China Geo-Optical Bureau "Magnetic" application technology has reached the international advanced level

Since ancient times, there has been a saying called "Going is easy to get into the earth." Humans can use astronomical telescopes to observe vast expanse of hundreds of thousands of light years away, but beneath the earth's surface—the depths of the land we tread—it is a murky water. It is almost impossible to explore the mysteries of the depths underground. Completed tasks.

Nowadays, a new technology allows us to realize the “needle threading” in the underground. This is the “high-precision” technology for connecting and connecting wells. This technology has also become the underground “navigation” of boreholes, which can connect well groups that are located several hundred meters or kilometers apart in underground mines. It is understood that the core of this technology is the "Hui magnetic" high-precision middle target guidance system, which originated from the "high-precision directional drilling target target system" project undertaken by the China Geological Survey Bureau. The project was established by the China Geological Survey in 2008, aiming to establish a target model for directional drilling through experimental research, guide drilling into the target area, and achieve accurate targets.

In recent years, the China Geological Survey has been fully supporting and supporting the R&D and breakthrough of this technology. It is understood that the achievements of “Hui Magnet” high-precision middle target guidance system currently have completely independent intellectual property rights, breaking the monopoly of foreign companies, and making China Survey Bureau of Surveying and Development become the first domestic company, following the United States globally. The second company that owns this technology has reached the international advanced level. This technology is more advanced than some foreign technologies: it is the first low-voltage rechargeable battery power supply that can be used in coal mines and other high-risk operating environments (US instruments use 220V power supply, not suitable for coal mines, etc.); Diameter and length of 42 mm and 1.4 m, respectively, can be used to run down the probe tube through the 60 mm diameter center tube to the bottom of the well (45 mm, 1.9 m for the U.S. instruments, minimum 73 mm diameter center tube) and can be completed Directional well guidance with smaller radius of curvature.

When it comes to “Magnet” technology, it also has to talk about its research team, Professor Hu Hanyue, director of the Directional Drilling Department of the Exploration Institute. Under the leadership of Hu Hanyue, the team has been engaged in the research and development of directional drilling technology for many years. With the help of a team of geologists who are unwilling to accept the spirit and persistent enthusiasm, the team has combined practice and scientific research to finally develop the “Hui Magnetic”. technology. The news that the technology was successfully developed has been buoyed by the fact that it has caused quite a lot of vibrations in the circle. The same products in the United States that had previously occupied technological superiority can only drastically reduce the prices of products and services, and they are only struggling.

Service "One Belt and One Road" strategy:

Chinese technology is rooted in Turkey

In the national “Belt and Road” strategy, Turkey, as an important node that spans Eurasia, has a significant geographical and strategic position.

In 2009, for the first time, "Hui-magnetic" high-precision middle target guidance system was applied to the measurement of real wells. It is the BEYPAZARI trona collection and extraction project in the northwest of Ankara, Turkey. Nearly 200 million tons of trona are stored in a local area of ​​20 square kilometers of hills. From 2009 to 2010, the exploration institute cooperated with local alkali mines and successfully completed the construction of 23 pairs of contiguous wells in the area. Well group types include the Mitsui well group, the Sijing well group, and the dual channel well group.

With the success of the first application, the "Magnet Magnetic" drilling guidance system began to participate in a large number of target operations in docking. In 2014, the Exploration Institute signed the Phase IV and Phase 5 contracts of the BEYPAZARI natural soda mine drilling project as an independent contractor, involving a total of 145 wells, and all of the construction achieved the expected results.

In particular, it is worth mentioning that this time the construction also completed the world's largest drilling project using the water-soluble mining method of the butt joints. On September 10, 2015, the drilling of the underground underground project in Kazan, Turkey, undertaken by the exploration site marked the official kick-off of the world's largest water-collection brine project for butt joints. The core technology used in this project is “Magnetism” technology, which is designed to provide brine brine for a 2.5 million tpa soda plant in Kazan, and a total of 74 horizontal wells for bittern mining will be constructed between 2015 and 2018. The group has a total of 222 single wells.

