Title:
TIME DOMAIN ELECTROMAGNETIC TENSOR BASED LOGGING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/072235
Kind Code:
A1
Abstract:
A time domain electromagnetic tensor based logging method, relating to the field of induction logging. A transmitting coil system Tx and a receiving coil system Rx are each composed of three orthogonal direction coils, and the transmitting coil system and the receiving coil system form a borehole probe; a time domain electromagnetic field is excited by means of two orthogonal transmitting coil systems Tx, and a secondary field signal is received by two orthogonal receiving coil systems Rx located above transmitting coils and having a distance D; during each measurement, three directions are used for transmitting, nine component data is received at the same time, and each component is a series of induction potentials in one-to-one correspondence with measurement time sequences, and a potential or resistance change, from near to far, of the rock stratum where a measurement point is located is obtained after time-depth conversion. According to the logging method, the downhole construction efficiency is improved, the anisotropy characteristics of a geologic body are effectively identified by fully detecting geological information of a geologic body in each component direction, and the detection precision and range are improved.
Inventors:
YANG HAIYAN (CN)
LIU ZHIXIN (CN)
CHU DANHUA (CN)
YUE JIANHUA (CN)
HU SHUANGGUI (CN)
GU YANYAN (CN)
XU YUNLEI (CN)
LI WENYU (CN)
RAN HUAGENG (CN)
CHE RONGQI (CN)
SUN MENGLANG (CN)
LI ZHENYANG (CN)
LIU ZHIXIN (CN)
CHU DANHUA (CN)
YUE JIANHUA (CN)
HU SHUANGGUI (CN)
GU YANYAN (CN)
XU YUNLEI (CN)
LI WENYU (CN)
RAN HUAGENG (CN)
CHE RONGQI (CN)
SUN MENGLANG (CN)
LI ZHENYANG (CN)
Application Number:
PCT/CN2022/128195
Publication Date:
May 04, 2023
Filing Date:
October 28, 2022
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
G01V3/18; E21B47/00; G01V3/38
Foreign References:
| CN111058834A | 2020-04-24 | |||
| CN114089428A | 2022-02-25 | |||
| CN109209354A | 2019-01-15 | |||
| CN106772644A | 2017-05-31 | |||
| CN112814668A | 2021-05-18 | |||
| EP0084001A2 | 1983-07-20 |
Other References:
YAN MINJIE, DANG RUIRONG, YUAN AMING AND XIE YAN: "The study of a three component induction logging system", PETROLEUM INSTRUMENT, vol. 23, no. 1, 15 February 2009 (2009-02-15), pages 9 - 12, XP009545181, ISSN: 2096-0077
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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