CN-121997514-A - Data acquisition method for improving accuracy of underground anti-collision tool analysis model

CN121997514ACN 121997514 ACN121997514 ACN 121997514ACN-121997514-A

Abstract

The invention discloses a data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool, which belongs to the technical field of design, research and development and construction of oil and gas well drilling and completion tools, and comprises the steps of selecting a site with stable and lower surrounding natural magnetic field to provide an environment suitable for magnetic field data acquisition; simulating real forms and drilling parameters of underground space of a well group of a long-celebration oil field, taking residual magnetic flux of adjacent well casings into consideration, carrying out magnetic detection data collection of different space positions, filtering invalid data in the collected data, which are influenced by temperature and wind power, establishing an underground magnetic detection type anti-collision tool analysis database, and putting the filtered standard templates into the database to enrich template analysis scenes. According to the invention, a three-dimensional database is established according to the underground space track distribution of the large well group, so that the analysis precision of the model is enhanced, and the detection accuracy of a tool system is improved.

Inventors

GAO YONGWEI
HE WANG
CHEN CAIZHENG
WEI HAIFANG
CAO JIANWEI
ZHOU WENBING
WANG JUNCHUANG
DU SONGTAO
LIANG HONGWEI
JIANG SHENGHUI

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: 20241105

Claims (10)

1. The data acquisition method for improving the accuracy of the analysis model of the underground anti-collision tool is characterized by comprising the following steps of: Selecting a place with stable and lower surrounding natural magnetic field to provide an environment suitable for magnetic field data acquisition; Simulating real forms and drilling parameters of underground space of a long-celebration oilfield well group, and carrying out magnetic detection data collection of different space positions by considering residual magnetic fluxes of adjacent well casings; step three, filtering invalid data which is influenced by temperature and wind power in the acquired data; And step four, establishing an underground magnetic detection type anti-collision tool analysis database, and placing the filtered standard templates into the database to enrich template analysis scenes.
2. The data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 1, wherein the performing of the magnetic detection data collection of different spatial positions comprises: Carrying out a test analysis template test of a downhole magnetic detection type anti-collision tool by using a non-magnetic carrier; sequentially connecting a plurality of sleeves into a whole section through threads, placing the connected sleeves on a nonmagnetic carrier by using a crane, conveying the sleeves to a proper position of a test site, and keeping the sleeves motionless; the magnetic detection type anti-collision tool is fixed on another non-magnetic carrier, so that the non-magnetic carrier moves along the length direction of the sleeve in a set path, and therefore magnetic field data of a plurality of groups of spaces are collected, and a plurality of standard templates are formed.
3. The method for acquiring data for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 2, wherein the method for acquiring the data is characterized in that the magnetic detection type anti-collision tool is fixed on another non-magnetic carrier and moves along the length direction of the sleeve in a set path, and comprises the steps of determining the initial distance between the sleeve and the magnetic detection type anti-collision tool, and enabling the non-magnetic carrier to carry the magnetic detection type anti-collision tool along the length direction of the sleeve so as to form a curve detection track according to the movement trend of approaching and separating from each other.
4. A data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool as claimed in claim 3, wherein the selected nonmagnetic carrier is an aluminum trolley.
5. The data acquisition method for improving the accuracy of an analysis model of a downhole anti-collision tool according to claim 2, wherein the moving device of the magnetic detection type anti-collision tool keeps constant speed in the moving process.
6. The data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 5, wherein the moving speed of a moving device of the magnetic detection type anti-collision tool in the acquisition process is 1m/3-5s.
7. The data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 3, wherein the starting end and the ending end of a curve detection track of the magnetic detection anti-collision tool exceed the left end and the right end of the sleeve.
8. The method for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 3, wherein after the acquisition of magnetic field data at a certain initial distance is completed, the initial distance between the sleeve and the magnetic detection type anti-collision tool is changed for a plurality of times, and the magnetic field data are acquired again according to the same curve detection track, so that a plurality of standard templates at a plurality of initial distances are formed.
9. The method for data acquisition for improving the accuracy of an analysis model of an underground anti-collision tool according to claim 3, wherein after the acquisition of magnetic field data at a series of initial distances is completed, the initial height of the magnetic detection type anti-collision tool is changed, and the magnetic field data are acquired again at a plurality of initial distances by using the same curve detection track, so that a plurality of standard templates with different initial distances at different initial heights are formed.
10. The method for data acquisition to improve accuracy of an analysis model of a downhole anti-collision tool of claim 8, wherein the series of starting distances between the detected casing and the magnetic probe anti-collision tool are 3m, 5m, 7m, 9m, respectively.

