Method, device and system for evaluating risk of insufficient borehole cleaning

A wellbore and cleaning technology, applied in wellbore/well components, earth-moving drilling, measurement, etc., can solve the problems of inconvenient wellbore cleaning, insufficient, and difficulty in obtaining the concentration of suspended cuttings, and achieve the goal of improving drilling safety. Effect

Pending Publication Date: 2022-03-18
YANGTZE UNIVERSITY
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Problems solved by technology

[0004] In view of this, it is necessary to provide a method, device and system for assessing the risk of insufficient wellbore cleaning to solve the problem in the prior art that it is d

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  • Method, device and system for evaluating risk of insufficient borehole cleaning
  • Method, device and system for evaluating risk of insufficient borehole cleaning
  • Method, device and system for evaluating risk of insufficient borehole cleaning

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[0045] The preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, in which the appended claims is intended to illustrate the principles of the invention, are not intended to limit the scope of the invention.

[0046] Please refer to figure 1 The present invention provides a method for assessing the unsuitable risk of wellbore cleaning, including:

[0047] S1, obtain the measured pressure of several measurement points on the wellbore, and obtain the measurement pressure drop of the two adjacent measurement points on the wellbore according to the measured pressure of each measurement point;

[0048] S2, theoretically degradation of two adjacent measurement points on the wellbore, specifically, theoretical pressure drop includes a pressure drop caused by a friction effect and a pressure drop caused by hydrostatic pressure;

[0049] S3, according to the theoretical pressure drop and the actual pressure drop of...

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Abstract

The invention discloses a method, device and system for evaluating the risk of insufficient borehole cleaning, and the method comprises the steps: obtaining the actual measurement pressure of a plurality of measurement points on a wellbore, and obtaining the actual measurement pressure drop of two adjacent measurement points on the wellbore according to the actual measurement pressure of each measurement point; obtaining the theoretical pressure drop of two adjacent measuring points on the shaft; and according to the theoretical pressure drop and the actually measured pressure drop of the two adjacent measuring points on the wellbore, the risk of insufficient borehole cleaning is judged. The method has the advantages that the theoretical pressure drop between every two adjacent measuring points on the shaft comprises the pressure drop caused by the friction effect and the pressure drop caused by hydrostatic pressure, but the pressure drop in a well hole can be obviously changed by suspended rock debris in actual drilling fluid. And if a large amount of rock debris exists, the calculated theoretical pressure drop and the actually measured pressure drop have obvious difference, so that the relationship between the theoretical pressure drop and the actually measured pressure drop can be compared to evaluate the underground borehole cleaning condition and judge the risk of insufficient borehole cleaning.

Description

technical field [0001] The invention relates to the technical field of drilling engineering, in particular to a method, device and system for assessing the risk of insufficient wellbore cleaning. Background technique [0002] Insufficient wellbore cleaning is one of the main problems in drilling safety prevention and accident warning (please refer to the Chinese invention patent with application number CN201910119287.2). The accumulation of cuttings bed in any well section will easily cause problems such as excessive friction torque of drilling tools, pressure loss of drill bit, low ROP, and even serious downhole accidents such as pipe sticking and wellbore filling. For real-time downhole condition monitoring, the main challenge is the uncertainty of the input parameters of the drilling model. The uncertainty between these parameters will increase with the increase of the well depth, and even the accuracy of the drilling calculation model may be significantly reduced. . ...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/06
CPCE21B47/00E21B47/06E21B2200/20E21B21/08E21B47/047
Inventor 张菲菲彭涛王茜王怡迪王学迎余义兵魏凯
Owner YANGTZE UNIVERSITY
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