Single-well water pumping and recharging system
A hydrothermal and water layer technology, applied in directional drilling, wellbore flushing, drilling equipment, etc., can solve the problems of unfavorable commercial development and increased cost of geothermal exploitation
Pending Publication Date: 2022-08-09
刘洪斌
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In this way, the cost of geothermal exploitation will be greatly increased, which is not conducive to commercial development
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[0007] ① Determine the design plan according to the geological data and carry out drilling construction according to the design plan. After the vertical well is drilled, logging and completion operations are performed, that is, casing cementing is performed, and then perforation, water pumping and well flushing operations are performed.
[0008] ②According to the actual drilling geological data and data of the drilled vertical wells, determine the trajectory and construction plan of the windowed recharge wellbore, and carry out drilling construction according to the design plan. First, the plug is set at the lower part of the side-drilling point (about 50 meters) to prevent the water layer from being polluted by particles during drilling. Then run the ramp at the sidetrack point for window drilling. After drilling, the casing should be run, and the screen pipe should be run in the water layer well section. After the completion of the well, a large-displacement pumping and wa...
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According to the single-well water pumping and recharging system, two tasks of water pumping and recharging are integrated into one well through the well drilling technology. (1) determining a design scheme according to geological data and performing drilling construction according to the design scheme; after drilling of the vertical well is completed, well logging and well completion operation, namely casing running and well cementation, are carried out, and then perforation, water pumping and well washing operation are carried out. And (2) determining a track and a construction scheme of a windowing recharge borehole according to actual drilling geological data and data of the drilled vertical well, and performing well drilling construction according to a design scheme. Firstly, a blanking plug is put into the lower portion (about 50 meters) of a windowing sidetrack drilling point for setting so as to prevent a water layer from being polluted by particles in the drilling process. And then a whipstock is put down at the sidetrack drilling point for windowing drilling. After drilling is completed, a sleeve is put, and a screen pipe needs to be put in a water layer well section. And after well completion, large-displacement water pumping and well washing operation is carried out to dredge main water layer gaps so as to guarantee the water permeability. (3) the whipstock and the blanking plug are pulled out, a water pumping sleeve is put down, a packer is arranged, and the setting position is about 50 m below the sidetrack drilling point.
Description
1Technical field [0001] The present invention is a method of geothermal energy development technology. It involves related science and technology in the fields of geothermal energy, geological tectonics and oil drilling technology. 2 Background technology [0002] At present, 100% recharge of hydrothermal sandstone thermal storage and limestone thermal storage is a problem that must be solved in geothermal energy mining. At present, the high efficiency can realize one pumping and one filling, and the pumping and filling are balanced. This will greatly increase the cost of geothermal mining, which is not conducive to commercial development. [0003] In order to better develop and utilize the clean energy of geothermal energy, it can serve the human society. Under the premise of ensuring the safety of the environment and resources, extensive commercial development is the only way to achieve this goal. [0004] In order to reduce the cost of geothermal development to improv...
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IPC IPC(8): F24T10/20E21B7/20E21B7/06E21B21/00
CPCF24T10/20E21B7/20E21B7/06E21B21/00Y02E10/10
Inventor 刘洪斌
Owner 刘洪斌