A Method and Computer for Calculating Reservoir Well Testing Permeability Using Well Logging Data
A technology of well logging data and permeability, applied in complex mathematical operations and other directions, can solve the problems of inability to achieve accurate quantitative evaluation of reservoir productivity and inability to accurately reflect the permeability of effective production layers, and achieve continuous evaluation and accurate calculation. Effect
Active Publication Date: 2022-05-27
SHENZHEN BRANCH CHINA NAT OFFSHORE OIL CORP
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[0012] Based on the above analysis, it can be seen that in the quantitative evaluation of actual reservoir productivity, the average value of the absolute permeability of the effective reservoir in the perforated interval obtained by logging interpretation cannot accurately reflect the permeability of the effective production layer. Interpreted permeability is unable to achieve the purpose of accurate quantitative evaluation of reservoir productivity
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[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0042] In view of the poor correlation between the average absolute permeability of the effective reservoir in the perforated interval and the permeability model explained by the well test directly established by the method of statistical regression ( figure 1 ), the accuracy cannot meet the production capacity forecast requirements. This embodiment provides a method for calculating reservoir well-test permeability using well logging data, which can convert the reservoir absolute permeability interpreted by well logging into the well-test-interpreted permeability, so as to continuously evaluate the natural properties of the reservoir. The purpose of capacity size.
[0043] refer to Figure 2 to Figure 7 , this embodiment will be...
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The invention relates to a method and a computer for calculating the well test permeability of a reservoir by using well logging data. The present invention adopts the reservoir grading method to reflect that different grades of reservoirs in the perforated interval have different contributions to productivity, and calculate the perforated interval reservoir by assigning different weight coefficients of absolute permeability to different grades of reservoirs. Finally, the accurate calculation of well test permeability is realized by establishing the functional relationship between synthetic permeability and well test interpretation permeability. This method can convert the absolute reservoir permeability interpreted by well logging into the permeability interpreted by well testing, so as to achieve the purpose of continuously evaluating the natural productivity of the reservoir.
Description
technical field [0001] The invention relates to the field of well logging evaluation of petroleum geological exploration reservoirs, and more particularly, to a method and a computer for calculating reservoir well testing permeability by using well logging data. Background technique [0002] In the field of petroleum geology, a reservoir refers to a rock formation with connected pores that allows oil and gas to be stored and seeped in it, referred to as a reservoir. Quantitative evaluation of reservoir productivity is an important task in the field of petroleum exploration and development. For a long time, well testing analysis has been the most accurate method to obtain productivity. However, due to the limitation of long testing time and high construction cost, well testing can only be It is impossible to obtain the production capacity of each layer of each well when the construction is carried out in the main target layer. Using well logging information to carry out rese...
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IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 王清辉冯进管耀刘君毅杨清潘卫国李纪智
Owner SHENZHEN BRANCH CHINA NAT OFFSHORE OIL CORP