Oil and Gas Sector
Engineering Background
During oil and gas drilling, it is common to encounter fluid loss in fractured reservoirs and wellbore instability. As oilfields enter the high-water-cut stage, they also face challenging development issues such as water breakthrough and declining recovery rates.
Technical Challenges
Conventional sealants cannot seal fine cracks smaller than 0.5 mm.
Water channeling exhibits “high conductivity—low resistance,” making traditional water-blocking methods prone to failure.
Product Corresponding Features
Ultrafine particle gradation: It can penetrate cracks measuring 0.1–0.5 μm, forming an ultra-low-permeability barrier.
Strength performance: The consolidated body can withstand a pressure of up to 15 MPa and effectively restore drilling fluid circulation.
Profile control and water plugging function: Change the injection and displacement direction of water in the formation to improve oil recovery efficiency.
Professional Processes and Parameters
Leak-sealing process: Use ultra-fine cement slurry to seal the lost circulation zone; the slurry has low viscosity and high permeability.
Profile modification and water plugging: Targeted plugging of preferential flow channels in the formation to enhance crude oil recovery.
Recommended parameters: Grouting pressure: 3 MPa – 8 MPa; water-to-cement ratio: 1.2 – 1.5
Engineering benefits
Significantly reduce non-productive time (NPT).
Increase the recovery rate in the later stages of oilfield production (EOR increase by 5–10%).
Corresponding target department
Oilfield Drilling Research Institute, Oil Production Technology Institute, and Downhole Operations Company.
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