An Experimental Study Of Seismoelectric Signals In Logging While Drilling
Acoustic logging while drilling (LWD) may be complicated because of contamination by waves propagating along the drill collar (the tool waves). In this paper we propose a new method for separating tool waves from the true formation acoustic arrivals in borehole acoustic LWD. The method utilizes the...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Technical Report |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/67905 |
| _version_ | 1826190620222291968 |
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| author | Zhan, Xin Zhu, Zhenya Chi, Shihong Rao, Rama V. N. Toksoz, M. Nafi |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Zhan, Xin Zhu, Zhenya Chi, Shihong Rao, Rama V. N. Toksoz, M. Nafi |
| author_sort | Zhan, Xin |
| collection | MIT |
| description | Acoustic logging while drilling (LWD) may be complicated because of contamination by waves propagating along the drill collar (the tool waves). In this paper we propose a new method for separating tool waves from the true formation acoustic arrivals in borehole acoustic LWD. The method utilizes the seismoelectric signal induced by the acoustic wave at the fluid-formation boundary. The basis for seismoelectric conversion is the electric double layer (EDL) that exists in most rock-water systems. EDL does not exist at the tool (conductor) water interface. Therefore, there should be no seismoelectric signals due to tool modes. In this paper, borehole monopole and dipole LWD acoustic and seismoelectric phenomena are investigated with laboratory measurements. The main thrust of the paper is the utilization of the difference between acoustic and seismoelectric signals, to eliminate the tool waves and enhance the formation acoustic signals in acoustic LWD. |
| first_indexed | 2024-09-23T08:42:49Z |
| format | Technical Report |
| id | mit-1721.1/67905 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:42:49Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/679052019-04-09T19:24:08Z An Experimental Study Of Seismoelectric Signals In Logging While Drilling Zhan, Xin Zhu, Zhenya Chi, Shihong Rao, Rama V. N. Toksoz, M. Nafi Massachusetts Institute of Technology. Earth Resources Laboratory Zhan, Xin Zhu, Zhenya Chi, Shihong Rao, Rama V. N. Toksoz, M. Nafi Acoustic logging while drilling (LWD) may be complicated because of contamination by waves propagating along the drill collar (the tool waves). In this paper we propose a new method for separating tool waves from the true formation acoustic arrivals in borehole acoustic LWD. The method utilizes the seismoelectric signal induced by the acoustic wave at the fluid-formation boundary. The basis for seismoelectric conversion is the electric double layer (EDL) that exists in most rock-water systems. EDL does not exist at the tool (conductor) water interface. Therefore, there should be no seismoelectric signals due to tool modes. In this paper, borehole monopole and dipole LWD acoustic and seismoelectric phenomena are investigated with laboratory measurements. The main thrust of the paper is the utilization of the difference between acoustic and seismoelectric signals, to eliminate the tool waves and enhance the formation acoustic signals in acoustic LWD. Massachusetts Institute of Technology. Earth Resources Laboratory Massachusetts Institute of Technology. Borehole Acoustics and Logging Consortium 2012-01-05T17:25:15Z 2012-01-05T17:25:15Z 2005 Technical Report http://hdl.handle.net/1721.1/67905 Earth Resources Laboratory Industry Consortia Annual Report;2005-07 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Zhan, Xin Zhu, Zhenya Chi, Shihong Rao, Rama V. N. Toksoz, M. Nafi An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title | An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title_full | An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title_fullStr | An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title_full_unstemmed | An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title_short | An Experimental Study Of Seismoelectric Signals In Logging While Drilling |
| title_sort | experimental study of seismoelectric signals in logging while drilling |
| url | http://hdl.handle.net/1721.1/67905 |
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