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PGA temporary plugging agent
PGA fully degradable temporary plugging agent is temporary plugging agent developed mainly with degradable materials to meet the needs of oil fields under various temperatures and working conditions.
https://www.eastnewmaterial.com/PGA-temporary-plugging-agent.html
PGA fully degradable temporary plugging agent is a series of temporary plugging agents developed mainly with degradable materials to meet the needs of oil fields under various temperatures and working conditions. It has the following characteristics:
Good blocking effect: the material itself has high strength and the particle size matching strength is high
Good degradability: completely degraded, no viscosity after degradation;
Good compatibility: does not react with fracturing fluid;
Time controllable: The blocking time can be adjusted by adjusting the material formula;
Safe and environmentally friendly: After degradation, water and carbon dioxide are eventually generated, which is pollution-free;
Easy to operate: it can be added directly to the sand mixing truck, easy to use, and does not stick to the pump.
Indoor test evaluation of PGA temporary plugging agent
Test unit: Southwest Petroleum University
Experimental equipment: high temperature and high pressure filter loss meter
Experiment name: Performance evaluation of temporary plugging materials for diverted fracturing
Experimental purpose: This project carries out experiments on optimizing the temporary crack plugging formula by designing and processing wedge-shaped fracture modules. For several fracture modules in fracturing, multiple sets of temporary crack plugging formulas are optimized to form a temporary plugging formula that meets the forward sealing pressure. The capacity is ≥10MPa, the reverse sealing pressure-bearing capacity is ≤2MPa, and the fracture permeability flowback recovery rate after the temporary plugging material is unblocked is ≥95%.
Experiment content
(1) Temporary plugging material particle size test (2) Temporary plugging material acid dissolution or natural degradation rate test
(3) Evaluation of the forward pressure-bearing capacity of the crack sealing layer
(4) Evaluation of the reverse pressure-bearing capacity of the crack sealing layer (5) Optimization experiment of temporary plugging material addition considering the sealing pressure-bearing capacity
(6) Optimization experiment of temporary plugging material addition considering plugging efficiency
(7) Evaluation of recovery rate of crack permeability after temporary plugging materials are removed
Technical indicators of PGA temporary plugging agent
| Project | Indicators | |||||
| Model | 40℃ | 60℃ | 90℃ | 120℃ | 150℃ | 180℃ |
| Exterior | powder, granules | powder, granules | powder, granules | powder, granules | powder, granules | powder, granules |
| Density g/cm3 | 1.1-1.6 | 1.1-1.6 | 1.1-1.6 | 1.1-1.6 | 1.1-1.6 | 1.1-1.6 |
| Particle size, mesh | 1-5mm; | 1-5mm; | 1-5mm; | 1-5mm; | 1-5mm; | 1-5mm; |
| 20-100mesh | 20-100mesh | 20-100mesh | 20-100mesh | 20-100mesh | 20-100mesh | |
| Dissolution time, h | 2-48 | 2-10 | 4-96 | 6-72 | 6-48 | 8-60 |
| Dissolution rate, % | ≥95 | ≥95 | ≥95 | ≥95 | ≥95 | ≥95 |
| Compressive strength, MPa | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 |
| Suitable for well liquids | Can be used in acid fluids and conventional fracturing fluids | |||||
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