CN-121993159-A - Anti-blocking method and device for logging

CN121993159ACN 121993159 ACN121993159 ACN 121993159ACN-121993159-A

Abstract

The application provides a well logging anti-blocking method and device, the method comprises the steps of obtaining structural data of a well to be analyzed and dynamic data of a well logging tool combination, solving a well logging tool combination dynamic model by utilizing the structural data and the dynamic data, calculating to obtain motion data of the well logging tool combination, calculating to obtain well wall friction data under different speeds according to the motion data of the well logging tool combination, calculating to obtain the lowest lowering speed and the lowest lifting speed of the well logging tool combination based on the well wall friction data under different speeds and the well logging tool combination dynamic model, and driving a cable through a well head winch, and performing lowering operation and/or lifting operation under the condition of not lower than the lowest lowering speed and the lowest lifting speed so as to enable the well head winch to safely log. The problem that the blockage problem is more frequent due to the complex well environment in the well logging operation process is solved, and an important foundation is laid for safe well logging.

Inventors

ZHAO ZHIQIANG
YANG BIN
HOU WENHUI
DU HUANFU
DU SHUYAN
GONG CHENGSHI

Assignees

中国石油化工股份有限公司
中石化石油工程技术服务股份有限公司
中石化经纬有限公司
中石化经纬有限公司地质测控技术研究院

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. A method for logging anti-blocking, comprising: acquiring structural data of a well to be analyzed and dynamic data of a logging tool combination; Solving a logging tool combination dynamics model by utilizing the structural data and the dynamics data, and calculating to obtain movement data of the logging tool combination; according to the motion data of the logging tool combination, calculating to obtain well wall friction data under different speed measurements; calculating to obtain the lowest lowering speed and the lowest lifting speed of the logging tool combination based on the well wall friction data under different speed measurements and the logging tool combination dynamics model; and the cable is driven by the wellhead winch, and the lowering operation and/or the lifting operation are/is carried out under the condition of not lower than the lowest lowering speed and the lowest lifting speed, so that the wellhead winch can safely log.
2. The method of claim 1, wherein the cable is driven by the wellhead winch and the lowering operation and/or the lifting operation are/is performed at a speed not lower than the lowest lowering speed and the lowest lifting speed, so that the wellhead winch can safely log the well, comprising: The cable is driven by the wellhead winch, and the lowering operation and/or the lifting operation are/is carried out under the condition that the lowering speed is not lower than the lowest lowering speed and the lowest lifting speed; when the logging tool combination contacts an irregular well wall, changing the logging instrument string momentum of the logging tool combination by adjusting the speed measurement; the logging instrument string momentum of the logging instrument assembly is changed by increasing the speed measurement based on the Stribeck curve when the logging instrument assembly contacts a boundary friction zone or a hybrid friction zone.
3. The method of claim 1, wherein calculating a minimum lowering speed and a minimum raising speed of the logging tool assembly based on the wall friction data at the different speeds and the logging tool assembly dynamics model comprises: Based on the well wall friction data under different speed measurements and the logging tool combination dynamics model, combining a preset lowering speed and a preset lifting speed, and calculating to obtain wellhead tension of the logging tool combination when the logging tool combination passes through the wellhead of the well to be analyzed; And adjusting the wellhead tension according to a preset safety tension range so as to calculate the speed distribution of different wellhead tensions in the preset safety tension range and obtain the lowest lowering speed and the lowest lifting speed of the logging tool combination.
4. The method of claim 1, wherein using the structural data and the kinetic data to solve a logging tool combination kinetic model, calculating motion data of the logging tool combination, comprises: performing a dynamic analysis on the logging tool combination based on the dynamics data to construct the logging tool combination dynamics model; And solving the dynamic model of the logging tool combination by using the structural data and the dynamic data, and calculating to obtain the motion data of the logging tool combination.
5. The method of claim 4, wherein the motion data comprises node displacement, node axial force, unit friction, velocity, and acceleration, and wherein using the structural data and the kinetic data, solving the logging tool combination kinetic model, and calculating the motion data of the logging tool combination comprises: setting a speed boundary and initial conditions corresponding to the logging tool combination dynamics model; adopting a second-order precision finite difference method, solving a dynamic model of the logging tool combination based on the speed boundary and the initial condition by utilizing the structural data and the dynamic data, and calculating to obtain the node displacement of the logging tool combination; And calculating to obtain the node axial force, the unit friction, the speed and the acceleration of the logging tool combination according to the speed boundary, the initial condition, the node displacement and the logging tool combination dynamics model.
6. A logging anti-snag device, comprising: an acquisition module for acquiring structural data of the well to be analyzed and dynamic data of the logging tool combination The first calculation module is used for solving a logging tool combination dynamics model by utilizing the structural data and the dynamics data, and calculating to obtain movement data of the logging tool combination; the second calculation module is used for calculating and obtaining the well wall friction data under different speed measurements according to the motion data of the logging tool combination; The third calculation module is used for calculating the lowest lowering speed and the lowest lifting speed of the logging tool combination based on the well wall friction data under different speed measurements and the logging tool combination dynamics model; And the control module is used for driving the cable through the wellhead winch, and carrying out the lowering operation and/or the lifting operation under the condition of not lower than the lowest lowering speed and the lowest lifting speed so as to ensure that the wellhead winch is used for safe logging.
7. The well logging anti-blocking device of claim 6, wherein the control module comprises: The control sub-module is used for driving the cable through the wellhead winch and carrying out the lowering operation and/or the lifting operation under the condition of not lower than the lowest lowering speed and the lowest lifting speed; the first adjusting submodule is used for changing the string momentum of logging instruments of the logging tool combination by adjusting the speed measurement when the logging tool combination contacts an irregular well wall; And the second adjusting sub-module is used for changing the string momentum of the logging instrument combination by improving the speed measurement based on the Stribeck curve when the logging instrument combination contacts a boundary friction area or a mixed friction area.
8. An electronic device comprising a processor and a memory storing computer readable instructions that, when executed by the processor, perform the method of any of claims 1-5.
9. A storage medium having stored thereon a computer program which, when executed by a processor, performs the method of any of claims 1-5.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any of claims 1-5.

