基于综合频率分析法的高温高压可回收封隔器卡瓦优化研究

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关键词：高温高压；可回收封隔器；综合频率分析法；卡瓦结构优化；正交试验；超深井；解封功能

中图分类号：TE925 文献标识码：A DOI：10.12473/CPM.202505011

Abstract：With the deepening of explorationand development in the Tarim Basin，Junggar Basinand Sichuan Basin，deep and ultra-deep high-temperature high-pressure （HTHP）reservoirs have put forward more strict requirements on the anchoring and unseating performance of retrievable packers.In response to completion problems inultra-deep HTHP oil and gas wels，taking thesplit slipof retrievable hydraulic packeras the research object，combined with downholeconditionsof HTHP wels，basedon finite element methodand comprehensive frequency analysis method，thekey geometric parameter optimizationof slips was accomplished.Meanwhile，the reliabilityof the optimized slip function was validated through performance test and field test.The research results show that uneven force distribution on slip teeth and significant variation in casing penetration depth during the anchoring processof split slipare one of the main reasons for the failure of normal unseating ofitunder HTHP conditions.Compared withother experimental factors，the innerconeangleofslip（factor D）hasagreat influenceon theevaluation indexof theexperiment，while the inter-toth width （factorC）hasasmallerinfluence.The optimal experimental scheme determined by the comprehensive frequency analysis method is A2B2CD 12 ，under which，the yield failure rate of material decreases from 9. 04% to 7.19 % ，and the equivalent plastic strain of casing decreases from 0.028 87 to O.O0698.The optimized slip structure has normal anchoring and unseating functions during the completion ofultra-deep HTHPoil and gas wels，and it can effectively solvethe problem of abnormal unseating of packers.The research results provide reference for the structural design and field application of split slips.

Keywords ： high-temperature high-pressure （HTHP）；retrievable packer;comprehensive frequency analysismethod； slip structure optimization； orthogonal experimental；ultra-deep well； unseating function

0 引言

我国塔里木盆地、准噶尔盆地和四川盆地等的“深地工程”勘探开发不断取得突破。（剩余10645字）