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A method and system for determining the degree of connectivity between wells

A technology for determining the degree of connectivity and determining the method, which is applied in data processing applications, instruments, complex mathematical operations, etc., can solve problems such as large data matrix, increasing the difficulty of solving, and accuracy that needs to be verified, so as to achieve accurate calculation results and speed up the approach speed effect

Active Publication Date: 2020-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for a large amount of production dynamic data, applying the least squares method will result in a huge data matrix, which increases the difficulty of solving
In addition, the calculated connectivity coefficient is likely to be negative, which is inconsistent with the physical meaning of the actual reservoir, and the accuracy needs to be verified

Method used

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  • A method and system for determining the degree of connectivity between wells
  • A method and system for determining the degree of connectivity between wells
  • A method and system for determining the degree of connectivity between wells

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Embodiment Construction

[0056] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0057] Based on the principle of injection-production balance, the present invention regards the water injection well, the production well and the channels between the wells in the oil reservoir as a complete system, wherein the injection rate of the water injection well can be regarded as the incentive of the system, and the liquid production rate of the production well is The response output of the system, ...

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Abstract

The invention discloses a method for determining an inter-well connectivity degree. The method comprises a step of determining inter-well connectivity; a step of determining a connectivity coefficient: determining the connectivity coefficient of connected inter-wells through establishment of a mathematical model and setting of a constraint condition; a step of establishing an evaluation standard: acquiring the evaluation standard of the connectivity degree of the connected inter-wells according to the connectivity coefficient and a statistical sample distribution range; and a step of determining the inter-well connectivity degree: determining the inter-well connectivity degree according to the connectivity coefficient and the evaluation standard. According to the method for determining the inter-well connectivity degree, the inter-well connectivity coefficient can be solved rapidly and accurately so that the calculation of the inter-well connectivity degree is more accurate.

Description

technical field [0001] The invention belongs to the technical field of oil reservoir development, and in particular relates to a method and system for determining the degree of connectivity between wells. Background technique [0002] Fracture-cavity reservoirs are the main reservoir type in Northwest China. With the continuous development, they have entered the stage of full-scale water injection development. The main problems they face are how to establish the injection-production well pattern and how to adjust the injection-production well pattern after water flooding . In view of the above problems, the research on the connectivity between wells in fractured-cavity reservoirs is mainly divided into two aspects: one is to find out the connectivity between wells, that is, whether the injection-production wells or even the production The problem of how to establish the well pattern; the other is to clearly know the strength of the connection between the injection and produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G06F17/10G06Q50/02
CPCG06F17/10G06F17/18G06Q50/02
Inventor 康志江吕铁张允郑松青赵艳艳张冬丽
Owner CHINA PETROLEUM & CHEM CORP
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