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| Analysis and testing of a new electrokinetic logging tool composite electrode array |
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LI Fengbo1,2, JU Xiaodong1,2, QIAO Wenxiao1,2, LU Junqiang1,2, MEN Baiyong1,2
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(1.State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;2.Key Laboratory of Earth Prospecting and Information Technology in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| The composite electrode array in electrokinetic logging detectors was studied, with focuses on its structure, working principle, electronic system principle and testing. A numerical modelling study with the electrode array was carried out using finite element method, then the results in the electric field response were analyzed to solve for the numerical solution of the electrode array coefficient. Next, the electronic circuit principle of the composite electrode array was also analyzed, and power-on test and high temperature experiment with the exciting circuit and data acquisition circuit system were also conducted. The results show that this detector successfully merges acoustic logging and electric logging detectors with different structure and material together, and can align the acoustic and electrical signals in the depth of the record point; the electronic circuit system functions well in high temperature and then can be experiment in downhole. The results also suggest the technique has great feasibility for downwhole field tests and analyzing electrokinetic logging tool. |
| Key words: electrokinetic logging seismoelectric effect electrokinetic effect electrode array |
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