摘要
伸缩短接能有效改善测试管柱的受力状况,提高测试作业成功率,越来越广泛地应用到深层气井作业中,但如何对带伸缩短接测试管柱进行力学分析和优化设计,已经成为困扰现场作业工程师而又急需解决的技术难题。为此,首先建立了伸缩短接力学分析模型,在此基础上建立了带伸缩短接测试管柱在封隔器内不能移动情况下管柱、封隔器以及封隔器处套管的受力分析数学模型,并针对深层气井特点建立了管柱强度校核方法,为伸缩短接启动载荷计算、安装位置确定、长度设计以及管柱优化设计提供了理论依据。将研究成果应用于川东北元坝2井,对测试管柱重新设计后,使原本无法满足施工要求的测试管柱满足了高温高压深层气井的施工要求。
Slip joints,widely applied in deep gas wells,can effectively increase the load distribution along the well testing string and thus improving the success rate of well testing operations.However,how to make a mechanical analysis and an optimal design of the slip-joint-added well testing string has become a difficult technical problem puzzling the testing engineers and waiting for solution as early as possible.For this reason,a mechanical analysis model was first set up for slip joints.Then other mechanical analysis models for well testing tubing string,packer and casing near the packer were established while the downhole string with slip joints could not move within the packer.And a strength checking method was developed for deep gas wells,thus providing the theoretical basis for the calculation of the trigger loads,positions and lengths of the slip joints and optimal design of the testing string.The study results were used in the deep gas well Yuanba 2 for re-designing of the well testing string,which thus could meet the requirement of the HPHT deep gas well testing.The field applications show that this set of method can be applied for mechanical analysis and optimization design of the well testing string with slip joints.It is significant for improving success rate and economic benefits of testing for deep gas wells.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2011年第3期70-72,114,共3页
Natural Gas Industry
基金
国家自然科学基金项目(批准号:50774063)
关键词
深井
气井
伸缩短接
测试管柱
力学分析
测试成功率
元坝2井
应用效果
deep well,gas well,slip joint,testing string,mechanical analysis,well testing success rate,well Yuanba 2,application results