Description

Data acquisition method for improving accuracy of underground anti-collision tool analysis model Technical Field The invention relates to the field of design, research and development and construction of oil and gas well drilling and completion tools, in particular to a data acquisition method for improving the accuracy of an analysis model of an underground anti-collision tool. Background In recent years, the number of shale oil and gas adopted well group development modes is increasing year by year, limited by the enhancement of environmental protection policies. In recent years, the development of the Changqing shale oil adopts multi-layer, large well cluster and three-dimensional development modes, wherein a Hua H100 platform single platform deploys 31 horizontal wells, the well head distance is 8m, the well head row distance is 31m, and the collision prevention pressure of the diameter section and the inclined well section is huge. The well of the oil production ten factories is closed at the white 409 well region, 73 well straight fixed wells and highly inclined wells are deployed at 18-78 well sites, the well mouth distance is 4-8m, and the anti-collision difficulty of the inclined well section is high. The construction of the old area adjusting encryption well is in the original well site, the well site area is limited, and the collision prevention between the straight well sections is difficult in the new well drilling process. In 2021, the group company is used for in-situ conversion of Changqing shale oil into small well spacing horizontal well cluster drilling and completion technical test projects, and the requirement on anti-collision tools is urgent. Meanwhile, for the drilling data in the 90 th and the past of the last century, the data accuracy is poor or even lost due to the influence of the long-term and preservation mode, and the anti-collision working pressure is unprecedented in the secondary operation. But the current domestic mature magnetic positioning tool mainly meets SAGD thick oil exploitation technology, such as RMS-I developed by western drilling. The basic principle of the similar products is that the similar products are all active magnetic positioning tools, when the tools are used, magnetic sources need to be put into a target well, the production of a temporary well is affected, and the use of the tools is limited. Therefore, development of a passive type accurate magnetic detection anti-collision tool is needed to be developed, so that requirements of different production requirements on the passive type accurate magnetic detection anti-collision tool are met, and the domestic blank of the technology is filled. The following related technical measures are collected by carrying out wide technical consultation aiming at the problems in the development and experimental process of the underground anti-collision tool: Firstly, aiming at the three-dimensional development well patterns formed along with the gradual formation of Fuling shale gas fields, the anti-collision analysis of a main body area is more important in the well drilling construction in the complex space between an upper layer and a lower layer and between wells. Taking a focal-plane X6HF well as an example, in order to prevent the occurrence of sleeve collision accidents, conventional scanning and three-dimensional scanning verification are carried out on the well design track, and the anti-collision requirement of the shortest distance of more than 40m is met by adjusting the track to reach the depth of more than 2000-3000 m. The existing adjustment deployment well is positioned in the main body area of the coke dam, and the anti-collision scanning analysis flow can be used in the Jiangdong and flat bridge areas, can also be popularized in the market, and can be repeatedly popularized and used. Secondly, an adjacent well detection technology based on a ground penetrating radar technology is provided for realizing active ranging guiding drilling, and simulation research is carried out on the working principle and the detection method of the adjacent well detection technology. By establishing an underground radar detection model, theoretical analysis is carried out aiming at the problems of propagation medium absorption boundary, a dispersion medium model, an iterative algorithm and the like, an antenna simulation model is established by using XFDTD, and simulation research is carried out on the propagation condition of radar signals in a stratum in a time domain range. The result shows that the ground penetrating radar technology can be used for underground adjacent well detection, and particularly, accurate anti-collision can be realized when the adjacent well is close. Thirdly, a drilling magnetic ranging anti-collision system model machine with 2 functions of ranging and inclinometry is developed according to the magnetic field distribution rule of the surrounding space of a well string in the well, and a g