Study On Optimizing The Fiber-particle Composite Temporary Plugging And Diverting Technique

With the exploration of oil and gas resources,new technology is required to produce from the undeveloped reserves.Deep and low-permeability reservoirs have become the focus of attention during the recent years.Using fiber-particle composite temporary plugging and diverting technique,people can achieve separate layer treatment of the formation.This technique can create a complex network and thus effectively stimulate the deep and low-permeability reservoirs.However,systematic study on this technique has not been conducted yet,and its application still rely on human experience,e.g.,the choice of the formulas and amounts of the temporary diverting agents.Therefore,it is necessary to understand the mechanism behind this technique,and to develop an optimization method to enhance the efficiency of using the temporary plugging agents.To achieve this goal,an experimental platform was designed in this study to simulate the in-situ plugging of the fracture.The plugging ability of different temporary plugging and diverting agents were then evaluated and compared using this platform.Using the platform mentioned above,the formulas of the temporary plugging agents in different fracture widths were evaluated.Results show that the higher the fiber concentration,the faster the sealing speed and the better the temporary plugging effect.If the concentration of the particle is too high,the sealing speed may be slowed down,and the temporary plugging effect also turns worse.The impacts of different plugging agents in formation of plugging were compared using orthogonal experiment,thus the optimal temporary plugging agent formula under different conditions can be discovered.Combining with the field application experience,this study provides new ideas for using this technique in deep and low-permeability reservoirs both effectively and efficiently.