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Method and system for calculating pressure drop correction coefficient in drilling tool based on single measured data

A technology of correction coefficient and measured data, applied in the automatic control system of drilling, measurement, drilling equipment, etc., can solve the problem that the accuracy of calculation results cannot be guaranteed, has no versatility, and cannot meet the real-time calculation of bottom hole pressure.

Pending Publication Date: 2021-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure measurement technology using the pressure measurement while drilling tool has the following problems: first, the pressure measurement while drilling tool uses mud pulses to transmit data, the transmission efficiency is low, and the interval between data points is long, which cannot meet the needs of real-time calculation of bottomhole pressure; The cost of pressure measurement while drilling is relatively high, which is not convenient for large-scale promotion and application
This technical scheme adopts a single addition and subtraction operation, the factors considered are too monotonous, the accuracy of the calculation results cannot be guaranteed, and it is only suitable for simple corrections under a certain displacement, and cannot be widely used in the drilling process of exploration and development In each link, there is no universality

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  • Method and system for calculating pressure drop correction coefficient in drilling tool based on single measured data
  • Method and system for calculating pressure drop correction coefficient in drilling tool based on single measured data
  • Method and system for calculating pressure drop correction coefficient in drilling tool based on single measured data

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Embodiment 1

[0051] figure 1 It shows the flow chart of the method for calculating the pressure drop correction coefficient in the drilling tool based on the single measured data in the first embodiment of the present invention, as shown in figure 1 As shown, the method includes the following steps:

[0052] Step S110, segmenting the drill tool according to the acquired structural parameters to obtain multiple drill tool segments.

[0053] Specifically, in the above step S110, the structural parameters of the drilling tool are obtained, including: obtaining the drill tool assembly sequence, drill collar steel grade and model, drill pipe steel grade and model, drill pipe joint model, adapter model and drill tool body and the inner diameter of the joint. In this step, the specific method for obtaining the structural parameters of the drilling tool is not limited.

[0054] Further, the process of segmenting the drilling tool according to the structural parameters of the drilling tool inclu...

Embodiment 2

[0145] Based on the above embodiment of the method for calculating the correction coefficient of pressure drop inside the drill tool, the embodiment of the present invention also provides a system for calculating the correction coefficient of pressure drop inside the drill tool based on a single actual measurement data, image 3 A schematic structural diagram of a system for calculating the correction coefficient of pressure drop in a drilling tool based on a single actual measurement data in Embodiment 2 of the present invention is shown, and the system executes the method steps in the foregoing embodiments.

[0146] Such as image 3 As shown, the system 30 for calculating the pressure drop correction coefficient in the drilling tool according to the embodiment of the present invention mainly includes:

[0147] The drilling tool segmentation module 31 , the integrated Reynolds number determination module 33 , the coefficient determination model building module 35 and the corr...

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Abstract

The invention provides a method and system for calculating a pressure drop correction coefficient in a drilling tool based on single measured data. The method comprises the steps of segmenting the drilling tool based on drilling tool structure parameters, and calculating and determining the comprehensive flow Reynolds number of the drilling tool according to the pressure drop contribution parameters and the flow Reynolds number of each drilling tool segment; and then determining an in-pipe pressure drop result of the drilling tool by utilizing a corresponding correction coefficient determination model according to the comprehensive flowing Reynolds number, wherein the correction coefficient determination model is constructed by training according to the sample pressure drop correction coefficient and the sample comprehensive flow Reynolds number. According to the scheme, a high-precision correction coefficient result can be obtained only by performing single pressure drop actual measurement and combining specific calculation operation, the test cost in the correction coefficient calculation process is effectively reduced, the defects of single calculation factor and inaccurate result in the prior art are overcome, and meanwhile, the scheme has universality and stability, and reliable data support can be provided for underground hydraulic parameter calculation in the oil and gasdrilling process.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics in drilling engineering, in particular to a method and system for calculating a correction coefficient of pressure drop in a drilling tool based on a single actual measurement data. Background technique [0002] As my country's exploration and development of oil and gas resources gradually enters deep formations, the number of slim borehole deep wells and ultra-deep wells is increasing, the difficulty of exploration is gradually increasing, and the problem of narrow density windows is widespread. Accurate drilling hydraulic parameter calculation results are the guarantee for exploration and development projects It is an indispensable factor for safe and efficient drilling, so the calculation and optimization of drilling hydraulic parameters is particularly important. Among them, one of the cores of the calculation of drilling hydraulic parameters is the accurate calculation of the pressure ...

Claims

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Application Information

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IPC IPC(8): E21B44/00E21B47/06E21B41/00
CPCE21B44/00E21B47/06Y02T90/00
Inventor 周号博王果刘劲歌范红康陈小锋
Owner CHINA PETROLEUM & CHEM CORP