Calculation method of oil production in block under gas flooding co2 and n2 development mode

A technology of calculation method and development method, which is applied in the direction of mining fluid, earthwork drilling, climate sustainability, etc., can solve the problems of low accuracy and achieve the goal of improving accuracy, reducing workload, reducing estimation and referring to analogy errors Effect
CN110410044BActive Publication Date: 2022-07-08CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2022-07-08

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Abstract

The present invention provides a gas-driven CO 2 , N 2 The method for calculating the oil production of the block under the development mode includes: step 1, using the minimum miscible pressure experiment or long core flooding experiment to determine the gas-flooding oil displacement efficiency Edg under different pressure levels; step 2, calculating the residual oil under different development stages Saturation Sor; Step 3, use the reservoir engineering method to calculate the water flooding wave Evw and coefficient and gas flooding sweep coefficient Evg; Step 4, predict the water flooding production Qw` in the same period according to the reservoir engineering method; Step 5, calculate the water flooding according to the above results Block-to-gas flooding production. The gas drive CO of the present invention 2 , N 2 The oil production calculation method of the block under the development mode is based on laboratory experiments and reservoir engineering, and through certain calculations and analysis, the oil production of the gas drive block is obtained, which solves the long-term basis for production calculation. Conversion and estimation, and unreasonable mineral production allocation. It provides the possibility for more accurate and efficient preparation of gas flooding development plan, mine production allocation and gas flooding potential evaluation.
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Description

technical field

[0001] The present invention relates to gas drive CO 2 , N 2 Technical field, specifically relates to a gas drive CO 2 , N 2 Calculation method of block oil production under development mode. Background technique

[0002] Gas drive CO 2 , N 2 Technology is one of the most important and popular technologies for oil and gas field development to enhance oil recovery. Gas flooding production calculation is an important research content of this technology. With the help of laboratory experiments and reservoir theoretical calculation methods, gas flooding production calculation can be better carried out. The size of the oil production when the water flooding reservoir is converted to gas flooding is mainly based on the multiple of gas flooding oil displacement efficiency, the multiple of gas flooding sweep coefficient, and the multiple of remaining oil saturation when switching to gas flooding. These parameters are calculated by laboratory experiments and res...

Claims

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