也门71区块长裸眼段气井测试后压井技术

也门71区块油气井长裸眼段测试压井施工过程中,为了将封隔器以下口袋内的油气推回油气层和循环带出地面,在分析拟测试井地质油藏资料和工程参数的基础上,提出了一种集平推压井法和反循环节流压井法于一体的压井技术。在该地区4口探井的测试作业中,应用该技术都在48 h以内完成压井作业。其中,Henin-1ST井裸眼口袋长达710 m,测试压井作业中仅用27 h就将井压稳,井内无外溢,无漏失,并安全顺利地起出测试管柱和DST测试工具。现场应用表明,该压井技术为油气井测试后压井作业安全提供了保证,可在其他类似工况条件的压井作业中推广应用。 

An Integrated Well Killing Technology Applied after Gas Well Testing in Long Open Hole in Block Yemen 71

In order to push and circulate out the oil and gas retained in the pocket below the packer during the well killing for long open hole testing of oil and gas wells in Block Yemen 71, an integrated well killing method combining bullheading well killing method with reverse-circulation throttle well killing method was developed after the test wells were seriously analyzed in terms of reservoir geological information and engineering parameters. Based on the integrated technologies, all well killing problems were handled successfully within 48 hours after the testing of 4 exploration wells in this block. Although the length of open hole pocket reached 710m in Well Henin-1ST, it only took 27 hours to kill the well without overflow or mud lose, and the DST strings and tools were pulled out of the hole safely and smoothly. Based on field application, this integrated well killing method was a reasonable solution for well testing operation, and it could be utilized effectively in other engineering projects with similar operational conditions.