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公开(公告)号:US07216533B2
公开(公告)日:2007-05-15
申请号:US11132475
申请日:2005-05-19
申请人: Malcolm D. McGregor , Gregory N. Gilbert , Mark A. Proett , James M. Fogal , David Welshans , Glenn C. Gray , Svetozar Simeonov , Laban M. Marsh , Jean Michel Beique , James E. Stone
发明人: Malcolm D. McGregor , Gregory N. Gilbert , Mark A. Proett , James M. Fogal , David Welshans , Glenn C. Gray , Svetozar Simeonov , Laban M. Marsh , Jean Michel Beique , James E. Stone
CPC分类号: E21B49/10 , E21B33/1216 , E21B49/008
摘要: A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown piston then creates a volume within a cylinder to draw formation fluid into the volume through the probe assembly. The pressure of the fluid within the cylinder is monitored. The formation test procedure may then be adjusted. The test procedure may be adjusted to account for the bubble point pressure of the fluid being monitored. The pressure may monitored to verify a proper seal is formed or is being maintained. The test procedure may also be performed by maintaining a substantially constant drawdown rate using a hydraulic threshold or a variable restrictor.
摘要翻译: 使用地层测试仪在钻柱上测试井下地层的方法。 地层测试仪设在钻柱井下,通过在地层探测器组件和地层之间形成密封来进行地层试验。 然后,下降活塞在气缸内产生体积,以将地层流体通过探针组件吸入体积。 监测气缸内液体的压力。 然后可以调整地层测试程序。 可以调整测试程序以考虑被监测流体的泡点压力。 可以监测压力以验证形成或正在保持适当的密封。 也可以通过使用液压阈值或可变节流器维持基本上恒定的抽出率来执行测试程序。