Abstract
AbstractA novel chemical-consolidation method based foam amino resin system of sand control systems in the oilfield is reported. This sand control technique is more superior to the conventional method owing to its advantages such as the outstanding resistance and lower density as well as simple process preparation. The apparent density of the foam resin system ranges from 0.528 g/cm3 to 0.634 g/cm3 at room temperature. Moreover, the system has excellent foaming properties and excellent compatibility with the formation fluids. In addition, the foam amino resin sand consolidation system was optimized and investigated. Simultaneously, the sand-fixing performance of the foam resin system was comprehensively assessed. The optimized conditions are as follows: curing temperature, 60°C; curing time, 12 h; consolidated core compressive strength, 6.28 MPa. Furthermore, the consolidated core showed remarkable resistance to the formation fluids. In summary, the foam resin system effectively met the requirements of the sand control and the horizontal wells in the oilfield.
Highlights
In order to meet the requirements of oilfield operations, the foam system needs to carry enough of the resin solutions to achieve high compressive strength of consolidated core, which is intuitive for the performance for higher foaming volume V0
The surface of the sand was wet by injecting water with a plunger pump, and the foam resin sand consolidation system was pumped into the sand pack, ensuring that both ends are compact
The results further show that the decay half-life flattens after 45 min at a concentration of 2 × 104 mg/L salt
Summary
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