Study On Diversion Capacity And Distribution Law Of Proppant In Interlaced Fractures

Volume fracture technology is an effective means for the oil field to increase harvesting.After the volume fracture,the underground reservoir produces complex interlaced fractures.Unlike a single fracture,the complex interlaced fracture has a large number of cracks and more complicated structures.Slick water fracture fluid has the characteristics of low viscosity,low motor resistance,and less strata damage.It is widely used.By injecting a slick water fracture fluid containing the supporting agent into the staggered seam network The transportation and distribution form determine the final pressure closed channel.Therefore,the research on the distribution rules and diversion capabilities of supporting agents in complex interlaced fractures provides theoretical guidance for volume fracture construction site.First of all,this article conducts experimental research on diversion capabilities through factors such as the type of proppant and the size of proppant through the crack diversion instrument.The experimental results show that the sewing network’s diversion capacity decreases with the increase in closed pressure,and the diversion capacity of the pottery support agent under the same closed pressure is higher than the quartz sand support agent.And the large-scale support agent has stronger diversion capabilities.Secondly,Study on the research on the subtraction mechanism of supporting particles in Newtonian fluids and Non-Newtonian fluids.According to the theoretical formula,the speed of particle sedimentation is mainly related to the size of the support agent and the viscosity of the fracture fluid.So carry out support agent settlement experiments,establish visualized cross-sewing network experimental devices,and study the injecting displacement,particle size and fracture viscosity.Finally,for the distribution rules of the support agent,the same influencing factors simulation research is carried out through FLUENT numerical simulation software.The numerical simulation and physical experiments are the same,and the feasibility and accuracy of the numerical simulation parameters is verified.On this basis,the rice-shaped and well-shaped staggered sewing model is established to carry out numerical simulation research on different influencing factors.The numerical simulation results show that the height of the main crack sand embankment is negatively correlated with the injection speed and the viscosity of the fracture fluid,which is positively correlated with the support agent particle size.The viscosity is negative,and the distribution of the sandy embankment of the second-fracture branched crack determines the sandy embankment distribution form of the third-fracture crack.You can carry more proppants to a farther staggered and complicated interlaced fractures.