Based On The Fractal Theory To Research The Relationship Between Fracturing Fluid Characteristics And Flow

As the fracturing technology has been developing,fracturing fluid has become the exceedingly vital component of fracturing project and the clean fracturing fluid has gradually been widely used in fracturing fluid field.The clean fracturing fluid is a new type of fracturing fluid with viscoelasticity.The fracturing fluid has little damage to the reservoir and it is easy to prepare and low in cost.However,the research on the flow law of clean fracturing fluid in fracturing process is mainly based on laboratory test method.Few people have applied theoretical model to study the flow law of fracturing fluid in fracture.In order to better study the viscoelastic flow characteristics of fracturing fluid in fractures,the theory of fractional calculus is introduced,flow law of clean fracturing fluid of reservoir fractures from the angle of theory is more accurate in viscoelastic simulation,and the use of Fluent UDF method for flow of fracturing fluid,fracturing fluid flow law the crack was determined through simulation,but also verify the correctness of the mathematical model,which provides a new research method for the study of fracturing fluid flow.Up to all,the main researches of this paper are as followings:1.Development tendency and application of fracturing fluid of overseas and domestic research are investigated.The nature and the difference of the viscoelastic fluid model are discussed.The fluid type of the viscoelastic fracturing fluid is determined as the Oldroyd-B type fluid.The introduction of the fractional theory is the research direction and the research idea for the follow and laying a foundation for the study of fracturing fluid flow in fractures.2.The fractal calculus method is used to deduce the relation of the velocity of fracturing fluid and shear stress.The velocity of fracturing fluid and the variation of shear stress over time were determined.The correctness of the theoretical model is determined by the example.3.In order to describe the flow law of viscoelastic fracturing fluid in the crack more accurately,the numerical simulation method of Fluent UDF method is used to verify it.By analyzing the simulation results,the simulation results are consistent with the theoretical calculation At the same time,the feasibility of the mathematical model is verified by simulation.The research of this paper provides a new research method for the future study of the flow of fracturing fluid.