Forward modeling of tight sandstone permeability based on mud intrusion depth and its application in the south of the Ordos Basin
Liu Wen-hui, Lv Xiao-Chun, and Shen Bo
1. North China University of Water Resources and Electric Power, College of Geosciences and Engineering, Zhengzhou 450045, China.
2. Yangtze University, Geophysics and Oil Resource Institute, Wuhan 430010, China.
Abstract Permeability is an important index in reservoir evaluation, oil and gas accumulation control, and production effi ciency. At present, permeability can be obtained through several methods. However, these methods are not suitable for tight sandstone in general because the pore type in tight sandstone is mainly secondary pores and has the characteristics of low porosity and permeability, high capillary pressure, and high irreducible water saturation. Mud invasion depth is closely related to permeability during drilling. In general, the greater the permeability, the shallower the mud invasion depth, and the smaller the permeability, the deeper the mud invasion depth. Therefore, this paper builds a model to predict the permeability of tight sandstone using mud invasion depth. The model is based on the improvement of the Darcy fl ow equation to obtain permeability using mud invasion depth inversion of array induction logging. The influence of various permeability factors on the model is analyzed by numerical simulation. The model is used to predict the permeability of tight sandstone in the south of the Ordos Basin. The predicted permeability is highly consistent with the core analysis permeability, which verifi es the reliability of the method.
About author: Liu Wen-Hui, a senior engineer, received his Master’s degree from the Geophysics and Oil Resource Institute of Yangtze University in 2009, and his Ph.D. degree from the Institute of Geophysics and Geomatics of China University of Geosciences (Wuhan) in 2016. Since 2016, he has worked in the College of Geosciences and Engineering of North China University of Water Resources and Electric Power. His main research interests include geophysical logging and engineering geophysical prospecting.
Contact information:Email: liuwenhui@ncwu.edu.cn
Cite this article:
. Forward modeling of tight sandstone permeability based on mud intrusion depth and its application in the south of the Ordos Basin[J]. APPLIED GEOPHYSICS, 2021, 18(3): 277-287.
2021, Vol. 18 
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