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Shallow reservoirs frequently experience sand-related challenges due to insufficient consolidation strength, resulting in operational issues such as equipment wear, erosion of flow lines, damage to surface separators, reservoir degradation, reduced well productivity, and even perforation blockages. One approach to address these problems sustainably is using chemical sand control consists of an epoxy-resin sand consolidation treatment, utilizing hydrocarbon-based fluid as a pre-flush and post-flush agent.

Traditionally, the treatment process for this resin fluid involved using pure diesel (B0), which demonstrated excellent consolidation strength and permeability restoration in situ. However, in response to client requirements and support government initiatives, a mixture of pure diesel and biodiesel known B-35 diesel, which contains 35% palm oil has been introduced as a pre-flush and post-flush system in the treatment process. This approach not only reduces the cost, but also reduce environmental impact compared to conventional chemical treatments.

Several laboratory experiments were conducted and confirmed the compatibility and effectiveness of epoxy resin materials with B-35 diesel, proven with no significant difference in cure time between B0 and B-35 diesel. Crush cube test showed a good compressive strength up to 1,313 psi while coreflow crush test shows 1,279 psi compressive strength in 20-day shut in period. Result demonstrated a regained permeability of 76.4% of the initial value with 3 PV overflush.

Four (4) wells trial with various permeability and wellbore geometry have been treated, achieving exceptional results, including a designable curing time up to 12 hours and compressive strengths of up to 1,758 psi. The epoxy resin system has been successfully deployed in B-35 diesel environment using bullheading and coiled tubing (CT) placement with 1-1.5 PV overflush. Initial gas production of those 4 wells ranging from 1.6 to 3.5 MMscfd with no sand production, proving successful sand consolidation treatment using epoxy resin in B-35 diesel.