Visualization Of The Research And Development And Experimental Law Of The Variable Angle Mesh Proppant Placement Device

Stimulated reservoir volume fracturing, in inconventional gas and tight oil development, is a key technology. This technology take the important position in unconventional gas and tight oil development. Meanwhile, during the SRV, proppants transport in complex fracture networks,which is the most important for this technology. Injecting low viscosity sand-laden fluid of high flow rate, it can forms complex fracture networks. Therefore, placement of proppants deep into the complex fracture networks brings a conductive path for production enhancement and reduces flowing resistance when fluid flowing form rock matrix to wellbore. Currently, it is still unclear that sand features of low viscosity sand-laden fluid of high flow rate, and especially for proppants transport in subsidiary fractures are also not clearly understand. In this study, we fully think about the practical condition of engineering. Thus, in terms of similarity criterion of geometry and Reynolds number, we build a large scale of proppants placement in visualization complex fracture networks device which can changes angles of fractures and numbers of fractures. Due to the single factors experiment, this paper will discuss a series tests to evaluate proppants transport in complex fracture networks. Different slick water treatment tests are simulated by pumping sand slurry through the visualization complex fracture networks device while varying parameters of perforation, numbers of fractures, angles of fractures, proppants size, pump rate and proppants concentration. From the experiment, treatment tests which are used in variable factors can obtain different laws about traction carpet feature, traction carpet areas, balance hight and balance time in complex fracture networks. This paper also describes a 3-D physical model. This model is designed by SolidWorks software and using grid software to make complex fracture grids. Afterwards, using fluent software to simulate proppants velocity and concentration distribution field in the model of complex fracture networks. In addition, comparing the results between physical model and numerical model, the results can reveal, during the process of SRV, the law of proppants placement in complex fracture networks and serve as guidelines for engineering design.