CN-121993169-A - Method and system for determining real-time depth of pressurized operation pipe column

CN121993169ACN 121993169 ACN121993169 ACN 121993169ACN-121993169-A

Abstract

The invention provides a method and a system for determining real-time depth of a string of a pressurized operation, wherein the method comprises the following steps of judging the type of the string, wherein the string comprises a light string, a neutral point string and/or a heavy string, and determining the real-time depth of the string in the load transfer process and the tripping process respectively based on the type of the string. The system is used for realizing the method for determining the real-time depth of the pressurized operation pipe column, and comprises a pressurized operation unit, a sensing unit and a data processing unit. The method and the system for determining the real-time depth of the pressurized operation pipe column realize the real-time automatic calculation of the depth of the pressurized operation pipe column, reduce the risk of manual measurement accumulation calculation, the method provides accurate data support for the real-time depth of the pipe column for the operation under pressure, and effectively reduces the probability of complex faults such as blocking and the like when the key well section is started and rotated.

Inventors

HE ENPENG
TAO JUNYI
QIAN HAODONG
PENG TAOJUN
ZHANG ZHIFA
ZHANG YUPING
TANG LIN
YUAN HAIPING
HUANG WEI
FENG TIANYU

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241106

Claims (10)

1. The method for determining the real-time depth of the pressurized operation pipe column is characterized by comprising the following steps of: judging the type of the pipe column, wherein the pipe column comprises a light pipe column, a neutral point pipe column and/or a heavy pipe column; And determining the real-time depth of the pipe column in the load transferring process and the tripping process respectively based on the type of the pipe column.
2. The method of determining the real-time run-in depth of a string of pressurized work string of claim 1, wherein the step of determining the real-time run-in depth of the string during load transfer comprises: confirming whether the fixed bearing slips and the fixed anti-jacking slips are switched from any closed state to a fully opened state, if so, recording a lifting height value G2 and a pipe column real-time lower depth value L2 at the moment; and traversing the real-time data in a reverse order until the traversing is finished when the data point is closed for the first time by the traveling anti-jack slip or the traveling bearing slip, and recording the lifting height value G1 at the moment to obtain the lifting height change value G and the real-time lower depth value L of the pipe column, wherein G=G2-G1 and L=L2-G.
3. The method of claim 2, wherein the step is a light string or a neutral string determination step if the traversing is completed at the point of the first closed traveling anti-jack slip, and the step is a heavy string determination step if the traversing is completed at the point of the first closed traveling anti-jack slip.
4. The method of determining the real-time run-in depth of a string of pressurized work string of claim 1, wherein the step of determining the real-time run-in depth of the string during tripping comprises: Confirming whether the fixed bearing slip and the fixed anti-jacking slip are in a fully-opened state or not and whether any one traveling slip is in a closed state, if so, recording a lifting height value G3 and a pipe column real-time lower depth value L1 at the moment; The lift height value G4 of the next data point is recorded to obtain a lift height change value G ' and a column real-time depth value L ', wherein G ' =G4-G3 and L ' =L1-G '.
5. The method for determining the real-time depth of the string for the pressurized operation according to claim 1, wherein the sum of the self weight and the friction force of the light string is smaller than the propping force of the string in the well bore in the process of the string for the pressurized operation, the sum of the self weight and the friction force of the neutral point string is equal to or tends to be equal to the propping force of the string in the well bore in the process of the string for the pressurized operation, and the sum of the self weight and the friction force of the heavy string is larger than the propping force of the string in the well bore in the process of the string for the pressurized operation.
6. The method for determining the real-time depth of the pressurized operation pipe column according to claim 5, wherein the judging method of the light pipe column comprises the steps of turning off any one of the fixed bearing slips and the fixed anti-jacking slips to be in a fully-opened state, traversing 15 data points of real-time data in a reverse order if the fixed bearing slips and the fixed anti-jacking slips are in the fully-opened state, and turning on the 3 fixed bearing slips if the fixed anti-jacking slips are in the closed state and the fixed bearing slips are in the opened state, so that the pipe column is the light pipe column.
7. The method for determining the real-time depth of the pressurized operation pipe column according to claim 5, wherein the method for judging the neutral point pipe column is characterized in that whether the fixed bearing slips and the fixed anti-jacking slips are all in a fully-opened state or not is changed from any one of closing states, if so, 15 data points of real-time data are traversed in a reverse order, and if 3 fixed anti-jacking slips are closed and 3 fixed bearing slips are closed, the pipe column state at the moment is the neutral point pipe column.
8. The method for determining the real-time depth of the pressurized operation pipe column according to claim 5, wherein the judging method of the heavy pipe column comprises the steps of turning off any one of the fixed bearing slips and the fixed anti-jacking slips to be in a fully-opened state, traversing 15 data points of real-time data in a reverse order if the fixed bearing slips and the fixed anti-jacking slips are turned on, and turning on the 3 fixed anti-jacking slips if the fixed bearing slips and the fixed anti-jacking slips are in the closed state, wherein the pipe column is the heavy pipe column.
9. The method for determining the real-time depth of the string for the operation under pressure according to claim 4, wherein in the process of setting the string for the operation under pressure, if the string is a light string, the real-time depth calculation is finished when the fixed anti-jacking slip is switched on to off, if the string is a neutral point string, the real-time depth calculation is finished when the fixed anti-jacking slip and the fixed weighing slip are all switched on to off, and if the string is a heavy string, the real-time depth calculation is finished when the fixed bearing slip is switched on to off.
10. A system for determining the real-time depth of a pressurized working string is characterized in that the system is used for realizing the method for determining the real-time depth of the pressurized working string according to any one of claims 1-9, and comprises a pressurized working unit, a sensing unit and a data processing unit, The belt-pressure operation unit is configured to perform belt-pressure operation; The sensing unit is configured to collect data in the process of the operation under pressure; The data processing unit is configured to process the data acquired by the sensing unit.

