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Solid Acid Reservoir Acidizing
Overview

The main component of solid acid is acid ester, which has no acidity in solid state. and forms the corresponding carboxylic acid after dissolution in water, which can dissolve formation rocks. In the aqueous solution, when reaching a certain temperature, the solid acid undergoes a chemical reaction to form an organic/inorganic acid, which produces physical and chemical effects on special blockages in the reservoir, and finally transforms into "soluble complexes" to achieve the purpose of reservoir reconstruction and plugging removal.

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According to different formation characteristics and types of blockages, select corresponding solid acids to form a reservoir reconstruction fluid system, which mainly includes:
Carbonate rock acidizing/acid fracturing stimulation system
Sandstone acid fracturing stimulation system
Water well unblocking and injection increase, oil well unblocking and production increase system
Depolymerization and degradation of residual polymers in the wells
Fluid system for removing plugging in formations containing FeS scale, calcium sulfate scale
Reconstruction fluid system for cement slurry polluted formation, acid-sensitive formation
All products are solid particles that reaction speed is slow and does not damage the reservoir rock skeleton.
The product does not contain oxidants, organic chlorine, benzene, aldehyde, ether, phenol and other harmful substances. The fluid after operation is treated as conventional flowback fluid, and the injection well is injected directly without treatment.
It has been applied in more than 200 wells in various types of reservoir reconstruction wells, and the main application types include:
Large-scale acid fracturing of carbonate oil wells (solid acid-S798)
Conventional sandstone well plugging removal and production/injection increase (solid acid-S798)
Gas well polymer plugging removal and production increase (solid acid-S798)
Pre-solid acid reservoir reconstruction (solid acid-S798 + solid acid-S)
Carbonate gas well acid fracturing (solid acid-S798 + solid acid-C)
Sandstone oil well stimulation (solid acid-N)
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