Description
"Despite spending money on well flushing, the water still doesn't come out." This is a real dilemma faced by many geothermal well operators. Especially for old wells that have been in service for many years, due to scaling on the wellbore, blockage of the thermal reservoir, and closure of fractures, the water production has severely decreased. Traditional well flushing methods (such as gas lift and backwash) can only "scratch the surface" and are difficult to penetrate deep into the formation to fundamentally solve the problem. At this time, the "perforation + acid fracturing" technology has become a real "life-saving" solution.
The first step involves perforation: using specialized tools to create targeted openings in the hot reservoir, breaking through the blockages in the sedimentary layer and existing fractures, essentially "guiding" the acid. The second step is acid fracturing: injecting chemical liquids such as corrosion-inhibiting acid, which simultaneously performs fracture fracturing and dissolves blockages under high pressure. This not only reactivates the sealed fracture system but also enhances the overall permeability of the reservoir through the simultaneous operation of "acid + fracturing".
Compared to simple well flushing, which can only clean the "surface layer of the wellbore", perforation + acid fracturing is more like a "deep physical examination + dredging surgery", truly entering the core area of the thermal reservoir and reconstructing the seepage channels. This technology is not only suitable for the treatment of old wells, but also widely applicable to the development and resumption of production of geothermal wells with low permeability, blockages, and undeveloped fractures.
The first step involves perforation: using specialized tools to create targeted openings in the hot reservoir, breaking through the blockages in the sedimentary layer and existing fractures, essentially "guiding" the acid. The second step is acid fracturing: injecting chemical liquids such as corrosion-inhibiting acid, which simultaneously performs fracture fracturing and dissolves blockages under high pressure. This not only reactivates the sealed fracture system but also enhances the overall permeability of the reservoir through the simultaneous operation of "acid + fracturing".
Compared to simple well flushing, which can only clean the "surface layer of the wellbore", perforation + acid fracturing is more like a "deep physical examination + dredging surgery", truly entering the core area of the thermal reservoir and reconstructing the seepage channels. This technology is not only suitable for the treatment of old wells, but also widely applicable to the development and resumption of production of geothermal wells with low permeability, blockages, and undeveloped fractures.