Description

Method and system for determining real-time depth of pressurized operation pipe column Technical Field The invention relates to the technical field of petroleum and natural gas drilling and production engineering, in particular to a method and a system for determining the real-time depth of a string of pressurized operation. Background As the development of oil and gas fields proceeds further, oil field oil-gas-water wells are serviced more and more frequently. Conventional operations generally use high-density well-killing hydraulic wells or open-air means to reduce the well pressure and then perform the operations. The high-density well killing hydraulic well is high in cost and long in time, and can block an underground oil-water channel to influence the yield of oil extraction gas and the water injection effect. If the open flow depressurization is adopted, not only can the stratum energy be greatly reduced and immeasurable loss is brought to subsequent production, but also a great amount of environmental pollution is caused. However, the pressurized operation technique has unique advantages in oil, gas and water well service. In recent years, development strength of unconventional clean energy sources such as shale gas is further enhanced, and in the later stage of development and production, formation water enters a shaft in a large amount, so that normal production and gas production are greatly influenced, and in order to improve liquid carrying capacity and single well recovery ratio, an oil pipe with a small drift diameter needs to be put into the oil pipe, and in order to avoid polluting a production layer, a pressure operation technology is widely applied to unconventional well oil pipe lifting operation. In the construction process of the operation under pressure, the real-time depth of the pipe column is a very critical parameter, and if a main operator cannot master the real-time depth of the pipe column in real time, the main operator is easy to cause the tripping and blocking during tripping and rotating operation of a critical well section, and the occurrence of the blocking of the drilling is more serious, so that the economic benefit is seriously influenced. In field construction, the length of a single oil pipe is generally measured manually, the depth of a pipe column is calculated manually in real time in an accumulation mode, and automatic real-time calculation cannot be performed through sensor data and the like. The manual calculation has the risks of large measurement errors and inaccurate calculation, which can lead to that the calculated pipe column depth is not in accordance with the actual value in real time, and the risks of complex engineering or engineering accidents are greatly increased. Therefore, the method for determining the real-time depth of the string of the pressurized operation is provided, the real-time depth of the string is automatically calculated, and the method has important significance in providing data support for the safe construction of the pressurized operation. The application patent of China with the application number of CN201510452167.6 and the name of wireless real-time depth positioning device and method for a coiled tubing operation pipe column discloses a wireless real-time depth positioning device and method for the coiled tubing operation pipe column, wherein the device comprises an underground sounding pipe assembly and a ground data processing device, and the underground sounding pipe assembly comprises a barrel, an underground turbine generator, a CCL-GR sounding pipe and a pulse generator; the underground turbine generator supplies power for the CCL-GR probe tube and the pulse generator, the CCL-GR probe tube detects and collects the position of a casing coupling or/and formation gamma data and converts the position of the casing coupling or/and the formation gamma data into an electric signal, then the start and stop of the pulse generator are controlled to convert the electric signal into a pressure pulse signal attached to circulating liquid and transmit the pressure pulse signal to the ground data processing device, the ground data processing device obtains the pressure pulse signal by means of the pressure sensor, decodes the pressure pulse signal, and compares the pressure pulse signal with standard coupling depth or/and gamma curve data to obtain the depth data of the pipe column. The method for measuring the depth of the pipe column by using the device can accurately acquire the depth of the continuous oil pipe operation pipe column in real time. However, the present application is different from the method thereof. Disclosure of Invention The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, one of the purposes of the invention is to solve the problems of difficult acquisition of the real-time deep data of the pipe column, high constru