Geothermal storage layer transformation method
A reservoir and geothermal technology, applied in geothermal energy power generation, chemical instruments and methods, heat collectors using groundwater as a working fluid, etc., can solve the problems of not being able to effectively increase the water production of geothermal reservoirs, and achieve good application results. Improve profile and reduce waste of resources
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Embodiment 1
[0038] The transformation method embodiment 1 of the geothermal reservoir of the present invention adopts the following steps:
[0039] 1) According to the porosity and permeability data of each water layer in the geothermal well, the heterogeneity of the geothermal well is divided; in the geothermal well with weak heterogeneity, the porosity of each water layer is less than 15% , the permeability is less than 7mD.
[0040] The physical property data of each water layer in Well Xi-SSSS-3 are shown in Table 2.
[0041] Table 2 Physical property data of each water layer in Well Xi-SSSS-3
[0042]
[0043] According to the data in Table 2, Well Xi-SSSS-3 is a geothermal well with weak heterogeneity.
[0044] 2) Inject pretreatment fluid into the geothermal reservoir of Well Xi-SSSS-3, then repeatedly inject acid fracturing pre-fluid and acid fracturing working fluid, and then inject replacement fluid.
[0045] The composition of the pretreatment solution is: 20.0% hydrochlo...
Embodiment 2
[0058] Embodiment 2 of the transformation method of the geothermal reservoir of the present invention adopts the following steps:
[0059] 1) According to the porosity and permeability data of each water layer in the geothermal well, the heterogeneity of the geothermal well is divided; in the geothermal well with weak heterogeneity, the porosity of each water layer is less than 15% , the permeability is less than 7mD.
[0060] The physical property data of each water layer in Well HTJY-1 are shown in Table 5.
[0061] Table 5 Physical property data of each water layer in Well HTJY-1
[0062]
[0063] It can be seen from Table 5 that the physical properties of No. 1 layer, No. 7 layer and other layers show obvious differences, and Well HTJY-1 is a geothermal well with strong heterogeneity.
[0064] 2) Inject pretreatment fluid into the geothermal reservoir of Well HTJY-1, then repeatedly inject acid fracturing pre-fluid and acid fracturing working fluid, and then inject di...
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