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| Multimineral optimization processing method based on elemental capture spectroscopy logging | |
| 基金项目： | This work was sponsored by the National S＆T Major Special Project （No. 2011ZX05020-008）. |
| 摘 要： | Calculating the mineral composition is a critical task in log interpretation. Elementalcapture spectroscopy （ECS） log provides the weight percentages of twelve common elements,which lays the foundation for the accurate calculation of mineral compositions. Previousprocessing methods calculated the formation composition via the conversion relation betweenthe formation chemistry and minerals. Thus, their applicability is limited and the methodprecision is relatively low. In this study, we present a multimineral optimization processingmethod based on the ECS log. We derived the ECS response equations for calculating theformation composition, then, determined the logging response values for the elements ofcommon minerals using core data and theoretical calculations. Finally, a software modulewas developed. The results of the new method are consistent with core data and the meanabsolute error is less than 10%. |
| 关 键 词： | ECS log optimization multimineral lithological profile |
Multimineral optimization processing method based on elemental capture spectroscopy logging |
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| Authors: | Zhou Feng Xin-Tong Li Hong-Liang Wu Shou-Ji Xia Ying-Ming Liu |
| Institution: | 1. Research Institute of Petroleum Exploration and Development of Petro China, Beijing, 100083, China 2. School of Earth and Space Sciences, Peking University, Beijing, 100871, China 3. School of GeoScience, University of Edinburgh, Edinburgh, EH9 3JN, UK |
| Abstract: | Calculating the mineral composition is a critical task in log interpretation. Elemental capture spectroscopy (ECS) log provides the weight percentages of twelve common elements, which lays the foundation for the accurate calculation of mineral compositions. Previous processing methods calculated the formation composition via the conversion relation between the formation chemistry and minerals. Thus, their applicability is limited and the method precision is relatively low. In this study, we present a multimineral optimization processing method based on the ECS log. We derived the ECS response equations for calculating the formation composition, then, determined the logging response values for the elements of common minerals using core data and theoretical calculations. Finally, a software module was developed. The results of the new method are consistent with core data and the mean absolute error is less than 10%. |
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