During the successful application of "Magnet" technology in Turkey, the Exploration Institute creatively designed and realized the connectivity of the multi-well group, which truly made the underground "needle-in-needle" technology a reality. At the same time, the exploration site has boldly innovated in construction, overcame the difficulties of complex stratigraphic structures, abnormal geomagnetic fields, and severe ground fractures, accumulated rich experience in handling complex problems, and promoted other advanced technologies such as target guidance systems in the “Magnet” orientation to other areas. The country has laid a solid foundation for promoting and contracting international projects.

Service new energy exploitation:

CBM exploration and application

Since the introduction of the RMRS rotary magnetic ranging system produced by Vector Company in the field of coal seam gas, the major breakthroughs have been made in the construction technology of oriented butt joint wells in the field of coalbed methane and water-soluble mining in China. However, most applications are still limited to the traditional U-shaped well group (well group consisting of one vertical well and one horizontal well).

In the Huajin Coking Coal Liulin Coalbed Methane project implemented by the exploration, the DS well group is a coalbed gas well group consisting of two horizontal wells. It is not easy to realize the docking of the two wells. Because the target system of the "Hui magnetic" drilling has the advantages of no need of external power supply, small volume, Chinese software interface, etc., it can accurately measure the azimuth deviation, apical angle deviation and distance between the drill bit and the target point, so the coal gas well group adopts " "Magnet" technology enables Well 2 to achieve "point-to-point" docking. This is the first time in China that the horizontal wells used for surface construction have been connected to horizontal wells for roadway construction.

With the high-precision performance of “Magnetism” technology, Shalin Coal Mine in Liulin, Shanxi Province has successfully implemented a horizontal hole with a horizontal angle of 1,500 meters in the ground and a horizontal angle of 106 degrees in the coal roadway. Docking, achieved a "point to point" of the precise connectivity.

The Unicom of this well not only guarantees the safety of underground mining of the mine, but also improves the exploitation and utilization of energy. It is understood that the project has two main branches and four side branches. The two main branches are respectively docked with downhole gas drainage drill holes. After successful docking, underground gas pre-drainage is performed. At present, one of the branches has entered the trial extraction period. According to the data collected, the branch has a daily gas production of 10,000 cubic meters or more, a gas concentration of 90% or more, and a gas flow rate of up to 10 cubic meters per minute. The gas production of this horizontal well has exceeded the expected effect. According to the past results of similar wells, the output of the well will continue to rise and it is expected to create a new gas record.

Serving solid mineral water-soluble mining:

Natural alkali mine, salt mining application

When water-soluble mining methods are combined with directional well-joining technologies, a low-input, high-output, high-efficiency, green and environmentally friendly mining method is born. Especially in the field of drilling water-soluble or hydraulic mining of salt, alkali, phosphorus, and thenardite, the use of oriented butt-jointed wells is a method to do more with less. Not only is the mine investment small, but also it has the smallest footprint, and there is no tailing at the surface. Up to 3000 meters, this is undoubtedly a green and environmentally friendly mining method.

In November 2014, the exploration site in Henan Anpen natural alkali mine used this technology to guide the SP01 horizontal well and its target well to achieve a butt connection, with a depth of 2850 meters, creating the deepest deepwater bathing solution in the world Record. After the well group was connected, the brine concentration was as high as 120 g/l at a water injection flow rate of 60 m3/h, and the objective of stable production and high production was successfully achieved. This achievement is another breakthrough after the exploration site where the salt mine in Hubei Sanonda reached 2800 meters deep, which set a new record for horizontal butting wells.

Henan Anping natural alkali mine is one of the large-scale natural alkali mines found in China, and it is the world's deepest buried natural alkali deposit. The horizontal wells used in the exploration have a depth of more than 2800 meters. The seam is composed of interbedded layers and interlayers with thickness ranging from 0.1 meters to 1 meter. The top, bottom, and interlayer of the seam are mainly dolomite. Moreover, the ore deposits in the area are extremely unstable, and the undulations are relatively large. After the electric logging, the mine seam was finally determined after 3 times of comparison. In addition to using a reasonable drilling tool assembly and wellbore structure, the drilling technology implemented in the exploration has adopted special processing methods in well track trajectory control, including the use of a wireless LWD inclinometer, the introduction of a geosteer to guide the drill bit and the use of the same. The deep-hole high temperature magnetic target instrument independently researched and developed by the company. Practice has shown that the instrument has achieved a successful target in a single instruction. This mode of industrial production and scientific research results has closely demonstrated the future research work of the exploration institute.

