CN-121993153-A - Magnetic probe arrangement method for improving magnetic detection effect of underground anti-collision tool

CN121993153ACN 121993153 ACN121993153 ACN 121993153ACN-121993153-A

Abstract

The invention discloses a magnetic probe arrangement method for improving the magnetic detection effect of an underground anti-collision tool, which belongs to the technical field of oil and gas well drilling and completion engineering design research and development and construction, and comprises the steps of taking a well for magnetic detection in a drilling process as a base point in the design, taking the detection range of the magnetic probe of the magnetic detection type anti-collision tool as a radius as a virtual circle, and enabling the center of a sleeve to be detected to be positioned on the virtual circle line; two radius lines are made from the base point and tangent with the sleeves on the round line, the outer diameter sizes of all the sleeves can be detected on the magnetic detection type anti-collision tool are determined by combining the field conditions, meanwhile, the number of circumferentially arranged magnetic probes is determined, the underground anti-collision tool and the magnetic probes are arranged according to the outer diameter sizes, and the magnetic detection operation is carried out by adopting the arranged anti-collision tool to obtain detection results. The invention improves the magnetic detection effect through the design of the magnetic detection type underground anti-collision tool.

Inventors

ZHAO WENZHUANG
JIN HONGSHENG
GAO YONGWEI
YANG XIANLI
XU CHAOYANG
LIU KEQIANG
CHEN CAIZHENG
YANG XIAOFENG
HE WANG
REN WEIMING

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 (9)

1. The magnetic probe arrangement method for improving the magnetic detection effect of the underground anti-collision tool is characterized by comprising the following steps of: taking a well for magnetic detection in the drilling process as a base point, and taking the detection range of a magnetic probe of a magnetic detection type anti-collision tool as a radius to make a virtual circle, so that the center of a sleeve to be detected is positioned on the virtual circle line; Step two, determining that the magnetic detection type anti-collision tool can detect the outer diameter sizes of all the sleeves, and simultaneously determining the number of circumferentially arranged magnetic probes; Arranging an underground anti-collision tool and a magnetic probe according to the outer diameter size; And fourthly, performing magnetic detection operation by adopting the arranged anti-collision tool to obtain a detection result.
2. The method for arranging the magnetic probe for improving the magnetic detection effect of the underground anti-collision tool according to claim 1, wherein in the third step, the underground anti-collision tool is divided into a plurality of transmitting units along the axial direction according to the designed effective length of the underground anti-collision tool, and a plurality of subunits are uniformly distributed in the circumferential direction of each transmitting unit.
3. The method for arranging the magnetic probes for improving the magnetic detection effect of the underground anti-collision tool according to claim 2, wherein the plurality of transmitting units are divided into three groups, wherein the magnetic probes in one group of transmitting units are perpendicular to the surface of the tool and directly detect the adjacent well casing, the magnetic probes in the second group of transmitting units intersect one side of the surface of the tool at an angle to detect one side of the adjacent well casing, and the magnetic probes in the third group of transmitting units intersect the other side of the surface of the tool at an angle to detect the other side of the adjacent well casing.
4. A method of arranging a magnetic probe for enhancing the magnetic detection effect of a downhole anti-collision tool as claimed in claim 2 or 3, wherein the downhole anti-collision tool is divided axially into at least three transmitting units.
5. A method of arranging a magnetic probe for enhancing the magnetic detection effect of a downhole anti-collision tool as claimed in claim 4, wherein the designed downhole anti-collision tool has an effective length of 2400mm.
6. The method for arranging a magnetic probe for improving the magnetic detection effect of a downhole anti-collision tool according to claim 5, wherein the downhole anti-collision tool is axially divided into 21 emission units, and each two emission units are separated into one group.
7. The method for arranging the magnetic probe for improving the magnetic detection effect of the underground anti-collision tool according to claim 1, wherein in the second step, two radius lines are made from a base point to be tangent with the sleeve on the round line, and the outer diameter sizes of all the sleeves on the magnetic probe anti-collision tool can be detected by combining the field condition.
8. The method for arranging a magnetic probe for improving the magnetic detection effect of a downhole anti-collision tool according to claim 7, wherein in the second step, the magnetic detection anti-collision tool can detect that the outer diameter size of all the casings is 172mm.
9. The method for arranging magnetic probes for improving the magnetic detection effect of a downhole anti-collision tool according to claim 1, wherein in the second step, the number of the circumferentially arranged magnetic probes is determined to be 25.

Description

Magnetic probe arrangement method for improving magnetic detection effect of underground anti-collision tool Technical Field The invention relates to the field of oil and gas well drilling and completion engineering design, research and construction, in particular to a magnetic probe arrangement method for improving the magnetic detection effect 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, so that requirements of different production requirements on the passive type accurate magnetic detection anti-collision tool are met, and meanwhile, the industry blank of the technology is filled. Aiming at the problems of design, research and application of the underground magnetic detection type anti-collision tool, the following similar technology is widely inquired: 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 ground magnetic ranging process