Abstract
The determination of reasonable well spacing in water drive reservoir is the key to the design of oilfield development scheme. However, due to the huge difference of reservoir geological conditions in China, the well pattern deployment mode also changes with the development degree. The existing reasonable well spacing determination methods generally have the problems of narrow application range and poor accuracy. Therefore, this paper proposes a method to determine reasonable well spacing based on multiple regression analysis. Firstly, according to the material balance equation, the adaptability of the existing well pattern is evaluated in combination with the degree of oilfield development and water invasion. Then, based on the consideration of reservoir geological conditions and well pattern characteristics, Pearson correlation analysis was used to screen out the main control factors affecting oil recovery, and the extended data samples of numerical simulation were analyzed, and the expression of multiple regression model was obtained. Finally, the reasonable well spacing is determined by predicting the recovery ratio and net present value. The results show that the recovery ratio of edge water reservoir is linear with well spacing, and the recovery ratio of bottom water reservoir is quadratic with well spacing. The prediction accuracy of the model is as high as 98.36%, and the prediction accuracy can meet the needs of the mine.
Copyright 2022, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2022 International Field Exploration and Development Conference in Xi’an, China, 16–18 November 2022.
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Abbreviations
- n :
-
number of wells
- μ o :
-
viscosity of crude oil, mPa·s
- k xy :
-
plane permeability, mD
- k z :
-
vertical permeability, mD
- F d :
-
reserve abundance, 104 m3/km2
- L well :
-
well length, m
- D well :
-
well spacing, m
- R S :
-
simulation value, %
- R A :
-
analysis value, %
- ∆ :
-
deviation, %
- NPV :
-
net present value, RMB yuan
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (No. 51974341), and the Fundamental Research Funds for the Central Universities (No. 20CX06070A).
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Yao, Cj., Qi, Jl., Cheng, Tx., Liu, Yg., Gu, Jw. (2023). Study on Determination Method of Reasonable Well Spacing in Water Drive Reservoir Based on Multiple Regression Analysis. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2022. IFEDC 2022. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-1964-2_306
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DOI: https://doi.org/10.1007/978-981-99-1964-2_306
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