Method and device for determining critical erosion velocity of injection-production string
A technology for injection-production strings and determination methods, which is applied in the field of injection-production engineering and can solve problems such as low accuracy and limitations
Active Publication Date: 2019-02-15
PETROCHINA CO LTD
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[0004] The embodiment of the present invention provides a method for determining the critical erosion velocity of an injection-production string to solve the technical problems of low accuracy and limitations in determining the critical erosion velocity of an injection-production string in the prior art
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[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0018] In an embodiment of the present invention, a method for determining the critical erosion velocity of an injection-production string is provided, such as figure 1 As shown, the method includes:
[0019] Step 102: Obtain the injection-production condition data related to string erosion of the target well;
[0020] Step 104: digitize the injection-production condition data and input it into the neural network, obtain the information indicating whether the pipe string is eroded outputted by the neural network, and modify the flow velocity in the injection-production condition data multiple ...
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The embodiment of the invention provides a method and a device for determining the critical erosion velocity of an injection-production string, wherein, the method comprises the following steps: acquiring the injection-production working condition data related to the erosion of the string of a target well; After modifying the velocity in the injection-production working condition data for many times, numerically inputting the data of injection-production condition after velocity modification into the neural network, eroding the information indicating whether the pipe string at each modified velocity is obtained respectively, At that current velocity output by the neural network, At that next velocity of the output of the neural network, determining the current velocity as the critical erosion velocity of the target well, obtaining Neural network by training the data of injection-production working condition and the information of whether the string erosion occurs under various workingconditions of the target well. Neural network is used to input the data of injection-production working condition under one working condition and output the information of whether the string erosion occurs under this working condition. The neural network is used to input the data of injection-production working condition under one working condition.
Description
technical field [0001] The invention relates to the technical field of injection-production engineering, in particular to a method and device for determining the critical erosion flow velocity of an injection-production pipe string. Background technique [0002] At present, the size design of gas wells and injection-production well strings should first meet the requirements of gas well proration and injection-production well gas production volume, and at the same time, factors such as pressure loss along the process, critical liquid-carrying flow rate and critical erosion flow rate should be considered comprehensively; among them, Critical erosion flow rate is an important factor limiting the size of production string and injection-production string. The critical erosion flow rate is equal to the product of the critical erosion rate and the cross-sectional area of the string. The size of the pipe string should not be smaller than the size corresponding to the critical ero...
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IPC IPC(8): G06F17/50G06N3/08
CPCG06N3/08G06F30/20
Inventor 王云
Owner PETROCHINA CO LTD