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Method for recognizing reservoir fluid properties based on grey correlation analysis

A technology for reservoir fluid properties and grey correlation analysis, which is applied in the fields of earth-moving drilling, instrumentation, and electrical and digital data processing. Improve the interpretation coincidence rate and avoid the effect of multiple solutions

Inactive Publication Date: 2017-07-28
CNPC BOHAI DRILLING ENG
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Problems solved by technology

[0008] So far, it has not been seen that the gray relational analysis method is comprehensively applied to the evaluation of multi-parameter reservoir fluid properties.

Method used

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  • Method for recognizing reservoir fluid properties based on grey correlation analysis
  • Method for recognizing reservoir fluid properties based on grey correlation analysis
  • Method for recognizing reservoir fluid properties based on grey correlation analysis

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Embodiment Construction

[0050] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] A method for identifying reservoir fluid properties based on gray relational analysis, comprising the steps of:

[0052] 1) Collect the values ​​of six parameters of the strata to be analyzed and the strata to be analyzed as well as the stratum with the conclusion of oil testing that belong to the same oil and gas reservoir, including gas testing, pyrolysis, quantitative fluorescence, porosity, permeability and acoustic time difference; All hydrocarbons in the table represent the gas measurement data, the same as below.

[0053] Table 1. Oil and gas display data table of WA slope

[0054]

[0055] 2) The six parameter values ​​are respectively subjected to dimensionless processing, which specifically includes the following two steps:

[0056] ① Calculate the range of each parameter, that is, the differen...

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Abstract

The invention discloses a method for recognizing reservoir fluid properties based on grey correlation analysis. The method includes the following steps of 1, collecting the six parameter values of gasometry, themolysis, quantitative fluorescence, porosity, permeability and interval transit time of a stratum to be analyzed and stratums with oil test conclusions, wherein the stratum to be analyzed and the stratums with oil test conclusions belong to the same oil and gas reservoir; 2, conducting dimensionless processing on the six parameters; 3, calculating the correlation degree; 4, calculating the weight coefficient of each parameter; 5, conducting weighted summation on three parameters of gasometry, themolysis and quantitative fluorescence of each stratum to obtain the oil and gas abundance index of the stratum, and conducting calculation on the other three parameters to obtain the physical property index; 6, drawing an interpretation chart with the two indexes, and marking areas; 7, calculating the oil and gas abundance index and the physical property index of the stratum to be analyzed, and drawing dots in the interpretation chart, wherein the areas corresponding to the dots represent reservoir fluid properties. According to the method, the reservoir fluid properties are comprehensively evaluated with multiple parameters, so that the limitation and multiplicity of solutions of a single-parameter evaluation method are avoided, and the logging oil-gas-water layer interpretation coincidence rate is increased.

Description

technical field [0001] The invention relates to a method for evaluating fluid properties in oil and gas reservoirs, in particular to a method for identifying reservoir fluid properties based on gray correlation analysis. Background technique [0002] At present, mud logging interpretation and evaluation of oil and gas layers are generally based on gas logging interpretation, comprehensive application of multi-parameters such as cuttings logging, quantitative fluorescence, analysis and testing, and the method of establishing evaluation models or evaluation charts by block and stratification. Identification of laminar fluid properties. [0003] Conventional interpretation methods generally evaluate single-parameter reservoir fluid properties based on the total hydrocarbon value, peak fullness, and components of individual technologies. Due to the difference in nature, with the concealment and complexity of oilfield geological exploration targets increasing, it is difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21B49/00G06Q50/06
CPCE21B49/00G06F30/20G06Q50/06
Inventor 郭素杰姜维寨马友生黎铖周文君张亚宾王秋爱
Owner CNPC BOHAI DRILLING ENG
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