Research and application of high-resolution micro-cylindrically focused logging tool
The unknown nature and complexity of non-uniform formations cause new difficulties and challenges to the accurate detection of electrical instruments in shallow formations. The micro-cylindrically focused logging tool (MCFL) can provide three original measurement curves, RB0, RB1, and RB2, with diff...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1132252/full |
| _version_ | 1797902914686025728 |
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| author | Jigen Xia Jigen Xia Zhiqiang Li Zhiqiang Li Yongli Ji Yongli Ji Hengrong Zhang Fangong Li Fangong Li Junyi Li Junyi Li Xingmeng Dong Xingmeng Dong |
| author_facet | Jigen Xia Jigen Xia Zhiqiang Li Zhiqiang Li Yongli Ji Yongli Ji Hengrong Zhang Fangong Li Fangong Li Junyi Li Junyi Li Xingmeng Dong Xingmeng Dong |
| author_sort | Jigen Xia |
| collection | DOAJ |
| description | The unknown nature and complexity of non-uniform formations cause new difficulties and challenges to the accurate detection of electrical instruments in shallow formations. The micro-cylindrically focused logging tool (MCFL) can provide three original measurement curves, RB0, RB1, and RB2, with different detection depths, which reflect the flushing zone resistivity, mudcake resistivity, and mudcake thickness. In this study, the finite element method was used to model and analyze the micro-cylindrically focused logging tool tool in a three-dimensional non-uniform medium model. By converting the partial differential equation into a generalized polar problem, the logging response characteristics of the micro-cylindrically focused logging tool tool at different detection depths and ranges, mudcake thicknesses, flush zones, and mudcake resistivity contrasts were investigated. Inverse processing of the micro-cylindrically focused logging tool data using the least-squares method was used to obtain the flush zone resistivity, mudcake resistivity, and mudcake thickness, based on which the micropotential and microgradient curves were synthesized. In addition, a digital focusing method was proposed to improve the focusing accuracy and flexibility of the instrument, enhancing the performance of the micro-cylindrically focused logging tool. The optimized design of the focusing method significantly improved the detection performance of the pole plate. This plays an important role in the evaluation of thin layers and oil-water reservoirs. |
| first_indexed | 2024-04-10T09:24:50Z |
| format | Article |
| id | doaj.art-e04efa0af9a74bbd9895ae416a7cbcb5 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T09:24:50Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-e04efa0af9a74bbd9895ae416a7cbcb52023-02-20T06:48:38ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-02-011110.3389/feart.2023.11322521132252Research and application of high-resolution micro-cylindrically focused logging toolJigen Xia0Jigen Xia1Zhiqiang Li2Zhiqiang Li3Yongli Ji4Yongli Ji5Hengrong Zhang6Fangong Li7Fangong Li8Junyi Li9Junyi Li10Xingmeng Dong11Xingmeng Dong12China Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaChina Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaChina Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaCNOOC Limited, Zhanjiang, Guangdong, ChinaChina Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaChina Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaChina Research Institute of Radio Wave Propagation, Xinxiang, Henan, ChinaNational Key Laboratory of Electromagnetic Environment, Qingdao, Shandong, ChinaThe unknown nature and complexity of non-uniform formations cause new difficulties and challenges to the accurate detection of electrical instruments in shallow formations. The micro-cylindrically focused logging tool (MCFL) can provide three original measurement curves, RB0, RB1, and RB2, with different detection depths, which reflect the flushing zone resistivity, mudcake resistivity, and mudcake thickness. In this study, the finite element method was used to model and analyze the micro-cylindrically focused logging tool tool in a three-dimensional non-uniform medium model. By converting the partial differential equation into a generalized polar problem, the logging response characteristics of the micro-cylindrically focused logging tool tool at different detection depths and ranges, mudcake thicknesses, flush zones, and mudcake resistivity contrasts were investigated. Inverse processing of the micro-cylindrically focused logging tool data using the least-squares method was used to obtain the flush zone resistivity, mudcake resistivity, and mudcake thickness, based on which the micropotential and microgradient curves were synthesized. In addition, a digital focusing method was proposed to improve the focusing accuracy and flexibility of the instrument, enhancing the performance of the micro-cylindrically focused logging tool. The optimized design of the focusing method significantly improved the detection performance of the pole plate. This plays an important role in the evaluation of thin layers and oil-water reservoirs.https://www.frontiersin.org/articles/10.3389/feart.2023.1132252/fullmicro-cylindrically focused loggingnon-uniform mediaapparent resistivityfinite elementlog inversiondigital focus |
| spellingShingle | Jigen Xia Jigen Xia Zhiqiang Li Zhiqiang Li Yongli Ji Yongli Ji Hengrong Zhang Fangong Li Fangong Li Junyi Li Junyi Li Xingmeng Dong Xingmeng Dong Research and application of high-resolution micro-cylindrically focused logging tool Frontiers in Earth Science micro-cylindrically focused logging non-uniform media apparent resistivity finite element log inversion digital focus |
| title | Research and application of high-resolution micro-cylindrically focused logging tool |
| title_full | Research and application of high-resolution micro-cylindrically focused logging tool |
| title_fullStr | Research and application of high-resolution micro-cylindrically focused logging tool |
| title_full_unstemmed | Research and application of high-resolution micro-cylindrically focused logging tool |
| title_short | Research and application of high-resolution micro-cylindrically focused logging tool |
| title_sort | research and application of high resolution micro cylindrically focused logging tool |
| topic | micro-cylindrically focused logging non-uniform media apparent resistivity finite element log inversion digital focus |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1132252/full |
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