Petroleum Science >2015,??Issue 2:??252-263 DOI: https://doi.org/10.1007/s12182-015-0024-y
Numerical simulation of high-resolution azimuthal resistivity laterolog response in fractured reservoirs Open?Access
文章信息
作者：Shao-Gui Deng,Li Li,Zhi-Qiang Li,Xu-Quan He and Yi-Ren Fan
作者單位：
School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China;School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China;China Research Institute of Radiowave Propagation, Xinxiang 453003, Henan, China;China Petroleum Southwest Oil and Gas Field Branch, Chengdu 610051, Sichuan, China;School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China
投稿時間：2014-06-08
引用方式：Deng, SG., Li, L., Li, ZQ. et al. Pet. Sci. (2015) 12: 252. https://doi.org/10.1007/s12182-015-0024-y
文章摘要
The high-resolution azimuthal resistivity
laterolog response in a fractured formation was numerically
simulated using a three-dimensional finite element
method. Simulation results show that the azimuthal
resistivity is determined by fracture dipping as well as
dipping direction, while the amplitude differences between
deep and shallow laterolog resistivities are mainly
controlled by the former. A linear relationship exists
between the corrected apparent conductivities and fracture
aperture. With the same fracture aperture, the deep
and shallow laterolog resistivities present small values
with negative separations for low-angle fractures, while
azimuthal resistivities have large variations with positive
separations for high-angle fractures that intersect the
borehole. For dipping fractures, the variation of the azimuthal
resistivity becomes larger when the fracture
aperture increases. In addition, for high-angle fractures
far from the borehole, a negative separation between the
deep and shallow resistivities exists when fracture aperture
is large as well as high resistivity contrast exists
between bedrock and fracture fluid. The decreasing amplitude
of dual laterolog resistivity can indicate the
aperture of low-angle fractures, and the variation of the
deep azimuthal resistivity can give information of the
aperture of high-angle fractures and their position relative
to the borehole.
laterolog response in a fractured formation was numerically
simulated using a three-dimensional finite element
method. Simulation results show that the azimuthal
resistivity is determined by fracture dipping as well as
dipping direction, while the amplitude differences between
deep and shallow laterolog resistivities are mainly
controlled by the former. A linear relationship exists
between the corrected apparent conductivities and fracture
aperture. With the same fracture aperture, the deep
and shallow laterolog resistivities present small values
with negative separations for low-angle fractures, while
azimuthal resistivities have large variations with positive
separations for high-angle fractures that intersect the
borehole. For dipping fractures, the variation of the azimuthal
resistivity becomes larger when the fracture
aperture increases. In addition, for high-angle fractures
far from the borehole, a negative separation between the
deep and shallow resistivities exists when fracture aperture
is large as well as high resistivity contrast exists
between bedrock and fracture fluid. The decreasing amplitude
of dual laterolog resistivity can indicate the
aperture of low-angle fractures, and the variation of the
deep azimuthal resistivity can give information of the
aperture of high-angle fractures and their position relative
to the borehole.
關鍵詞
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High-resolution azimuthal resistivitylaterolog Fractured reservoir Fracture dipping angle Fracture aperture Fracture dipping direction