发明名称 |
METHOD OF INTERPRETING IMPEDANCE DISTRIBUTION OF AN EARTH FORMATION OBTAINED BY A MOVING ARRAY USING END EMITTING CURRENT ELECTRODES SEQUENTIALLY ACTIVATED AND A SERIES OF POTENTIAL ELECTRODES |
摘要 |
<p>METHOD OF INTERPRETING IMPEDANCE DISTRIBUTION OF AN EARTH FORMATION OBTAINED BY A MOVING ARRAY USING END EMITTING CURRENT ELECTRODES SEQUENTIALLY ACTIVATED AND A SERIES OF POTENTIAL ELECTRODES In accordance with the present invention, a method is disclosed for synthesizing the true response characteristics of a combination of different hole-centered electric logging tools in a variety of difficult borehole conditions as provided by (1) determining impedance values of an earth formation penetrated by a borehole filled with a drilling mud of resistivity (Rm), and (2) selectively manipulating the impedance values as impedance entries of a matrix so as to synthesize operations of different hole-centered tools over an associated depth increment with surprising accuracy. Each of the impedance matrices is associated with a matrix gather indexed to one of a series of finite, overlapping depth scan increments of the formation measured along the borehole. Each scan increment is dependent on the array length L of the electrode array to define shallow and deep depth markers as well as being centrally indexed to the depth in the borehole of a mid-central electrode assembly of the array at the time of data collection. The original data is provided by a moving logging array having end emitting current electrodes sequentially activated and a series of potential electrodes.</p> |
申请公布号 |
CA1264087(A) |
申请公布日期 |
1989.12.27 |
申请号 |
CA19860514993 |
申请日期 |
1986.07.30 |
申请人 |
CHEVRON RESEARCH COMPANY |
发明人 |
CHAPMAN, CARROLL W.;ANGEHRN, JORG A. |
分类号 |
G01V3/20;G01V3/38;(IPC1-7):G01V3/38;E21B49/00;E21B47/00 |
主分类号 |
G01V3/20 |
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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