Study On Reservoir Development Countermeasures Of Xiyaogou Oil Region Of Qilicun Oilfield

Xiyaogou block of Qilicun oilfield like most oilfields in China.Waterflooding approach was adopted for the enhanced oil recovery.The study area has received good outcome,as the result of water injection to enhance / maintain and minimize depletion in the production from the existing wells.However,there are still some problems in the current development that need to be solved.The serious water channeling of the oil well is caused by large water injection pressure in some wells.The rate of water content of some well rises obviously.The injection well pattern not suited to fracture azimuth,injection-production system is imperfect,delayed water injection,and so on.This paper is aimed at the problems in the development of the research area,through analyse the reservoir geological characteristics,water injection analysis evaluation of water injection development effect,demonstration of petroleum reservoir engineering.Research shows that the main problems in the production of this area are as follows.The well pattern is irregular,the well pattern density is large,and the direction of injection wells in production is different from the direction of reasonable injection wells.Many wells have no water flooding response.Imperfect net structure of production-injection wells and low water flooding control degree,low levels of water driving,hard to maintain formation pressure,insufficient formation energy and oil wells production declined fast,less water intake interval and so on.To solve the above problems,in consideration of the actual situation,the paper gives a specific development strategy focusing on completing injection-production pattern,adjusting the corresponding relationship between injection and production,adjusting injection-production parameter,adjusting the wells with rising water content and controlling the quality of injected water.This paper grasps the characteristics of the reservoir,compiles a scientific and rational development countermeasures,reduces the decline in production,and the rising trend of water cut in oil well is obviously better.Finally,the Xiyaogou block of Qilicun oilfield can achieves a efficient and reasonable development.