福山油田流一段精细分层注水工艺技术研究

Study on the Technical of Fine Separate Injection in L1 Segment of Fushan Oilfield

福山油田流一段受油层埋藏深、井斜大、水质差、腐蚀结垢严重、层间矛盾突出等客观因素制约,常规分注技术存在投捞测配遇阻、测调效率不高、管柱有效期短等问题。优选出适用于不同油藏特征的同心双管、桥式偏心、桥式同心3种主要精细分注技术。对配套的封隔器洗井通道进行改进,可避免固相颗粒进入洗井通道,造成封隔器失效,提高了其在福山油田的技术适应性。同时对分注工艺管柱配套的水井双向锚的承载性能进行模拟计算,在管柱蠕动载荷作用下,水井双向锚轴向最大位移为0.02mm,能够满足工程要求。

For the reason that L1 segment of Fushan oilfield had great reservoir depth,high well deviation angle, poor water quality, serious scaling, corrosion and significant interlayer contradic- tion problems,the conventional stratified waterflooding technology often encountered some prob- lems, such as blocking during fishing test, low measuring efficiency and short effective period of the pipes. The Concentric dual-barrel, bridge eccentric and bridge concentric three main injection technology were optimized for applying to different reservoir. In order to avoid channel blockage, the well flushing channel of packer was improved,so the technical adaptability of the packer was enhanced. The load performance of bidirectional anchor in the separate injection tubular was simu- lated,and the result showed that maximum axial displacement was 0.02 mm within creep load of tubular which could meet the engineering requirements.