Method and device for determining well pattern and well spacing of oil reservoir

Abstract

The invention provides a method and a device for determining the well pattern and well spacing of an oil reservoir well. The method for determining the well pattern and well spacing of the oil reservoir well comprises the following steps: comparing stratums of the overall oil reservoir and dividing sedimentary facies and stratum types; by selecting a sedimentary face and stratum type planar combination mode, calculating water-flooding control levels of different injection-production well patterns corresponding to different sedimentary face and stratum type planar combination modes; determining the sedimentary face and stratum type planar combination mode of different stratum positions of a to-be-measured area and geological reserves at different planar combination modes; calculating the integral water-flooding control level of the to-be-measured area at different injection-production well pattern conditions based on the geological reserves and the water-flooding control levels of different injection-production well patterns; drawing a curve chart of the integral water-flooding control level of the to-be-measured area and the total well amount at different well patterns and different well spacing, and determining the well pattern and the well spacing of the oil reservoir of the to-be-measured area according to the curve chart. By the device and the method disclosed by the invention, reasonable well pattern and well spacing of the oil reservoir are determined; meanwhile, the device and the method are combined with numerical simulation research results to improve the accuracy and reliability of evaluation results.

Description

technical field [0001] The invention relates to the technical field of well pattern and well spacing of oil reservoirs, in particular to a method and device for determining well pattern and well spacing of oil reservoirs. Background technique [0002] Reasonable well pattern and well spacing are the key technical countermeasures for efficient reservoir development, a development technical countermeasure that must be demonstrated in detail in the reservoir development plan, and a technical problem that has plagued scientific researchers for many years. For the demonstration of reasonable well pattern and well spacing in the development plan, in addition to using empirical formulas or analogy methods for demonstration, numerical simulation methods are generally used for detailed demonstration, and the reliability of the demonstration results depends on the reliability of the geological model and numerical simulation. The level of researchers, so this method also has certain li...

AI Technical Summary

Problems solved by technology

For the demonstration of reasonable well pattern and well spacing in the development plan, in addition to using empirical formulas or analogy methods for demonstration, numerical simulation methods are generally used for detailed demonstration, and the reliability of the demonstration results depends on the reliability of the geological model and numerical simulation. The level of researchers, so this method also has certain limitations and uncertainties, and sometimes it is difficult to obtain reliable results

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