A区西斜坡P油层成藏分析及增储区域划定

Reservoir Forming Analysis of P Reservoir and Delineation of Storage Area in A Southwest Slope Zone

大庆长垣主体区块现已进入开发后期,有高含水和高采出程度的特点,其剩余油呈高度分散状态,调整挖潜难度逐渐增大。为划定长垣A区西斜坡P油层增储区域,利用测井-地震联合构造解释、储层预测及油水识别等方法,开展成藏构造、储层、油水分布研究。研究表明,P油层油水平面分布受构造单元控制,垂向油藏类型受沉积演化特征控制,油富集程度受断层封闭性控制,油气成藏难易由断裂与砂体配置关系决定。根据研究成果,在西斜坡P油层划定I、Ⅱ和Ⅲ潜力区。

At present, the main block of Changyuan in Daqing has entered the late period of development, with the characteristics of high water cut and high extraction degree. The remaining oil is highly dispersed, and the difficulty of adjusting the potential of tapping the potential is gradually increasing. In order to delineate the P reservoir area of the south west slope of A zone, the reservoir structure, reservoir and oil and water distribution are studied by means of logging seismic joint tectonic interpretation, reservoir prediction and oil and water identification. The research shows that the horizontal surface distribution of P oil reservoir is controlled by structural units, the type of vertical reservoir is controlled by the characteristics of sedimentary evolution, oil enrichment is controlled by fault sealing, and oil and gas accumulation is difficult to be determined by the relationship between fracture and sand body configuration. According to the research results, the potential area of I,Ⅱ and Ⅲ is delineated in the P oil layer of the west slope, and the total geological reserves are obtained.