Research and application of deep shale reservoir diversion fracturing with temporary plugging materials
The development of shale gas in China has gradually shifted to deep and ultra-deep reservoirs,which puts forward higher requirements for the temperature resistance and differential pressure resistance of temporary plugging materials.A kind of temporary plugging material which is resistant to high temperature,large pressure difference and easy degrada-tion was developed.The experimental results showed that the rigid group N-vinylpyrroli-done(NVP)and polyacrylate are introduced into the polyacrylamide molecular chain,when the molar ratio of NVP∶DPHA∶AM=1∶1∶100,the product had good water absorption expan-sion and degradation proper ties.Temperature resistance was 150℃,differential pressure resistance was 40 MPa and the degradation time was less than 8.5 h.Field test results showed that the compound temporary plugging method can increase the construction pressure of 3.5～5.6 MPa and improve the complexity of artificial fracture.
deep layershale reservoirtemporary pluggingtemperature resistancepressure resistancedegradable
万方数据
维普
