Working condition monitoring and control model building method and application method and device thereof

A technology of model building and working conditions, applied in the field of managed pressure drilling, can solve labor and other problems, achieve the effects of reducing costs, being widely applicable, and improving efficiency and accuracy

Pending Publication Date: 2022-05-20
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the judgment and processing of abnormal working conditions still need to be completed manually

Method used

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  • Working condition monitoring and control model building method and application method and device thereof
  • Working condition monitoring and control model building method and application method and device thereof
  • Working condition monitoring and control model building method and application method and device thereof

Examples

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Effect test

Embodiment 1

[0135] Embodiment 1 of the present invention provides a method for establishing a working condition monitoring model, the process of which is as follows figure 1 shown, including the following steps:

[0136] Step S101: Generate a sample set from the multiple sets of working-condition drilling data obtained, and extract multiple sets of working-condition drilling data from the sample set as a training set.

[0137] In some optional embodiments, multiple sets of working condition drilling data obtained at different times or different time periods are used to generate a sample set, and each sample data in the sample set contains information related to the time or time period Corresponding vertical pressure, back pressure, outlet flow, flow difference and working condition labels. Among them, different working conditions refer to working conditions such as normal drilling, drilling shutdown, overflow and leakage. When the formation pressure is greater than the bottom hole press...

Embodiment 2

[0214] Embodiment 2 of the present invention provides a working condition monitoring method, the process of which is as follows Figure 10 shown, including the following steps:

[0215] Step S201: Obtain the standing pressure, back pressure, outlet flow and flow difference corresponding to the moment or time period of the working condition to be tested, and generate data of the working condition to be tested. The vertical pressure, back pressure, outlet flow and flow difference in the working condition data to be measured can be obtained by referring to the method of obtaining the drilling data in the working condition, and the specific method has been introduced in the first embodiment. Among them, the flow rate of the bottom hole drill bit is calculated through the perception algorithm, and then the flow rate difference is obtained, which is convenient for obtaining flow rate difference data in wells that do not have corresponding measurement conditions, reduces the cost of ...

Embodiment 3

[0260] Embodiment 3 of the present invention provides a method for establishing a working condition control model, the process of which is as follows Figure 11 shown, including the following steps:

[0261] Step S301: Accumulate multiple groups of state-action data related to drilling conditions in the playback buffer of the deep Q network DQN model.

[0262] Abnormal working conditions refer to working conditions other than normal working conditions, such as overflow, leakage and other working conditions. When the formation pressure is greater than the bottom hole pressure, overflow will occur. Overflow is the process that the gas and liquid in the formation invade the annulus of the wellbore. Overflow includes gas invasion or liquid invasion; gas invasion is gas intrusion, which is a kind of overflow, and the overflow fluid can be gas or liquid. Losses occur when formation pressure is less than bottomhole pressure. The bottom hole pressure can be controlled by changing t...

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Abstract

The invention discloses a working condition monitoring and control model establishing method and an application method and device thereof. Comprising the steps of training a deep belief network DBN model by using the training set until a preset termination condition is reached, and obtaining a working condition monitoring model. Accumulating a plurality of groups of state-action data related to drilling working conditions in a playback buffer area of the deep Q network DQN model; the method comprises the following steps: obtaining a DQN model, reusing a Q value through transfer learning, storing historical data and empirical data related to a drilling working condition into a playback buffer area, training the DQN model until a reward accumulated value curve converges, and obtaining a control model comprising a working condition control strategy. The working condition monitoring can be more accurate and quicker, the working condition judgment efficiency and quality can be improved, the empirical data can be effectively utilized by the control model, the working condition control efficiency and accuracy can be improved, the process of finding a better action by the working condition control strategy is accelerated, and the control response to the working condition can be timely made.

Description

technical field [0001] The invention relates to the technical field of managed pressure drilling, in particular to a working condition monitoring and control model establishment method and its application method and device. Background technique [0002] At the actual drilling site, engineers can use certain technical means to avoid abnormal conditions before they occur. So far, the judgment and processing of abnormal working conditions still need to be completed manually. The manual judgment method for abnormal drilling conditions is mainly based on whether the change of specific parameters exceeds the threshold, and finally a comprehensive judgment is made based on field experience and knowledge. When overflow or leakage occurs, the control of bottom hole pressure can only be switched from automatic control state to manual control state, and then the wellhead back pressure is frequently adjusted according to the experience of engineers to suppress gas invasion or leakage. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06F30/27G06N3/04G06N3/08G06F17/11G06F113/08
CPCG06F30/25G06F30/27G06N3/04G06N3/088G06N3/084G06F17/11G06F2113/08
Inventor 刘伟徐宝昌付加胜赵庆翟小强李牧孟卓然张瑞凇
Owner BC P INC CHINA NAT PETROLEUM CORP
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