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Calculation method of water-through multiples at different parts in core-scale reservoirs

A technology of water pass multiple and calculation method, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., and can solve problems such as difficulties

Active Publication Date: 2018-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through this experiment, many important and useful data can be obtained, such as the relationship between different water penetration ratios and oil displacement efficiency, etc.; however, there are great difficulties in applying these data to actual reservoirs

Method used

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  • Calculation method of water-through multiples at different parts in core-scale reservoirs
  • Calculation method of water-through multiples at different parts in core-scale reservoirs
  • Calculation method of water-through multiples at different parts in core-scale reservoirs

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Embodiment Construction

[0041] 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.

[0042] Such as figure 1 as shown, figure 1 It is a flow chart of the method for calculating the water-through ratio of different parts in the core-scale reservoir based on the present invention.

[0043] In step 101, the streamline equation of the five-point homogeneous model is derived to obtain the streamline distribution in different parts. According to Darcy's law and the principle of potential superposition, the potential of any point in the coordinate area can be obtained; the Cauchy-Riemann condition is satisfied between the flow function and the potential function, and the expression of the flow function can be obtained according to the expression of the potential function, that is, five points Normal well pattern streamline equation: ...

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Abstract

The invention provides a calculation method for rock-core-dimension-based water passing multiples of different positions in an oil reservoir. The calculation method for the rock-core-dimension-based water passing multiples of the different positions in the oil reservoir comprises the steps that 1, a five-spot method homogeneous model streamline equation is derived, and streamline distribution of the different positions is obtained; 2, a distribution method for flow between injection and production wells as well as between streamlines is established, and flow distribution of the different positions is obtained; 3, the rock-core-dimension-based water passing multiples, of different positions along the streamlines, of a one-dimensional homogeneous model are calculated; and 4, the water passing multiples, of different positions along the streamlines, of a five-spot method homogeneous model are calculated. According to the calculation method for the rock-core-dimension-based water passing multiples of the different positions in the oil reservoir, abundant data of laboratory tests are fully used for accurately describing the water passing multiples of the different positions in the oil reservoir, displacement degrees of the different positions of the oil reservoir are represented quantitatively, and a solid foundation is laid for formulating mine field development and adjustment technical measures.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a numerical simulation model or a method for calculating the water-through ratio of different parts of the core scale under a certain injection ratio of a numerical simulation model or an actual oil reservoir. Background technique [0002] The water injection multiple is the ratio of the total cumulative injection amount of the reservoir to the pore volume of the reservoir, reflecting the macroscopic water flooding status of the reservoir; the water flow multiple is the ratio of the total cumulative injection amount of the conventional core (Φ2.5cm×5cm) to the core pore volume The ratio of , reflects the microscopic water flooding condition. The water passing multiple under indoor physical experiment conditions is not the same concept as the water injection multiple of the entire reservoir in the traditional sense, and cannot be directly applied to mine development p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20
Inventor 张以根苏映宏张海燕邴绍献崔传智徐永春孙成龙梁保红李东玻王华颜子
Owner CHINA PETROLEUM & CHEM CORP
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