Coated proppants with self-suspension and tracer slow-release functions

Proppants play an important role to increase oil and gas output in shale development process. Tracers are used study the degree of heterogeneity dynamic equivalence between injection production wells judge state reservoir. However, it is difficult integrate both slow-release tracing supporting functions one material. The functional coated proppants with tracer function great significance. Here a simple method developed introduce carbon quantum dots (CQDs) into polyvinyl alcohol (PVA) fabricate novel self-suspension function. PVA coating layer on ceramic achieves ability. In well, film melted fracturing fluid CQDs were released as for downhole monitoring. surface adhesion force PVA-CQDs 2 times larger than that ordinary proppants, liquid conductivity (SSTP) can reach 51 D cm, which 22.45% higher original at closure pressure 40 MPa. This work combined dot obtained new type function, has promising significance improve conducting cross-well