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Automatic injection allocation method of layered water injection system

A layered water injection, automatic technology, applied in earthwork drilling, wellbore/well components, design optimization/simulation, etc., can solve problems such as reducing adjustment time, reduce adjustment times, reduce economic losses, and improve adjustment efficiency. Effect

Inactive Publication Date: 2021-04-30
HARBIN UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a new type of automatic allocation method for layered water injection system, which is used to solve the problem of layer adjustment and flow adjustment when the injection volume of water injection layer in layered water injection does not meet the standard, reduce adjustment time, and improve water injection efficiency

Method used

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  • Automatic injection allocation method of layered water injection system
  • Automatic injection allocation method of layered water injection system
  • Automatic injection allocation method of layered water injection system

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Embodiment Construction

[0062] The example method of the present invention is specifically described below in conjunction with accompanying drawing:

[0063] An automatic dispensing method for a layered water injection system, comprising the following steps:

[0064] S1: Use the entropy weight method to calculate the information entropy H corresponding to the water injection parameters, the information utility value d, and the weight W corresponding to each water injection parameter, and finally calculate the comprehensive evaluation value F of each layer, and divide the layers according to the evaluation value;

[0065] S2: In S1, the detailed adjustment sequence of water injection well layers is obtained, and then the Gaussian weighted KNN algorithm is used to predict the optimal valve opening value when each layer reaches the target flow value, and the flow is adjusted by adjusting the valve opening;

[0066] S3: Design an automatic dispensing method, and automatically adjust the water injection v...

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Abstract

The invention relates to an automatic injection allocation method of a layered water injection system. The automatic injection allocation method is used for solving the problem that when the injection allocation amount of a water injection layer section in layered water injection does not reach the standard, the injection allocation amount reaches the standard through adjustment of the layer section and flow. According to the technical scheme, relevant parameter information influencing the daily injection allocation amount is collected, an entropy weight method in comprehensive evaluation is applied to convert multiple water injection parameters into information capable of reflecting the overall characteristics of water injection conditions of different layer sections, real-time water injection flow adjustment priorities are divided, a Gaussian weighted KNN algorithm is utilized for flow adjustment, and therefore an adjustment scheme is made, the actual daily injection allocation amount reaches the specified standard, the adjustment frequency is reduced, and losses of a valve are reduced. The automatic injection allocation method solves the problem of blindness of layer section selection during traditional adjustment, also solves the problems that the interference of the water injection layer adjustment layer section is large, and economic losses are large due to repeated adjustment, and achieves the purpose of rapidly adjusting the layer section when the daily injection allocation amount of layered water injection does not reach the standard.

Description

technical field [0001] The invention belongs to the technical field of oil fields, and relates to an automatic dispensing method for a layered water injection system, which is used for automatic dispensing of water injection wells under the condition of meeting the water injection qualification rate requirements. Background technique [0002] Layered water injection technology is to divide the water injection well into multiple water injection intervals according to the nature of the formation, and each interval has corresponding water injection equipment for injection. Through this water injection method, the water content of the oil layer is increased, and the oil production of the oil well is increased. However, with the continuous expansion of water injection demand, water injection projects are facing some new problems: (1) The number of separate injection wells increases year by year, the test workload is heavy, the cost is high, and the on-site test burden is heavy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B43/14G06F30/20
CPCE21B43/20E21B43/14G06F30/20
Inventor 王海英吴枫
Owner HARBIN UNIV OF SCI & TECH
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