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A New Method for Development Evaluation of Waterflooding Reservoirs

  • Jinde Feng
  • Ruilan Luo
  • Wei Tang
  • Hujun Zhang
  • Ting Liu
  • Donghui Wang
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

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.

Keywords

Waterflooding reservoir Development stage Development evaluation Index system 

Nomenclature

Rk

The recovery percent of recoverable reserves;

fw

Water cut;

Swi

Irreducible water saturation;

Sor

Residual oil saturation;

Kro

The relative permeability of oil phase;

A, B

Fitting coefficients;

JoD

Average dimensionless oil recovery index of single well;

JoDmax

The maximum dimensionless oil production index of the average single well;

vor

Oil production rate of recoverable reserves;

Δfw

The annual water cut up speed;

b

The fitting coefficient;

yi

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;

Ii

The value of the first i evaluation index;

a1

The threshold of the first evaluation index;

a2

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.

Notes

Acknowledgments

This paper is supported by the national science and technology major project “Domestic oil and gas development and strategy research (2016ZX05016-006).”

References

  1. 1.
    Ding Q (2009) Typical blocks of LaSaXing Oilfield water flooding development effect evaluation method. Daqing Petroleum InstituteGoogle Scholar
  2. 2.
    Luo Y (2005) Evaluation index and method of water flooding development effect in low permeability sandstone reservoir. Southwest Petroleum UniversityGoogle Scholar
  3. 3.
    Sun W (2006) Study on the evaluation system and method of oilfield development in high water cut stage. China University of PetroleumGoogle Scholar
  4. 4.
    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):440–451Google Scholar
  5. 5.
    Wang G, Xie J et al (2004) Reservoir relative permeability curve morphology and exploitation characteristics. Xinjiang petrol Geol 25(3):301–305Google Scholar
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    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):55–57Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Jinde Feng
    • 1
  • Ruilan Luo
    • 1
  • Wei Tang
    • 1
  • Hujun Zhang
    • 1
  • Ting Liu
    • 2
  • Donghui Wang
    • 1
  1. 1.Research Institute of Petroleum Exploration & Development, PetroChinaBeijingChina
  2. 2.PetroChina Karamy Petrochemical Co., Ltd.KaramayChina

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