深水定向井压回法压井气液两相逆向流动试验研究

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中图分类号：TE952 文献标识码：A DOI：10.12473/CPM.202407008

Design and Application of a Simulation Test Device Based on Gas-Liquid Countercurrent Flow in Deepwater Directional Wells During Bullheading Kill

Ren Meipeng'ZhangWei²Yin Zhiming1 Ding Tianbao³，4，5 Sun Baojiang3，4.5 Wang Zhiyuan3，4，5 Yin Bangtang³，4.5

（1.CNOOCResearchInstuteCo.，Ld.；2.PetroChinaTarimOilfeldCompany；3.NationalKeyLaboratoryofDepOiland GasatChinaUniversityofPetrolem（EastChina）；4.NationalEngineeingResearchCenterofOil&GasDrilingndCompletion Technology；5.SchoolofPetroleum Engineering，ChinaUniversityofPetroleum（East China））

Abstract：The pattrn of gas-liquidcountercurrent flow in inclined wellbore with high-viscosity liquid phase has scarcely studied.Inthis paper，a visual simulation test device based ongas-liquid countercurrent flow in directional wels during bullheading kill was designed，and it was applied for bubble migrationandflow patern conversion tests at diferent apparent gas-liquid velocities，liquid-phase viscositiesand wellbore inclination angles.The testresultsshow that with thehorizontal inclinationof the welbore，the migrationvelocityof small bubbles decreases gradually，and the migration velocityof Taylor bubbles increases gradually，and the countercurrent liquid velocity and liquid phase viscosity can inhibit bubble migration.Given a constant apparent liquid velocity， as the apparent gas velocity increases，the flow patern converts from bubble flow to elastic cap flow and slug flow.

Given aconstant apparent gas velocity，as the apparent liquid velocity increases，the bubble flow changes to elastic capflow.In case of bullheading kill，the viscosityof thekillfluid can be appropriately increased to press the bubles back in the wellbore more eficiently.Theresearch results can provide theoretical and technical support for safe and efficient well control during deepwater oil and gas development.

Keywords： deepwater directional wells； bullheading kill；gas -liquid countercurrent flow；simulation test device；bubble bullheading；flow pattern conversion

0 引言

随着我国工业化和现代化的高速发展，石油和天然气消耗量不断增加，目前我国已成为全球第二大石油消费国、第一大原油与天然气进口国。（剩余14277字）