High Pressure Water Injection Parameter Optimization Study Of Low Permeability Reservoirs

High pressure water injection of low permeability reservoirs is always an important measures of oilfield production,production,low permeability reservoir geological characteristics decided the way of water injection is a high pressure water injection in a way that must be taken.Investigate its reason,the first on the one hand is because of the low permeability of low permeability reservoirs,geological conditions are relatively poor,there is a start-up pressure;The second aspect,due to the formation of clay mineral expansion easily in water or reduce the permeability of reservoir mudstone creep on the casing extrusion,etc.,and threaten the normal safety production;The third aspect,in the process of reservoir development,due to the oil and gas drilling to the ground,formation energy is released in formation energy losses,so you need to by high pressure water injection can complement formation energy in a timely manner.At this stage mainly by high pressure water injection to increase recoverable reserves of reservoir and improve the recovery factor of low permeability reservoir,and improve the effect of water injection in reservoir.In this paper,in view of the development of water injection in low permeable oil fields in our country to explore in-depth water injection parameters.For water injection oilfield,good effect of water flooding is the foundation of the stable oil field production.Compared with high permeability reservoirs of low permeability reservoirs,however,low permeability of low permeability reservoirs,absorption is poor,easy to appear the phenomenon of water flooding effect is not ideal,can not effectively complement formation energy.Leading to poor reservoir development effect,reservoir recoverable reserves are low.Hole is very small pore system is remarkable characteristics of low permeability porous media.In order to improve the efficiency of the high pressure water injection,this paper USES the indoor experiment and research method of combining the theory,from the high pressure water injection water quality of high pressure water injection pressure and the parameters of the two aspects of detailed research,has formed a set of low permeability reservoir of high pressure water injection parameter optimization method research,in order to improve the level of high pressure water injection,well provide reference basis for high pressure water injection of low permeability reservoirs.In the low permeability reservoir development,there are a lot of reservoir formation energy is insufficient,only by means of high pressure water injection can good complement formation energy,let formation fully absorb moisture,to get enough energy development.We are in the process of water injection,however,will encounter many problems,for instance,injection water quality problems,mudstone creep influence on casing,and should keep injection pressure within the scope of what can best protect casing,etc.This article mainly from the geological conditions of high pressure water injection of low permeability reservoirs,to start with,combined with the geological characteristics of tuha oil field W area for research.Analyzed the low permeability reservoir of high pressure water injection injection parameter optimization problems,this paper chose the high pressure water injection in the comparative analysis of several important parameters,mainly from the low permeability reservoir injection water quality and the reasonable injection pressure of the two main parameters is studied.According to the reasonable injection pressure and injection water quality parameters optimization research results and calculation method,compiled the related to the low permeability reservoir with high pressure water injection parameter optimization design calculation software.Software is mainly divided into two parts,the first part is the optimization of injection water suspended solid solution concentration,the second part is the reasonable pressure calculation.Because of the limitation of the various aspects is summarized in this chapter and the design of high pressure water injection in several common parameters optimization calculation,are not all the research designs a complete set of software.