摘要
元48长_(4+5)油藏位于陕北斜坡中北部的姬塬东斜坡,主要为三角洲前缘水下分流河道沉积,粉细-细粒岩屑质长石砂岩,属于特低渗构造-岩性油藏。油藏地层水水型为氯化钙水型,与注入水配伍性较差,油井见水后在近并地带发生堵塞,造成油井油量下降,含水上升。主要对油藏见水机理进行分析,并分析了酸化解堵技术在实际应用中的效果。
The yuan 48 Creservoir is located in Jiyuan east slopes of the northern shanxi slopes, mainly for underwater delta front distributary channel deposition, belong to ultra-low permeability structure - lithologic reservoir. When the injected water is not compatible with the C4＋5 reservoir which the water is CaCl2,the oil well plugging occurs. This paper mainly elaborates the diagnosis of reasons for oil well plugging and the application of acidizing plugging removal technique in Triassic C4＋5 reservoir.
出处
《石油化工应用》
CAS
2010年第1期47-48,53,共3页
Petrochemical Industry Application
关键词
鄂尔多斯盆地
特低渗油藏
酸化解堵
压力保持水平
ordos basin
ultra-low permeability reservoir
acidizing plugging removal
press ure level
