Applicability Of Sand Control Method For Deep-water Reservoir Fracturing And Filling

In recent years,the deepwater field has become one of the hot spots in oil and gas exploration and development in the world.However,due to the special geological environment and marine environment of deep-water reservoirs,the reservoirs often have the characteristics of "high porosity and high permeability,poor cementation",etc.,and sand production has become a common problem in the development of deep-water reservoirs.For completion of deep-water oil and gas wells,sand production prediction and optimization of sand control methods have become the top priority of completion work.At present,the mechanical sand control method is still the main means of sand control for offshore completions,but due to its own defects,the mechanical sand control method is not the most reasonable sand control method for deep-water reservoirs.The fracturing filling sand control method has the dual purpose of increasing production and sand control,and its application effect is better than the mechanical sand control method.It has been widely used in offshore sand control and completion.However,reservoir permeability,in-situ stress conditions,and rock strength all have important effects on the fracturing and filling effect.Therefore,the suitability of the fracturing filling sand control method for deep water high permeability reservoirs needs further study.In order to understand the influence of different reservoir conditions on the sand control effect of deep-water reservoir fracturing and filling,to achieve precise management and effective development of deep-water reservoirs,and to ensure the increase in production of medium-and high-permeability deep-water reservoirs.This article focuses on the suitability research of sand control methods for deep-water reservoir fracturing filling,closely following the characteristics of sand control and completion of deep-water oil and gas wells,and solves the problem of sand production in deep-water oil wells according to the sequence of sand production prediction,sand control methods,and fracturing filling suitability research.Various methods of analysis.Based on the linear fracturing filling fluid loss model,a finite element model of fracture expansion for deep water loose sandstone reservoirs was established to quantify the fluid loss behavior of the fracturing fluid during the fracturing process,and to analyze reservoir permeability,in-situ stress conditions and rock The effect of strength on the filling effect of fracturing.The calculation results show that the reservoir permeability is negatively correlated with the fracturing packing effect.The greater the reservoir permeability,the worse the fracturing packing effect.In the case of medium and high permeability,the reservoir permeability change has a greater impact on the fracture initiation length;In the case of ultra-high permeability,the influence of reservoir permeability changes on fracture initiation length is significantly weakened;the more uniform the in-situ stress conditions,the longer the fracture initiation length and the better the fracturing filling effect;the greater the rock strength of the reservoir,The longer the fracture initiation length will be,the better the fracturing and filling effect will be;for high-permeability reservoirs in deep water,uniform in-situ stress conditions and large reservoir rock strength will enable oil and gas wells to obtain better fracturing and packing effect...