CN-121993156-A - Underground anti-collision tool safe drilling method based on passive magnetic detection

CN121993156ACN 121993156 ACN121993156 ACN 121993156ACN-121993156-A

Abstract

The invention relates to the technical field of oil and gas well drilling and completion, and discloses a safe drilling method based on a passive magnetic detection underground anti-collision tool, which changes the current situation of using the conventional passive magnetic detection underground anti-collision tool by virtue of original experience, the invention is a highly targeted technical means, and the application method of the passive drilling anti-collision magnetic detection tool can be more targeted, so that the field requirements of an oil field are met, the drilling and completion cost is reduced, and meanwhile, a data basis is provided for subsequent remote technical support.

Inventors

GAO YONGWEI
YANG HUIBI
WANG WENBIN
YANG XIAOFENG
QU XIANWEI
DENG KAI
LI YANZE
LI JING
Mou Daibin
HU XINGYU

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. A method for safely drilling a well based on a passive magnetic detection underground anti-collision tool, which is characterized by comprising the following steps: S1, determining the maximum bit pressure, bending amplitude, revolution, pump pressure, torque and working time which can be born by the underground anti-collision tool according to the compression bending fatigue test result of the passive magnetic detection underground anti-collision tool; S2, selecting a test stratum of a test well with good drillability, determining that the selected well section has no leakage, and then optimizing the size and the model of the drill bit; s3, knowing the drilling and completion time of wells around the well group, the number, coordinates, intervals and targets of the wells around the well group; s4, predicting the shortest distance range between the drilled well and surrounding well according to the drilling actual measurement data, determining the detection intensity of a passive magnetic detection underground anti-collision tool based on the lithology condition of the shortest distance between the drilled well and the surrounding well, and comprehensively setting anti-collision tool parameters; s5, sequentially connecting and assembling the PDC drill bit, the screw rod, the passive magnetic detection underground anti-collision tool, the centralizer, the underground measuring tool, the drill collar, the weighting drill rod and the drill rod to form a drilling tool; S6, after the wellhead is put into the drilling tool to a depth greater than the surface casing of the surrounding well, stopping putting into the drilling rod, starting a passive magnetic detection underground anti-collision tool, and detecting metal pipes possibly existing around by four magnetic probes of the anti-collision tool; S7, slowly pressurizing drilling, and drilling down to the bottom, when the drilling pressure, the revolution and the drilling time are increased, lifting the drilling tool at the wellhead and observing the downhole friction; s8, when the predicted drilling well approaches the underground anti-collision well section, stopping drilling at the well mouth, starting the passive magnetic detection underground anti-collision tool, detecting metal pipes possibly existing around by four magnetic probes of the passive magnetic detection underground anti-collision tool, and continuously drilling to ensure that the bit pressure and torque of the underground drill bit are smaller than 80-85% of the safe bit pressure and torque of the indoor test.
2. The method for safely drilling a well based on the passive magnetic detection underground anti-collision tool according to claim 1, wherein the passive magnetic detection underground anti-collision tool comprises a main body outer cylinder and a magnetic probe arranged on the main body outer cylinder.
3. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 2, wherein the main body outer cylinder is made of a titanium alloy material.
4. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 3, wherein the processing method of the titanium alloy main body outer barrel is as follows: Step a, slicing and checking two ends of a titanium alloy bar required by processing of the main body outer cylinder, wherein the difference of slice performance data of the two ends is less than 3% and is a qualified product, otherwise, the two ends are unqualified products; step b, selecting qualified titanium alloy bars to be clamped on a lathe spindle and starting a lathe, firstly turning on the surface of the bars, stopping a cutter, and carefully observing whether micro cracks or flaws exist on the surface; c, flaw detection is carried out on the primary turning surface by using magnetic powder, and whether micro cracks or flaws exist in the material or not is observed; step d, machining an axial deep hole of the main body outer cylinder on a lathe, and roughly machining the deep hole into a through hole, wherein in the machining process, the returning situation of chips is observed, if the returned cutting shape is abnormal, the machining is stopped and a new titanium alloy bar is replaced; Step e, after finishing the rough machining of the through hole of the main body outer cylinder, finely turning the through hole to a designed size; f, placing a peeping lens in the through hole, and carefully observing whether the inner surface of the through hole has cracks or not or the defect affecting the mechanical strength; Turning drill collar threads at two ends of the outer cylinder of the main body, and performing microscopic examination on the thread surface after the threads are machined; and h, machining a sinking groove on the surface of the main body outer cylinder, wherein the feeding amount of each time is 2-2.5mm in the machining process, and the rotating speed of a lathe spindle is 500-600 revolutions per minute.
5. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 4, wherein in the step b, when a cutter is turned on the surface of the bar, the cutter is fed by 5-6mm, and the rotating speed of a lathe spindle is 200-300 revolutions per minute.
6. The method for safely drilling a well based on the passive magnetic detection underground anti-collision tool according to claim 4, wherein the step b comprises the steps of continuously finish turning a tool on the primary turning surface of the bar, feeding the tool by 1-2mm, rotating a lathe spindle at a rotating speed of 400-450 rpm, stopping the tool, and carefully observing whether the surface has micro cracks or flaws.
7. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 4, wherein in the step d, the rotating speed of a lathe spindle is 400-500 revolutions per minute in the process of finishing the through hole on the lathe, and the depth of each cutter feed is 1.5-2mm.
8. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 4, wherein in the step h, during the process of sinking the groove, cooling liquid is sprayed at the contact part of the cutter and the surface of the bar.
9. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 4, wherein the titanium alloy bar required by the processing of the main body outer cylinder is placed outdoors for natural aging before the processing.
10. The method for safely drilling the underground anti-collision tool based on the passive magnetic detection according to claim 4, wherein after the sinking groove is machined, ultrasonic flaw detection is carried out on the whole outer barrel of the main body.

