发明申请
- 专利标题: Method and System for Removing Effects of Conductive Casings and Wellbore and Surface Heterogeneity in Electromagnetic Imaging Surveys
- 专利标题(中): 导电套管和井筒的影响方法与系统及电磁成像测量中的表面异质性
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申请号: US11768975申请日: 2007-06-27
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公开(公告)号: US20090005992A1公开(公告)日: 2009-01-01
- 发明人: David Alumbaugh , Ping Zhang , Edward Nichols , Frank Morrison , Aria Abubakar , Tarek Habashy
- 申请人: David Alumbaugh , Ping Zhang , Edward Nichols , Frank Morrison , Aria Abubakar , Tarek Habashy
- 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: G01V3/38
- IPC分类号: G01V3/38
摘要:
Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles, densely resampling transmitter locations using common positions for the receiver profiles, coarsely resampling the data at discreet transmitter locations, defining a starting model for inversion, weighting the data by a factor, converting the normalized voltage data to ratios, calculating a conductivity image using a ratio inversion method, and verifying that an inversion has converged and the image is geologically reasonable. The image can then be displayed. The invention can be used for cross-well, surface-to-borehole, and borehole-to-surface measurements by which the effects of steel casing are reduced.