Experimental Study of Measuring Algorithm Accuracy of the Electromagnetic Distance Measurement Anticollision Tool

Cui Li,Lei Li,Yuanwei Sun,Yuzheng Zhao,Ruichao Zhang,Bing Hou

doi:10.1155/2022/1518320

Cui Li, Lei Li + Show 4 more

Open Access

https://doi.org/10.1155/2022/1518320

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Abstract

In order to prevent collision of complex structure well, accurate measurement of the distance of adjacent wells must be required during the development of the unconventional reservoir. The precision of the traditional survey tools and scanning software is not accurate enough. Based on the electromagnetic anticollision measuring calculation method, the electromagnetic anticollision detection tool was designed and simulation experiments were carried out. The influence of different position relations between sensor and casing on magnetic field strength detected by the sensor was analyzed. When the sensor and the casing were parallel and the distance of them was 0.5 m∼3 m, the tool could calculate accurately the distance and orientation of the adjoining well. When the angle between the sensor and the casing was within 50°, the calculation result was accurate. This research result validated the accuracy of the principle of the electromagnetic anticollision tool while drilling cluster well, and it could provide theoretical support for the development of electromagnetic detection tools.

Highlights

With the increasing difficulty of oil and gas resource exploration, the drilling technology of complex structure wells has become a key technology for the low-permeability, unconventional, and offshore oil reservoir [1,2]. e horizontal wells, infill wells, and cluster wells have been used to develop low-grade oil and gas resources
Some electromagnetic detection tools can be used to measure the distance of adjacent wells accurately, these tools require additional equipment such as magnetic sources or probes to be run in the adjacent wells [9,10,11]
In order to measure the distance between adjacent wells while drilling, electromagnetic detection tools must be installed in downhole BHA. eoretically, the smaller the distance between the tool and the bit is, the better the effect is

Summary

Introduction

With the increasing difficulty of oil and gas resource exploration, the drilling technology of complex structure wells has become a key technology for the low-permeability, unconventional, and offshore oil reservoir [1,2]. e horizontal wells, infill wells, and cluster wells have been used to develop low-grade oil and gas resources. Some electromagnetic detection tools can be used to measure the distance of adjacent wells accurately, these tools require additional equipment such as magnetic sources or probes to be run in the adjacent wells [9,10,11]. This affects the normal production of the wells and increases the cost [12,13,14]. Based on the principle of active anticollision ranging, cluster wells anticollision electromagnetic signal acquisition system was designed. A collision avoidance estimation was established based on magnetic difference signals [17]

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Conclusion