Acid-Soluble Lost-Circulation Materials
Acid-Soluble Bridging Lost Circulation Material
An acid-soluble bridging LCM formulated from specialty acid-soluble materials with composite modifiers. Its graded particles rapidly build a high-strength bridge across loss channels, and the plug dissolves completely in standard acidizing fluids (acid solubility of 75% or more), leaving no residue and avoiding damage to hydrocarbon flow paths.
APPLICATIONS
Application scenarios
- 01Fractured, vuggy and porous lost-circulation zones
- 02Reservoir sections where post-treatment acidizing is planned
- 03Oil, gas and shale-gas drilling
PERFORMANCE
Performance indicators
| Item | Specification | ||
|---|---|---|---|
| Appearance | Off-White Fibrous Powder, Non-Caking, Free-Flowing | ||
| Fineness | Medium-Coarse Type | Passing 40-Mesh Sieve % | 45-95 |
| Fineness | Fine Type | Passing 80-Mesh Sieve % | 25-85 |
| Moisture % | ≤5 | ||
| Acid Dissolution Rate % | ≥75 | ||
| Water-Soluble Matter Content % | ≤12 | ||
| Base Slurry Loss Before Plugging ml | Total Circulation Loss | ||
| Base Slurry Loss After Plugging ml | ≤35 |
Core advantages — High-efficiency plugging: a well-graded particle distribution quickly forms a tight bridging plug in loss channels and stops losses almost instantly, with a high success rate in fractured, porous, and vuggy loss zones. Complete acid solubility: fully dissolves in conventional acidizing fluids such as hydrochloric acid, leaving no residue, avoiding blockage of hydrocarbon flow paths, protecting subsequent productivity, and requiring no fishing operations. Excellent compatibility: compatible with all drilling fluid systems; does not change key mud properties such as viscosity and gel strength after addition, and causes no flocculation or precipitation. Stable performance: excellent temperature and pressure resistance; the bridging structure resists failure in complex formations and sustains the sealing effect long-term. Green and environmentally friendly: the base material contains no toxic or hazardous substances, and the acid-dissolved products are easily carried away by formation fluids, causing no secondary formation pollution.
USAGE
Usage
Add through the mixing hopper with good agitation, or prepare as an LCM pill; typical dosage is 5.0%-15.0% by weight depending on loss severity. Compatible with all common mud systems.
PACKAGING
Packaging & delivery
Standard moisture-proof bags. Once opened, reseal promptly and use up soon to prevent moisture absorption and caking.
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Acid-Soluble Bridging Lost Circulation Material