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Sandstone bottom water reservoir water cone quantitative-description method

A bottom-water reservoir, quantitative description technology, applied in the direction of measurement, earthwork drilling, production fluid, etc., can solve difficult problems such as poor oil-water density, vertical and horizontal permeability ratio without consideration

Inactive Publication Date: 2015-07-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0002] Many domestic experts have studied the water coning description methods of sandstone bottom water reservoirs, mostly based on the statics principle and the motion law equation of subsurface fluid, and established the analytical model and solution method of water cone shape in bottom water reservoirs, without considering the vertical direction. Influenced by factors such as horizontal permeability ratio, well spacing, fluid production rate, oil layer thickness, radiation avoidance, oil-water viscosity ratio, oil-water density difference, etc., it is difficult to solve the water cone problem in sandstone bottom water reservoirs in specific blocks

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[0077] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0078] Such as figure 1 as shown, figure 1 It is a flow chart of the method for quantitatively describing water cone in sandstone bottom water reservoirs of the present invention.

[0079] In step 101, according to the geological and dynamic conditions of the reservoir, collect the characteristic parameters of the reservoir, such as oil-water density difference, oil-water viscosity ratio, well spacing, daily liquid production, water cut, oil layer thickness, radiation avoidance height, vertical permeability , horizontal permeability, etc. The process goes to step 102.

[0080] In step 102, the corresponding water cone or water ridge description model formula is selected according to the well type. In the following formulas, formulas (1) to (4) ...

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Abstract

The invention provides a sandstone bottom water reservoir water cone quantitative-description method. The sandstone bottom water reservoir water cone quantitative-description method comprises the steps of 1 collecting an oil reservoir characterization parameter of a researched oil reservoir, 2 describing a model formula by selecting a corresponding water cone or a water ridge according to well type and 3 utilizing the selected water cone or the water ridge to describe the model formula and calculate the morphological parameter and volume of the water cone or the water ridge. By means of the sandstone bottom water reservoir water cone quantitative-description method, the morphologies of the water cone or the water ridge of the oil reservoir at different position in different periods can be predicted, and the residual oil distribution rule of the sandstone bottom water reservoir can be determined. The sandstone bottom water reservoir water cone quantitative-description method has the advantages of being high in prediction success rate, simple and convenient to used and practical.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for quantitatively describing water cones in sandstone bottom water reservoirs. Background technique [0002] Many domestic experts have studied the water coning description methods of sandstone bottom water reservoirs, mostly based on the statics principle and the motion law equation of subsurface fluid, and established the analytical model and solution method of water cone shape in bottom water reservoirs, without considering the vertical direction. Influenced by factors such as horizontal permeability ratio, well spacing, fluid production rate, oil layer thickness, radiation avoidance, oil-water viscosity ratio, and oil-water density difference, it is difficult to solve the water cone problem in sandstone bottom water reservoirs in specific blocks. For this reason, we invented a new quantitative description method of water cone in sandstone bottom water r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/10E21B43/12
CPCE21B47/10
Inventor 杨勇王建程会明刘维霞吴义志玄建薛玉荣李文静胡罡孙宁宁杨姝
Owner CHINA PETROLEUM & CHEM CORP
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