发明申请
- 专利标题： METHOD OF DOWNHOLE CHARACTERIZATION OF FORMATION FLUIDS, MEASUREMENT CONTROLLER FOR DOWNHOLE CHARACTERIZATION OF FORMATION FLUIDS, AND APPARATUS FOR DOWNHOLE CHARACTERIZATION OF FORMATION FLUIDS
- 专利标题（中）： 形成流体的井下表征方法，形成流体的井下特征的测量控制器，以及用于形成流体的井下特征的装置
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申请号： US12848976申请日： 2010-08-02
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公开(公告)号： US20100313647A1公开(公告)日： 2010-12-16
- 发明人: Toru Terabayashi , Tsutomu Yamate , Hideki Kinjo , Akihito Chikenji , Takeaki Nakayama , Oliver C. Mullins , Soraya S. Betancourt , Michael O'Keefe , Chengli Dong
- 申请人： Toru Terabayashi , Tsutomu Yamate , Hideki Kinjo , Akihito Chikenji , Takeaki Nakayama , Oliver C. Mullins , Soraya S. Betancourt , Michael O'Keefe , Chengli Dong
- 申请人地址： US TX Sugar Land
- 专利权人： SCHLUMBERGER TECHNOLOGY CORPORATION
- 当前专利权人： SCHLUMBERGER TECHNOLOGY CORPORATION
- 当前专利权人地址： US TX Sugar Land
- 主分类号： E21B47/08
- IPC分类号： E21B47/08
摘要：
A downhole characterization apparatus for formation fluids is provided. The apparatus comprises a downhole tool including a flowline for flowing the formation fluids capable of isolating a quantity of the formation fluids in a portion thereof; and a pump unit for depressurizing the isolated formation fluids; and a measurement controller which controls the downhole tool. The measurement controller includes a rough value estimation unit which estimates a rough value of the bubble point pressure of the formation fluids; and a speed controller which controls the depressurizing speed of the pump unit such that the isolated formation fluids are depressurized at a first speed to a certain pressure which is a predetermined value higher than said estimated rough value, and the isolated fluids are depressurized at a second speed which is slower than said first speed in order to measure a precise value of the bubble point pressure.