Correction Method for Logging Curves in Clay-Rich Tight Glutenite Reservoir: Upper Wuerhe Formation in Mahu Oilfield, China

Linsheng Wang, Qian Xiong, Qingping Jiang, Zhifeng Wang (), Zigang Qiu, Kai Liu, Chuixian Kong, Canhua Liu and Xiaoli Zhang
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Linsheng Wang: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Qian Xiong: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Qingping Jiang: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Zhifeng Wang: Seiser Energy Technology (Beijing) Co., Ltd., Beijing 100102, China
Zigang Qiu: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Kai Liu: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Chuixian Kong: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Canhua Liu: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Xiaoli Zhang: Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, China

Energies, 2022, vol. 15, issue 19, 1-17

Abstract: Mahu Oilfield is the largest tight glutenite oilfield in the world, and the upper Wuerhe formation is an important succeeding exploration horizon. However, the upper Wuerhe formation in the Mahu 1 zone has a high clay content, which can lead to serious wellbore collapse. Meanwhile, the horizontal well logging is not corrected. These factors lead to the inconsistency between the logging interpretation results and the oil test results. The interpretation precision of the clay content, water saturation, and porosity, which are crucial to reservoir evaluation, is very low. In this paper, a workflow of logging curve correction using multiple methods is proposed. The multiple linear fitting is used to correct boreholes, and then histogram frequency distribution matching is used to standardize multi-well logging curves. Finally, the optimization method is used to build a volume model based on skeleton analysis, and the results are calibrated with core analysis results. Horizontal well density logs are corrected using adjacent vertical well logs. The interpretation results of clay content, water saturation, and porosity with high precision are obtained. The reservoir interpretation is more in line with the oil test results than the original interpretation. The clay content distribution is more reasonable.

Keywords: glutenite reservoir; correction for logging curve; borehole enlargement; clay content; horizontal well (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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