Description

Underground anti-collision tool safe drilling method based on passive magnetic detection Technical Field The invention relates to the technical field of oil and gas well drilling and completion, in particular to a safety drilling method based on a passive magnetic detection underground anti-collision tool. Background The current magnetic positioning tool which is relatively mature in China 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 carried out, and requirements of different production requirements on the passive type accurate magnetic detection anti-collision tool are further improved. Aiming at the development and experiment of underground anti-collision operation and tools, firstly, aiming at the development of a three-dimensional well pattern along with the gradual formation of a Fuling shale gas field, the anti-collision analysis of a main body area is more important in the drilling construction function in an upper and lower double-layer and well-to-well encrypted complex space. 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 simulation test and a field test of the model machine are performed for efficiently realizing the anti-collision of an adjacent well. The ground simulation test result shows that when the distance between adjacent wells is less than or equal to 15.31 m, the calculation error of the radial distance from the probe to the sleeve is less than +/-4 percent, and the calculation error of the direction is less than +/-4 degrees. The field test result shows that the measurement calculation result of the magnetic measurement while drilling anti-collision system is reliable, and the magnetic measurement while drilling anti-collision system can be used for cluster well anti-collision operation. The research result can provide reference for the research of the adjacent well anti-collision technology. The method is characterized by comprising the steps of analyzing and summarizing the reasons of the collision of the well holes according to the current research situation of the collision prevention technology of the intensive cluster wells at home and abroad by combining with the field collision prevention monitoring operation experience, analyzing the existing well hole track optimal design method, the well hole track accurate control technology, the well hole track error model, the well hole track real-time three-dimensional visualization, the collision prevention risk evaluation index, the collision prevention operation requirement, the collision prevention monitoring technology and the like, and discussing the development trend of the future collision prevention technology of the intensive cluster wells based on the application of big data and artificial intelligence in oil-gas field development. The research and analysis of the cu