Abstract
To meet the needs of oilfield strategic planning and reservoir management, a new method for development evaluation of waterflooding reservoir was established. Five key indexes are determined by analyzing the existing index system, screening from the main development indexes by methods such as logical analysis and correlation analysis, and studying the matching rules among the development indexes and reservoir geological characteristics, development characteristics, and development stages. Moreover, methods were proposed for determining the reasonable boundaries, the membership functions and the weights of evaluation indexes. Finally, a comprehensive evaluation method of multi-indexes was established. This paper first proposes the stage definition of evaluation indexes, the method for determining the respective evaluation criteria, and evaluating the development effects according to the different development stage, which make the results more reasonable.
Copyright 2017, Shaanxi Petroleum Society.
This paper was prepared for presentation at the 2017 International Field Exploration and Development Conference in Chengdu, China, 21–22 September 2017.
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Abbreviations
- R k :
-
The recovery percent of recoverable reserves;
- f w :
-
Water cut;
- S wi :
-
Irreducible water saturation;
- S or :
-
Residual oil saturation;
- K ro :
-
The relative permeability of oil phase;
- A, B:
-
Fitting coefficients;
- J oD :
-
Average dimensionless oil recovery index of single well;
- J oDmax :
-
The maximum dimensionless oil production index of the average single well;
- v or :
-
Oil production rate of recoverable reserves;
- Δfw:
-
The annual water cut up speed;
- b :
-
The fitting coefficient;
- y i :
-
Technology policy rationality of comprehensive evaluation value;
- W :
-
The index weight;
- IR:
-
Reasonable degree of injection & production technical index;
- I :
-
Reservoir number;
- J :
-
Evaluation index number;
- R(Ii):
-
The membership function of the level of the index;
- I i :
-
The value of the first i evaluation index;
- a 1 :
-
The threshold of the first evaluation index;
- a 2 :
-
The threshold of the second evaluation index;
- rij (Ii):
-
The first i evaluation index in the first j threshold interval evaluation index membership value;
- r0i:
-
Correlation evaluation index sequence i and recovery rate of female sequence 0;
- Y :
-
The comprehensive evaluation matrix of the four indexes to be evaluated;
- W :
-
The weight matrix of the evaluation index;
- R :
-
The membership matrix of the evaluation index.
References
Ding Q (2009) Typical blocks of LaSaXing Oilfield water flooding development effect evaluation method. Daqing Petroleum Institute
Luo Y (2005) Evaluation index and method of water flooding development effect in low permeability sandstone reservoir. Southwest Petroleum University
Sun W (2006) Study on the evaluation system and method of oilfield development in high water cut stage. China University of Petroleum
Guo M, Xiao L, Zhang WJ (2008) The relative permeability curve characteristics, influencing factors and their effects on the development of low permeability sandstone reservoirs. Acta sedimentary Sinica 26(3):440–451
Wang G, Xie J et al (2004) Reservoir relative permeability curve morphology and exploitation characteristics. Xinjiang petrol Geol 25(3):301–305
Wang S, Liu L et al (2011) The infiltration and seepage characteristics of Triassic reservoir in Changqing Oilfield. J Yangtze Univ (Nat Sci Ed) 8(5):55–57
Acknowledgments
This paper is supported by the national science and technology major project “Domestic oil and gas development and strategy research (2016ZX05016-006).”
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Feng, J., Luo, R., Tang, W., Zhang, H., Liu, T., Wang, D. (2019). A New Method for Development Evaluation of Waterflooding Reservoirs. In: Qu, Z., Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2017. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-7560-5_129
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DOI: https://doi.org/10.1007/978-981-10-7560-5_129
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