The Study Of Fracture Characters And Administer Measures On Chang4+5Reservoir In Baiyushan Area Of Jiang’an Oil Field

In this paper, based on basic geological study, an amount of cores and core wafer fracture observations, we have made a detailed study on fracture distribution features and the factors influenced the fractures of chang4+5reservoir in Baiyushan Area of Jing’an oil field, according to development performence analysis and application of interwell tracer test, waterflood front monitoring, interference test methods. Reservior engineering was used to study the reservoir’s development characteristics and the waterflooding detrimental effect which have been caused by the fractures. There was comparision between the appropriate producing technique and tactics studied by the reservior engineering methods and producing technology policies of current development phase. Relevant integrated administer measures were presented according to the appropriate producing technique and tactics. In the course of study, there are a large amount of high-angle and vertical natural fractures, a small amount of bias natural fractures in chang4+5reservoir. Fractures distribute in varied direction and fractures in east-west direction take the first place, fractures in NE45°direction take the second place. Natural fractures are controlled by the lithology and the depth of stratum. Man-made fractures are controlled by the natural fractures and nowaday stress field. Fractures of reservior cause containing water ascension, decline of production, interlamination and surface contradiction, etc. On basis of appropriate producing technique and tactics, integrated administer measures included water well flooding adjustment, area profile modifacation and acid broken down were maded. Those study conclusions are significant and great valuable to improve the reservior development performance and maintain the sustainable stabilization of oil production for chang4+5reservoir in Baiyushan Area of Jing’an oil field.