西南石油大学学报(自然科学版) ›› 2016, Vol. 38 ›› Issue (6): 35-48.DOI: 10.11885/j.issn.1674-5086.2015.02.04.05

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Methods of Cutoff Determination and Applicability Analysis in Low Porosity and Low Permeability Reservoir

CUI Yufeng1, WANG Guiwen1,2, SUN Yanhui1, WANG Di1, LI Ruijie1   

  1. 1. College of Geosciences, China University of Petroleum, Changping, Beijing 102249, China;
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Changping, Beijing 102249, China
  • Received:2015-02-04 Online:2016-12-01 Published:2016-12-01

Abstract: Low porosity and low permeability oil and gas reservoir is of huge potential. Cutoff plays a very important role in the process of reservoir evaluation. The domestic and overseas scholars have done a lot of researches, but there still lack method comparison and applicability research. Therefore, after literature review, this paper elaborates the origin and definition of cutoff, and summarizes the influencing factors with examples. On that basis, we summarize three kinds of methods of cutoff determination:methods based on core data, methods based on core and test data, and methods based on logging data. The applicability of each method is illustrated. We suggestthat the methods be selected according to geological backgrounds and data available, and cutoff determination results be tested and supported with different methods. Based on the above research, we analyze the development trends of researches on cutoff pay hoping to lay a foundation for further researches.

Key words: low porosity and low permeability, cutoff, factors, method, applicability

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