It is understood that in the country, the "Magnet" drilling target guide system produced by the exploration has become the standard for water-soluble mining drilling equipment and is playing an increasingly important role. According to incomplete statistics, since the successful test of the “Huimag” system in 2009, more than 100 docking connectivity guidance operations have been successfully completed so far, and 100% connectivity has been achieved. At present, in the field of saline-alkaline brine mining in China, the market share of “Magnet” has surpassed that of the US RMRS instrument.

Open up new areas of service:

Avoid obstacles, prevent collision, guide roadway excavation

In the drilling area, there are sometimes abandoned wells or other underground pipelines that need to be avoided during drilling. Magnetic guidance can be used to guide the drilling to avoid these obstacles.

In April 2013, a good news came from Dalian Lushun, and the Exploration and Settlement was completed successfully by the Beijing Wandi Geological Engineering Co., Ltd. due to geological reasons. The project required to bypass the accident head located 1394 meters deep in the well. Because the accident stratum is phyllite, the hardness reaches 7~8 grades, and the conventional drilling rate is only 20~30 cm/hour, which makes construction difficult. The successful implementation of this barrier project fully demonstrated the strong technical strength and teamwork spirit of the exploration institute, which opened up a new application field for directional drilling technology.

The "Magnet" drilling guidance system can also be used to guide the communication between the borehole and the roadway. In February 2014, the “Magnet Magnetic” drilling guidance system of the Exploration Institute successfully guided the roadway excavation in Yangjiawan Iron Mine, Lushi County, Sanmenxia, ​​Henan Province, and realized its connection with the borehole. In the process where the drill hole and the roadway penetrated before, the connection failed because the drilling inclination was interfered by the ferromagnetic metal ore. After the technicians of the exploratory site arrived at the construction site, after 7 hours of underground roadway and ground measurement operations, the owner was provided with deviation measurement results of the drilling relative to the roadway. The mine excavated the roadway according to the measurement results provided by the exploration, and the tunnel and the borehole were connected in just over 1 day.

Service Mine Rescue:

First attempt of "Magnet"

After successfully drilling the mine in Chile, the exploration institute innovatively proposed a set of positioning and rescue hole orientation guidance technology for the personnel trapped in the well using the “Hui magnetic” system: the magnetic beacon device is preset in the mine underground, and after the occurrence of the mine disaster It can be activated by trapped personnel. The magnetic beacon can emit magnetic signals continuously for more than 30 days, which is used to prompt the underground personnel and their location, and accurately guide the ground rescue hole into the trapped area to improve the rescue effect and efficiency.

At the scene of the collapse accident at the Yurong Gypsum Mine in Pingyi, Shandong, the technical staff of the exploration institute proposed the above-mentioned plan, completed the technical preparation and ground verification on site as an alternative plan, and obtained the production rescue rescue command center and project. The construction unit was highly affirmative, and the magnetic beacon was delivered into the well to the trapped miners. Finally, due to the success of the life-saving wells, the rescue plan of the exploration institute failed to be implemented, but it also completed the first attempt of China’s “Magnetic” system in the mine rescue and provided an alternative high-tech means for the rescue of mines.

After the "Magnet Magnetic" medium target guidance system successfully connected the first pair of wells on the Turkish site in October 2009, its application field is continuously expanding and the level of technology has been continuously improved. From foreign drilling markets to the domestic drilling market, from natural alkali mines to salt mines, to coal-bed methane fields, it broke the monopoly of foreign products of similar products, gradually formed the advantages of localized technical services, and allowed the exploration companies to walk in the field of directional drilling. Forefront.

At present, under the support of China Geological Survey Bureau’s public welfare industry research and special funds program, the exploration is underway to upgrade the “dark magnetic” target system for deep-hole high-temperature magnetics. The results will be used in future shale gas exploration and development markets and underground thermal energy development. The expansion of applications, play an important role in the development and application of mine rescue wells, and provide a solid technical support for China's shale gas exploration and development, underground thermal energy development, mine rescue and other aspects.