Method and equipment for determining reservoir permeability
A technique for determining the method and permeability, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as low calculation efficiency and low accuracy of reservoir permeability
Active Publication Date: 2018-06-01
PETROCHINA CO LTD
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[0005] In order to solve the problem of low accuracy and low calculation efficiency of reservoir permeability, the present invention provides a method and equipment for determining reservoir permeability
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[0067] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0068] Differential evolution algorithm is a self-organizing minimization method of group evolution. Differentially evolved individuals are the key factors in simulating biological evolution. Each individual corresponds to a set of solutions in practical applications. The collection of all individuals is the population. Perform several evolutionary processes to obtain the best individual, that is, the optimal solution. Assuming that the evolution process is performed once, the next generation population can be obtained by performing the evolution process on the population, and then the best individual can be obtained from the next generation population. Specifically, each evolutionary process interferes with the existing target individual thr...
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The invention discloses a method and equipment for determining reservoir permeability, belonging to the field of petroleum logging data interpretation. The method includes: determining the reservoir permeability model and the value range of the model coefficient; determining multiple reservoirs with different model coefficients Layer permeability model, the model coefficient of each reservoir permeability model is recorded as an individual in the adaptive differential evolution algorithm, and the set of all individuals is recorded as the initial population in the adaptive differential evolution algorithm; determine the fitness value model; obtain sample data ; Determine the fitness value of each individual; Determine the target reservoir permeability model coefficient; Determine the target reservoir permeability model; Determine the new permeability value according to the target reservoir permeability model and the new permeability model parameter value. The invention solves the problem of low accuracy and low calculation efficiency of the reservoir permeability, realizes the effect of improving the accuracy and calculation efficiency of the reservoir permeability, and is used for determining the reservoir permeability.
Description
Technical field [0001] The invention relates to the field of oil logging data interpretation, in particular to a method and equipment for determining reservoir permeability. Background technique [0002] Reservoir permeability is one of the important parameters for reservoir research. Reservoir permeability is a parameter that measures the ability of the rock itself to allow fluid to pass under a certain pressure difference. Determining reservoir permeability is the basis for establishing reservoir geological models, estimating oil and gas reserves, and determining development plans. In practical applications, reservoir permeability models are mainly used to determine reservoir permeability. Because reservoir permeability includes adjustable Therefore, in order to determine the reservoir permeability, it is necessary to effectively determine the model coefficients in the reservoir permeability model. [0003] In the prior art, in the process of determining the reservoir permeabili...
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IPC IPC(8): G06F17/50
Inventor 韩学锋刘建敏徐欢
Owner PETROCHINA CO LTD