The Study On Exploitation Performance And Adjusting Techniques Of Fractured Low Permeability Reservoir In Xin Zhan Oilfield

Naturally fractured low permeable reservoirs distribute widely all over the world, which are of great economical and strategic potential.In china, fractured reservoirs also possess importance role in oil-gas exploitation and production.However, many problems and contradictions expose during the course of routine waterflood, such as water cut going up, production decline, casing damage violence, the strata pressure going down quickly, the difficulty in building up effective extruding pressure gap etc.These problems and contradictions have limited and affected the development effect and economic benefit of oilfield, researches on the fluid flow and development adjustment of this kind of reservoirs have great significance to oil field production and scientific research.How to know and adapt to the fracture characteristics and grasp the movement regularity of oil-water, how to dispose well networks and avoid water breakthrough are the keys to improve the development effects of this kind of reservoir.In order to develop the fractured permeable reservoirs effectively, it is essential to grope for the development techniques applicable to such oilfield.Xin zhan oilfield of fractured permeability have been taken as the studying and testing object, it starts from the reservoir geology features and cause of formation, based on the study on the condition of reservoir fractures and the relationship between it and the ancient and modern stress field, according to the development theory of the low permeable reservoir, the measure of office study and field experiment have been taken to study and discuss the development techniques and methods.At the same time, the dynamic characters of the fractured low-permeability reservoir have been researched systemically, and provide the method of defining threshold pressure gradient using the dynamic character.Research and treat have been mainly done to choose rational well spacing and well line and sequent infill development programme.Numerical simulation and study of the development projects have been proceeded in the real reservoir, and elementary understanding and conclusion have been acquired, which provide important theoretical reference for deployment and implementation of future development program in Xin zhan oilfield.