Exploitation dynamic calculation method under multilayer joint-exploitation oil deposit fixed liquid volume production condition

A technology of production conditions and calculation methods, applied in the direction of calculation, instrumentation, data processing applications, etc., can solve problems such as difficult to obtain

Active Publication Date: 2017-09-15
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

For reservoirs produced by multi-layer combined production with constant liquid volume, the production pressure difference and the oil production and water production of each small layer are important parameters for reservoir dynamic analysis, but it is usually difficult to obtain

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  • Exploitation dynamic calculation method under multilayer joint-exploitation oil deposit fixed liquid volume production condition
  • Exploitation dynamic calculation method under multilayer joint-exploitation oil deposit fixed liquid volume production condition
  • Exploitation dynamic calculation method under multilayer joint-exploitation oil deposit fixed liquid volume production condition

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specific Embodiment approach

[0023] The steps of the development dynamic calculation method under the condition of constant liquid volume production of the multi-layer co-production oil reservoir are as follows:

[0024] (1) Collect the physical and fluid parameters of each sub-layer reservoir according to the logging interpretation results, high-pressure physical property analysis reports, production dynamic data, etc.;

[0025] (2) Given the average water saturation of the small layer at time n, the water saturation at the outlet end is calculated, and the relative permeability and water content of oil and water are obtained by fitting the phase permeability curve to the partial flow equation;

[0026] (3) Knowing the total liquid production rate and the oil-water relative permeability at time n, iterative trial calculation can obtain the production pressure difference ΔP matching the total liquid production rate of a given single well n ;

[0027] (4) According to the generalized Darcy's law, the liqu...

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Abstract

The invention discloses an exploitation dynamic calculation method under the multilayer joint-exploitation oil deposit fixed liquid volume production condition, and belongs to the technical field of oilfield development. The method comprises the steps: 1, knowing reservoir physical property and fluid parameters of each single layer; 2, knowing the mean water saturation degree of the layers at a moment n, solving the water saturation degree of an outlet, and solving the oil and water relative permeability and water content through a relative permeability curve fitting fractional flow equation; 3 knowing the total liquid production capacity and the oil and water relative permeability at the moment n, and solving a corresponding production pressure difference delta Pn at the moment n under the fixed liquid volume production condition through iteration; 4, solving the liquid production capacity at the moment n through the generalized Darcy's law, and determining the water production capacity and oil production capacity through the water content fwn(Sw2); 5, obtaining the mean water content (shown in the description) at the moment (n+1) according to the material balance law; 6, repeatedly carrying out the steps (2)-(5) till (n+1) is equal to N, and ending the calculation. According to the invention, the method achieves the calculation of the developing dynamic of multilayer joint-exploitation fixed liquid volume production, and can provide guide for the production of an oilfield.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a dynamic calculation method for development under the condition of constant liquid volume production in multi-layer co-production oil reservoirs. Background technique [0002] Sandstone reservoirs deposited in continental facies in my country have many vertical oil layers. In order to reduce production costs, multi-layer commingled production is generally used for development. For reservoirs produced by multi-layer combined production with constant liquid volume, the production pressure difference and the oil production and water production of each small layer are important parameters for reservoir dynamic analysis, but they are usually difficult to obtain. On the basis of considering the start-up pressure gradient of water injection, the present invention adopts the iterative trial algorithm to obtain the production pressure difference matching the given liquid pr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/0637G06Q50/02Y02A10/40
Inventor 崔传智杨勇王建刘维霞张世明王瑞吴义志李荣涛宋志超吴忠维
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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