸性腐蚀气体的碳酸岩储层,其纵向上Ⅰ、Ⅱ、Ⅲ类储层交叉叠置,储层非均质性强,笼统酸化改造无法达到产能评价目的;多趟管柱逐层测试作业时间长、成本高,无法满足降本增效的要求。为了实现一趟管柱分段改造,兼顾资料求取的目的,针对储层类型特征,通过封隔器及配套工具优选、多封隔器管柱受力分析、超高压施工参数优化设计等手段,形成了一套以“国产机械式+液压式封隔器组合实现分段、APR测试工具实现资料求取”的分段测试管柱及作业技术。该技术在PZ103井经受了155℃高温、112 MPa高压、长达13 h作业,成功实现了储层的有效分段改造,录取到了完整的产能数据,为超深含硫气井分段测试提供了新的思路。The Leikoupo formation in the western Sichuan basin is a carbonate rock reservoir with deep burial,high temperature,high pressure,and high content of acidic corrosive gases.Vertically,ClassⅠ,Ⅱ,andⅢreservoirs intersect and overlap,resulting in strong heterogeneity of the reservoir.General acidification transformation cannot achieve the purpose of productivity evaluation;The multi-layer testing of multiple pipe columns takes a long time and costs high,which cannot meet the requirements of cost reduction and efficiency improvement.In order to achieve a segmented transformation of the tubing string and take into account the purpose of data acquisition,a set of segmented testing tubing and operation techniques using a combination of domestic mechanical and hydraulic packers to achieve segmentation,and APR testing tools to achieve data acquisition,have been formed based on the characteristics of reservoir types,through methods such as selecting packers and supporting tools,analyzing the stress of multiple packers on the tubing string,and optimizing the design of ultra-high pressure construction parameters.This technology has undergone 155℃high temperature,112 MPa high pressure,and 13 hours of operation in PZ103 well,successfully achieving effective segmented transformation of the reservoir,and obtaining complete production capacity data,providing a new idea for segmented testing of ultra deep sour gas wells.

关 键 词：超深井 高含硫井 探井 酸化改造 RTTS封隔器 Y241封隔器 分段改造 参数优化 

分 类 号：TE353[石油与天然气工程—油气田开发工程]