针对稠油蒸汽驱、SAGD和火驱开发井下高温,现有电缆和高温测试仪器不能满足井下温度压力数据长期直读监测的问题,开发研制了高温井下温度压力数据声传直读监测技术,该技术将井下测试的温度压力数据经编码后,采用声传方式,通过生产管柱将信号传输至井口,井口信号采集器接收信号,经解码计算得到井下温度压力数据。现场应用5井次,结果表明,地面录取的温度压力数据与仪器存储数据一致,且对油井生产制度的调整起到了实时指导作用。该技术能够满足稠油热采井井下温压数据长期直读监测的需求,对油井生产动态分析和工作制度调整起到了重要指导作用,可有效提高油井开采效果。
With the wide application of steam flooding, SAGD and fire-flooding in heavy oil reservoir, the bottomhole temperature of oil production wells gradually increases, and the maximum temperature could reach 260 ℃, which greatly limits the long-term bottomhole temperature and pressure direct reading monitoring with available cables and high temperature testing instruments. A acoustic direct reading monitoring technology of bottomhole temperature and pressure was developed by encoding the bottomhole temperature and pressure data. Acoustic transmission was adopted to transmits the signal to wellhead through production string. The wellhead signal collector receives the signal and obtains the bottomhole temperature and pressure data by decoding and calculation. 5 wells application indicate that the recorded temperature and pressure data on the surface are consistent with that stored in the instrument, which could also provide certain real-time guidance for the well production system adjustment. This technology realizes the long-term temperature and pressure direct reading monitoring in heavy oil well with thermal recovery treatment and could provide certain guidance for the well production performance analysis and production system adjustment, which can significantly improve the well production performance.
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