Jianghan Petroleum Engineering Company: The old block "drills" a new speed

The old 1 oblique -6-2 well is located in the field of Laoxin Town, Jianghan Oilfield. During the season of rape blossoms, there are busy figures in red workers from time to time under the rig, which are hidden in the golden picture.

On March 31, the reporters gathered an exciting news here: As of 16:00 on March 29, Jianghan Petroleum Engineering Drilling Company's 30512JH drilling team drilled four wells this year and opened four of them, creating Jianghan Oil. The total footage of the single drilling team in the district broke the fastest record in the 10,000-meter mark.

“In the past, a well was drilled in Jianghan Oilfield, and the drilling cycle took 25 days to 40 days.” Wang Yuanhong, the well leader with 26 years of drilling construction experience, said that the 88-day total footage broke 10,000 meters, but I couldn’t even think about it.

After half a century of exploration and development, it is not easy to achieve drilling speed improvement in Jianghan old district. “In terms of geological structure, the target layer of the old and new blocks is in the Shashi Formation. Compared with other blocks, the geological age is older, the drillability is poor, and the speed increase is more difficult.” Wang Yuanhong said that it was played in the block last year. After the high-yield wells in Jianghan Oilfield, they took on the exploration of four new wells this year.

Increasing reserves and production is an important support for achieving the stability of old oil fields. Starting from the equipment transformation, Drilling Company eliminated 8 32-type drilling rigs last year and upgraded them to 30J drilling rigs. “In the past, the tower derrick was screw-connected, easy to fall off, and the safety hazard was large. The derrick after the replacement was modularized and the bolts were connected, and the well team could install it independently.” Fang Hong, secretary of the party branch of the team, said not only that. Drilling Company also borrowed the drilling mode of the Fuling Well Factory and equipped the rig with guide rails. The team adopted the well factory construction mode in the first three wells, the drilling fluid was reused, and the equipment relocation time was effectively shortened.

Technological innovation is an important support for drilling speed. Since the second half of last year, Drilling Company has continuously strengthened the optimization of technical parameters and drilling tool combinations. In view of the difficulty in making the upper stratum of the old block, they tried to use PDC bit orientation this year, while increasing the displacement and pump pressure to increase the hydraulic impact efficiency, optimizing the drilling tool combination, achieving stable stability, reducing the directional workload and improving the screw drill. Speed ​​purpose.

“The price of a screw is about 70,000 yuan and the service life is 150 hours. This year we extended the time to 280~300 hours, which is equivalent to a screw that has doubled the value. In addition, a drill bit also has a good 4350 meters. Results." Fang Hong said that the secret of success is also inseparable from management.

The drilling fluid is called the “blood” of drilling, which reduces the wear of the drill bit and the screw, increases the drilling speed, and is the key to the three-stage solid control equipment of the vibrating screen, the desander and the centrifuge. The data shows that the solid phase content exceeds 4% and the equipment wear will exceed 2 times. "For example, if you add medicines and add one bag an hour, if the operation map saves trouble, add two bags an hour, or all the brains are poured in, the performance of the mud will be greatly affected." Fang Hong said that the same live Children, different people can do very different effects. Therefore, the core of scientific drilling is in people, and it is strictly managed.

To this end, the team earnestly implemented the system of cadres to take classes and strictly control the process. In view of the fact that 60% of new employees accounted for, the cadre class “one-on-one” approach was adopted to strengthen the training of new employees and improve the skill level, ensuring that the various processes were interlocked. The rate of mechanical drilling was 21.66 m/h from last year. Increased to 32.8 m / h, 33.78 m / h, 36.34 m / h this year, the record is constantly refreshed and rewritten.

There is no end point for drilling speed improvement. Wang Yuanhong said that this year Jianghan Petroleum Engineering Co., Ltd. comprehensively carried out the work of establishing bids, benchmarking and tracking. Every time they hit a well, they compare with the highest indicators of the adjacent wells, draw a graph, and optimize the whole process. Through excellence, challenge ourselves, challenge the limits, and become the vanguard for the hard stability of the old oil fields.

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