Description

Anti-blocking method and device for logging Technical Field The invention relates to the technical field of logging operation, in particular to an anti-blocking method and device for logging. Background Logging is one of the important means for obtaining geological data in oil and gas exploration engineering. In the practice of improving the oil and gas exploration benefits and realizing multi-disciplinary intersection, the wide application of logging data will certainly promote the rapid development of the related research field. In the logging operation process, the instrument string is blocked in the falling process and blocked in the lifting process, and the instrument string is a frequently-occurring working condition, mainly because an actual borehole is not smooth, and has irregular borehole walls such as steps, shrinkage, collapse, sand bridges, doglegs and the like, especially under the large environment of improving the drilling speed and efficiency, if the borehole and mud are not well processed, complex borehole environments such as unstable borehole wall, poor borehole track and the like are caused, the situation of the logging is increased when the logging is blocked and blocked is caused, and the drilling fluid is often required to be repeatedly processed, so that the cost is increased and the time is wasted, and even the logging instrument is blocked or falls into the borehole. Therefore, the well logging anti-blocking method based on the well logging tool combination dynamics model is studied, and has important significance for avoiding the blocking problem of the cable winch, ensuring the safe well logging of the cable winch and the sustainable development of well logging anti-blocking. Disclosure of Invention The invention provides an anti-blocking method and device for logging, which are used for solving the problem that blocking is more frequent due to a complex well environment in the logging operation process, and laying an important foundation for safe logging. In a first aspect, the present invention provides a method for logging anti-sticking, including: acquiring structural data of a well to be analyzed and dynamic data of a logging tool combination; Solving a logging tool combination dynamics model by utilizing the structural data and the dynamics data, and calculating to obtain movement data of the logging tool combination; according to the motion data of the logging tool combination, calculating to obtain well wall friction data under different speed measurements; calculating to obtain the lowest lowering speed and the lowest lifting speed of the logging tool combination based on the well wall friction data under different speed measurements and the logging tool combination dynamics model; and the cable is driven by the wellhead winch, and the lowering operation and/or the lifting operation are/is carried out under the condition of not lower than the lowest lowering speed and the lowest lifting speed, so that the wellhead winch can safely log. Optionally, the cable is driven by the wellhead winch, and the lowering operation and/or the lifting operation are/is performed under the condition of not lower than the lowest lowering speed and the lowest lifting speed, so that the wellhead winch can safely log, and the method comprises the following steps: The cable is driven by the wellhead winch, and the lowering operation and/or the lifting operation are/is carried out under the condition that the lowering speed is not lower than the lowest lowering speed and the lowest lifting speed; when the logging tool combination contacts an irregular well wall, changing the logging instrument string momentum of the logging tool combination by adjusting the speed measurement; the logging instrument string momentum of the logging instrument assembly is changed by increasing the speed measurement based on the Stribeck curve when the logging instrument assembly contacts a boundary friction zone or a hybrid friction zone. Optionally, calculating, based on the wall friction data under the different speed measurements and the logging tool combination dynamics model, a lowest lowering speed and a lowest lifting speed of the logging tool combination, including: Based on the well wall friction data under different speed measurements and the logging tool combination dynamics model, combining a preset lowering speed and a preset lifting speed, and calculating to obtain wellhead tension of the logging tool combination when the logging tool combination passes through the wellhead of the well to be analyzed; And adjusting the wellhead tension according to a preset safety tension range so as to calculate the speed distribution of different wellhead tensions in the preset safety tension range and obtain the lowest lowering speed and the lowest lifting speed of the logging tool combination. Optionally, using the structural data and the dynamics data, solving a logging tool combination dynamics model, and calcul