Logging while drilling electromagnetic wave responses in inclined bedding formation
For real-time inversion and fast reconstruction of formation true resistivity, the forward modeling of electromagnetic wave logging while drilling is usually based on the transversely isotropic formation model with vertical symmetry axis (VTI medium), but it only considers the horizontal and vertica...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2019-08-01
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| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380419602284 |
| _version_ | 1818651993998098432 |
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| author | Yiren FAN Xufei HU Shaogui DENG Xiyong YUAN Haitao LI |
| author_facet | Yiren FAN Xufei HU Shaogui DENG Xiyong YUAN Haitao LI |
| author_sort | Yiren FAN |
| collection | DOAJ |
| description | For real-time inversion and fast reconstruction of formation true resistivity, the forward modeling of electromagnetic wave logging while drilling is usually based on the transversely isotropic formation model with vertical symmetry axis (VTI medium), but it only considers the horizontal and vertical resistivity. It has certain limitation during practical application. This paper presents a forward calculation method of electromagnetic wave logging while drilling in transversely isotropic (TTI) strata with inclined symmetry axis based on the Dyadic Green's function. Anisotropic angle and azimuth are used to characterize TTI formation. The proposed algorithm is verified by numerical examples, the half-space electromagnetic wave reflection and transmission characteristics with different media are analyzed, and the necessity to use the new algorithm is pointed out. Numerical simulation also shows that there exist a critical borehole dip and critical anisotropic angle in TTI formation. Electromagnetic wave logging while drilling responses follows opposite rule before and after these two critical angles. Besides, the “horns” at the interface are not only related to well deviation, resistivity contrast, but also related to anisotropic angle and anisotropic azimuth. Key words: electromagnetic wave logging while drilling, VTI medium, TTI medium, anisotropic dip, anisotropic azimuth, Dyadic Green's function |
| first_indexed | 2024-12-17T02:14:57Z |
| format | Article |
| id | doaj.art-eed6c59eb27e4f16942fa203f954e538 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-17T02:14:57Z |
| publishDate | 2019-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-eed6c59eb27e4f16942fa203f954e5382022-12-21T22:07:27ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042019-08-01464711719Logging while drilling electromagnetic wave responses in inclined bedding formationYiren FAN0Xufei HU1Shaogui DENG2Xiyong YUAN3Haitao LI4School of Geosciences, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Deep Oil & Gas Geology and Exploration, Ministry of Education, China University of Petroleum, Qingdao 266580, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; CNPC Key Laboratory for Well Logging, China University of Petroleum, Qingdao 266580, ChinaChina University of Petroleum-Beijing at Karamay, Karamay 834000, China; Corresponding authorSchool of Geosciences, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Deep Oil & Gas Geology and Exploration, Ministry of Education, China University of Petroleum, Qingdao 266580, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; CNPC Key Laboratory for Well Logging, China University of Petroleum, Qingdao 266580, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Deep Oil & Gas Geology and Exploration, Ministry of Education, China University of Petroleum, Qingdao 266580, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; CNPC Key Laboratory for Well Logging, China University of Petroleum, Qingdao 266580, ChinaSchool of Geosciences, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Deep Oil & Gas Geology and Exploration, Ministry of Education, China University of Petroleum, Qingdao 266580, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; CNPC Key Laboratory for Well Logging, China University of Petroleum, Qingdao 266580, ChinaFor real-time inversion and fast reconstruction of formation true resistivity, the forward modeling of electromagnetic wave logging while drilling is usually based on the transversely isotropic formation model with vertical symmetry axis (VTI medium), but it only considers the horizontal and vertical resistivity. It has certain limitation during practical application. This paper presents a forward calculation method of electromagnetic wave logging while drilling in transversely isotropic (TTI) strata with inclined symmetry axis based on the Dyadic Green's function. Anisotropic angle and azimuth are used to characterize TTI formation. The proposed algorithm is verified by numerical examples, the half-space electromagnetic wave reflection and transmission characteristics with different media are analyzed, and the necessity to use the new algorithm is pointed out. Numerical simulation also shows that there exist a critical borehole dip and critical anisotropic angle in TTI formation. Electromagnetic wave logging while drilling responses follows opposite rule before and after these two critical angles. Besides, the “horns” at the interface are not only related to well deviation, resistivity contrast, but also related to anisotropic angle and anisotropic azimuth. Key words: electromagnetic wave logging while drilling, VTI medium, TTI medium, anisotropic dip, anisotropic azimuth, Dyadic Green's functionhttp://www.sciencedirect.com/science/article/pii/S1876380419602284 |
| spellingShingle | Yiren FAN Xufei HU Shaogui DENG Xiyong YUAN Haitao LI Logging while drilling electromagnetic wave responses in inclined bedding formation Petroleum Exploration and Development |
| title | Logging while drilling electromagnetic wave responses in inclined bedding formation |
| title_full | Logging while drilling electromagnetic wave responses in inclined bedding formation |
| title_fullStr | Logging while drilling electromagnetic wave responses in inclined bedding formation |
| title_full_unstemmed | Logging while drilling electromagnetic wave responses in inclined bedding formation |
| title_short | Logging while drilling electromagnetic wave responses in inclined bedding formation |
| title_sort | logging while drilling electromagnetic wave responses in inclined bedding formation |
| url | http://www.sciencedirect.com/science/article/pii/S1876380419602284 |
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