Geothermal well layer-by-layer filter material feeding process

A process method and technology for geothermal wells, applied in the field of drilling, can solve problems such as reducing quality, and achieve the effects of reducing wear, prolonging life, and reducing repeated investment

Active Publication Date: 2011-08-10
河北伟业地热新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the water from the two aquifers is mixed, it will inevitably reduce the quality of the water taken

Method used

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  • Geothermal well layer-by-layer filter material feeding process
  • Geothermal well layer-by-layer filter material feeding process

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Embodiment Construction

[0020] The process method of layered filter material in geothermal wells, the process steps are: ①well diameter measurement, ②determine the height of each aquifer and non-aquifer height, ③determine the specific water extraction target layer in the aquifer, ④calculate each specific water extraction target layer The amount of filter material: ⑤Calculate the amount of clay in the non-intake layer and non-aquifer layer in the aquifer, ⑥clear the holes, ⑦change the slurry, ⑧down pipe, ⑨filter pipe flushing, ⑩filter material and clay injection.

[0021] The measurement of the well diameter is to determine the size of the well diameter by a physical measurement method, and to provide data for the next step of calculating the amount of filter material in the water aquifer. The determination of the height of each aquifer and the height of the non-aquifer is the method of geophysical logging. Methods include measuring spontaneous potential, resistivity, natural gamma, acoustic wave, well te...

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Abstract

The invention discloses a geothermal well layer-by-layer filter material feeding process which comprises the following steps of: (1) measuring a well diameter; (2) confirming heights of all water layers and heights of non-water layers; (3) confirming concrete water extracting destination layers in the water layers; (4) calculating the filter material dosage of all the concrete water extracting destination layers; (5) calculating the clay consumption of non-water extracting destination layers and non-water layers in the water layers; (6) cleaning holes; (7) replacing slurry; (8) placing a pipe; (9) washing the draining pipe; and (10) feeding a filter material and clay. The invention provides the geothermal well layer-by-layer filter material feeding process which is suitable for the geologic structure of the same geothermal well having a plurality of available water-quality and unavailable water-quality water layers and aims to use the water layers with higher water quality and seal the water layers with harmful water quality.

Description

Technical field [0001] The invention relates to a drilling method, in particular to a process method for layered filter feeding of geothermal wells. It is especially suitable for the geological structure of the same geothermal well with multiple aquifers with usable and non-water quality, and the purpose of using aquifers with better water quality and sealing off aquifers with harmful water quality. Background technique [0002] During the construction of geothermal wells, there are multiple aquifers at different depths, and the water quality of each aquifer is often different. Some aquifers have good water quality, and some aquifers have poor water quality. If the water from an aquifer is mixed and used, it will inevitably reduce the quality of the water taken. Therefore, it is one of the research topics to screen different water quality during the construction of wells, to avoid water treatment after the water reaches the ground, and to reduce equipment investment and operatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/02E21B47/08E21B47/00E21B47/06E21B43/02E21B43/00
Inventor 冯洪喜阴文行
Owner 河北伟业地热新能源科技有限公司
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