发明名称 |
Efficient and accurate pseudo 2-D inversion scheme for multicomponent induction log data |
摘要 |
A fast, efficient and accurate pseudo 2-D inversion scheme for resistivity determination of an anisotropic formation uses data from a tool (3DEX) comprising three transmitters and three corresponding receivers sampling the formation in a plurality of spatial directions. An initial model of the formation including invasion zones is obtained using a conventional multifrequency and/or multispacing logging tool. A pseudo 2-D inversion scheme combines an accurate full 2-D forward solution of the synthetic responses of the earth model with a 1-D approximation of the sensitivity matrix of the horizontally layered anisotropic background model. The timesaving compared to a regular 2-D inversion scheme can be tremendous. The applicability of this scheme is important in cases when borehole and near-zone effects do not allow an interpretation based on 1-D inversion. A comparison of the pseudo 2-D inversion scheme versus a full 2-D inversion using a realistic synthetic example shows that the pseudo 2-D inversion scheme performs as well as the full 2-D inversion, but in a much shorter time.
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申请公布号 |
US2003055566(A1) |
申请公布日期 |
2003.03.20 |
申请号 |
US20020060108 |
申请日期 |
2002.01.29 |
申请人 |
BAKER HUGHES, INC. |
发明人 |
KRIEGSHAUSER BERTHOLD;MCWILLIAMS STEVE;FANINI OTTO;YU LIMING |
分类号 |
G01V3/28;G01V11/00;(IPC1-7):G01V3/18 |
主分类号 |
G01V3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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