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A Method for Estimating the Drainage Area of ​​Development Wells

A technology for oil drainage area and development wells, which is applied in the field of oil and gas exploration, and can solve problems such as the inability to effectively eliminate the impact of production changes

Active Publication Date: 2021-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

However, in the existing technology, when determining the drainage area of ​​a single well, directly using the original production data to cast points on the production decline chart cannot effectively eliminate the impact of production changes caused by non-geological factors, which will directly affect Accuracy of parameter reading

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  • A Method for Estimating the Drainage Area of ​​Development Wells
  • A Method for Estimating the Drainage Area of ​​Development Wells
  • A Method for Estimating the Drainage Area of ​​Development Wells

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The main core idea of ​​the present invention is to analyze the production decline pattern according to the actual production data of the development well in the low-permeability development block, and thus set up the production curve, and then read the reservoir half-length ( That is, the parameters related to the oil drainage radius), and the oil drainage area is estimated according to the relevant formula.

[0028] Such as figure 1 As shown, the method for estimating the oil drainage area of ​​the development well provided by the present invention may include five major steps.

[0029] Step S101: sort out the production data of the development wells.

[0030] Under normal circumstances, the production data of development wells have certain rules, and with the c...

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Abstract

The invention discloses a method for estimating the oil drainage area of ​​a development well. This method uses the actual production data of the development well to simulate the production decline, puts the simulated production decline curve of the development well into the designated Fetkovich chart, and calculates the correlation between the oil drainage radius and the drainage area of ​​the development well by comparing the production decline curve with the chart. parameters, and then calculate the drainage area of ​​the development well according to the calculation formula of the drainage area of ​​the vertical well or the horizontal well. This method is fast and convenient, and can intuitively compare the production decline curve with the existing chart in the early stage of production to obtain the relevant parameters for calculating the drainage radius, thereby calculating the drainage radius and drainage area of ​​the development well.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for estimating the oil drainage area of ​​a development well. Background technique [0002] The oil drainage area refers to the oil supply area of ​​each oil production well, and the oil drainage radius (oil supply radius) refers to the radius of a circle with the same oil supply area of ​​each oil production well. Sometimes the distance between two oil production wells can also be simply divided. The radius is regarded as the fuel supply radius. In the prior art, there are usually two methods for calculating the oil drainage radius of the development well in the development block: one is to calculate the pressure sweep range by using the principle of fluid mechanics according to the pressure change, and then estimate the oil drainage radius of the development well; the other is to calculate the oil drainage radius of the development well according to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02G06F17/10
CPCG06F17/10G06Q50/02
Inventor 盛秀杰王义刚吴博
Owner CHINA PETROLEUM & CHEM CORP
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