孤岛油田荧光示踪剂井间监测试验

选择特征波长为450nm的荧光物质作为示踪剂来寻找油水井间的窜流通道,通过静态吸附试验计算出荧光示踪剂在岩石中的吸附损失量和估算试验区块地下水体体积,从而计算出注水井所需的示踪剂用量。现场试验注入267m3浓度为15mg/L的荧光示踪剂溶液,历时40h,从15N9注水井注入后,在对应的14口生产井上取水样进行检测,结果表明其中4口井间存在高渗透带或窜流通道。在15N9井调剖后,注水压力由6.0MPa上升到12.5MPa,对应生产井平均单井日增油3.5t,含水下降9.55%。

Monitoring test of interwell fluorescent tracer

Fluorescent material with characteristic wave-length of 450 nm is used as tracer to look for the flee-flowing channel between production wells and injection wells.The quantity of tracers can be calculated by static adsorption experiments and the estimation of the groundwater volume in test area.The 267 m3 solution with the fluorescence tracer concentration of 15 mg/L was injected to 15N9 well,and the time of injection was 40 hours.The water sample from the corresponding 14 production wells was checked.The result showed that high permeable zone or flee-flowing channel existed in 4 production wells.The initial injection pressure of 15N9 well is 6.0 MPa,and after profile control it can reach to 12.5 MPa.The extra oil production of the corresponding production wells can be 3.5 t for a single well everyday,and the water content ratio decreased by 9.55%.