Method for preheating rock salt bittern of directional butted well
A technology of directional wells and docking wells, which is applied in household heating and other non-combustion heat generation and application, can solve the problems of low conversion rate of geothermal energy utilization, reduce pipeline scaling, speed up brine flow rate, and reduce consumption Effect
Inactive Publication Date: 2017-11-24
中盐勘察设计院有限公司
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Problems solved by technology
my country has good conditions for geothermal resources. At present, the utilization methods of geothermal resources in my country are mainly heating, bathing, planting, etc., and the conversion rate of geothermal energy utilization is still very low.
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[0025] A method for preheating rock salt brine with directional docking wells of the present invention, the structure of the brine transport channel used in the method is as follows figure 1 shown. Taking a rock salt production enterprise as an example, its ore deposit is buried at a depth of 400 meters, and the temperature of the brine produced by the water-soluble drilling method is about 30°C. The production scale of the mine is 4 million cubic meters per year, and the production of solid salt is 1.2 million tons per year.
[0026] Choose two drilling locations that are convenient for construction near the salt workshop, and the ground distance between the two drilling locations is 600m; construct vertical well 1 at one of the drilling locations, and the drilling depth of the vertical well 1 is 3500m. The formation temperature in the depth is 95°C, and the casing is run in the vertical well 1 to complete the well;
[0027] A directional well 2 is constructed at another dr...
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The invention discloses a method for preheating rock salt bittern of a directional butted well. Two well drilling positions facilitating construction are selected from the area close to a salt manufacturing workshop; a vertical well is constructed at one well drilling position, the well drilling depth of the vertical well is 2500-5000 m, the formation temperature at the bottom of the vertical well is 75-140 DEG C, a casing pipe is put in the vertical well to form a well; a directional well is constructed at the other well drilling position, the bottom of the directional well and the bottom of the vertical well are communicated, a deflecting section is arranged at the lower end of the directional well, and a casing pipe is put in the directional well to the target point position in butt joint and communication with the vertical well to form a well; the upper end of the directional well is connected with a first main bittern delivery pipeline, the upper end of the vertical well is connected with a second main bittern delivery pipeline, the first main bittern delivery pipeline, the directional well, the vertical well and the second main bittern delivery pipeline jointly form an airtight bittern delivery pipeline, exploited rock salt bittern is preheated through the bittern delivery pipeline and then is delivered to the salt manufacturing workshop. The production cost of salt manufacturing enterprises can be effectively reduced by adopting the method, and the process is simple.
Description
technical field [0001] The invention relates to the technical field of geothermal energy utilization and rock salt production, in particular to a method for preheating rock salt brine with directional docking wells. Background technique [0002] Rock salt mines are generally mined by drilling and water-soluble method. The product obtained from the mining is brine, and then the brine is transported to a vacuum salt making device to use steam to boil, evaporate and crystallize the brine to obtain solid salt. The brine used by existing salt-making enterprises to generate solid salt is usually not preheated first, and directly enters the vacuum salt-making device after being purified by brine from the mine. For mines with shallow deposits, the temperature of the brine produced by the drilling water solution method is relatively low, generally around 30°C, and a large amount of steam is consumed during the salt production process (steam is usually produced by heating coal, which ...
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IPC IPC(8): F24J3/08
CPCF24T10/10F24T2010/50Y02E10/10
Inventor 张乐樊传忠肖文科尹科明周志刚续培信
Owner 中盐勘察设计院有限公司