Pore structure effect on reservoir electrical properties and well logging evaluation
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- 作者：Huan-Lin Bian (1) (2) (3)
Ju Guan (3)
Zhi-Qiang Mao (1) (2)
Xiao-Dong Ju (1) (2)
Gui-Qing Han (3)
1. College of Geophysics and Information Engineering ; China University of Petroleum ; Beijing ; 102249 ; China
2. Key Laboratory of Earth Prospect and Information Technology ; China University of Petroleum ; Beijing ; 102249 ; China
3. Geoscience Center of CNPC Great Wall Drilling Company ; Beijing ; 100101 ; China - 关键词：pore structure ; reservoir quality ; resistivity ; low ; resistivity hydrocarbon ; bearing zone ; log evaluation
- 刊名：Applied Geophysics
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：11
- 期：4
- 页码：374-383
- 全文大小：614 KB
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- 出版者：Springer Berlin Heidelberg
- ISSN：1993-0658
文摘
The reservoir pore structure controls the reservoir quality and resistivity response of hydrocarbon-bearing zones and thus, critically affects logging interpretation. We use petrophysical data in three types of reservoir with different pore structure characteristics to show that the complexity of pore structure had a significant effect on the effective porosity and permeability regardless of geological factors responsible for the formation of pore structure. Moreover,, the distribution and content of conductive fluids in the reservoir varies dramatically owing to pore structure differences, which also induces resistivity variations in reservoir rocks. Hence, the origin of low-resistivity hydrocarbon-bearing zones, except for those with conductive matrix and mud filtrate invasion, is attributed to the complexity of the pore structures. Consequently, reservoir-specific evaluation models, parameters, and criteria should be chosen for resistivity log interpretation to make a reliable evaluation of reservoir quality and fluids.