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    • 4. 发明申请
    • DOWNHOLE TOOL
    • 卧式工具
    • WO1997044567A1
    • 1997-11-27
    • PCT/GB1997001357
    • 1997-05-20
    • SCHLUMBERGER LIMITEDSCHLUMBERGER TECHNOLOGY B.V.SCHLUMBERGER CANADA LIMITEDSERVICES PETROLIERS SCHLUMBERGERLENN, Christopher, PeterROSCOE, Bradley, A.
    • SCHLUMBERGER LIMITEDSCHLUMBERGER TECHNOLOGY B.V.SCHLUMBERGER CANADA LIMITEDSERVICES PETROLIERS SCHLUMBERGER
    • E21B49/00
    • E21B47/1015
    • When an oil well has been completed it is necessary to monitor downhole the rate at which the well's products are flowing along the borehole and up to the surface. One type of method and apparatus previously proposed for this purpose in wells with a horizontal borehole section, where the fluid is stratified into distinct component layers, involves the use of tracer or maker materials; employing an injector/detector tool a suitable material is injected into the fluid, and its arrival time at a downstream detector station is noted, giving the flow velocity by a distance-over-time type calculation. The problem, however, is to get the tracer/marker material, in the form of a suitably soluble (or miscible) composition, into the well fluid in such a way that it ends up in the desired component layer; unfortunately, merely introducing the composition randomly into the fluid somewhere across the borehole is not satisfactory, for if injected into the "wrong" layer it is in practice difficult for the tracer composition to migrate to its intended target. The invention seeks to solve this problem by proposing the use of an injection apparatus that comprises a plurality of spaced ejection ports (22lp, 22r) (from which the relevant tracer composition can be ejected so as to be injected directly into the relevant chosen component layer), together with orientation means (15) whereby in use the orientation of the tool can be so adjusted that the ports are so disposed as concurrently to lie each within the appropriate layer. Each port is connectable to a source of the relevant tracer composition; most conveniently the source is the combination of a reservoir (13l, 13r) and a syringe-like device (12l, 12r) which can draw a suitable amount of the composition from the reservoir and then drive it to, and eject it from, the associated port into the chosen layer.
    • 当油井完成后,有必要监测井的产品沿钻孔流动到表面的速度。 以前为此目的在具有水平井眼部分的井中提出的一种类型的方法和装置,其中流体被分层成不同的部件层,涉及使用示踪剂或制造材料; 使用注射器/检测器工具,合适的材料被注入到流体中,并且注意到其在下游检测器站处的到达时间,给出流速通过距离 - 时间类型计算。 然而,该问题是以适当溶解(或可混溶)组合物的形式将示踪剂/标记材料以使其最终成为所需组分层的方式进入井液中; 不幸的是,仅仅将组合物随机地导入穿过钻孔的某处的流体是不令人满意的,因为如果注入到“错误”层中,示踪剂组合物实际上难以迁移到其预定目标。 本发明试图通过提出使用包括多个间隔开的喷射口(22lp,22r)的注射装置来解决这个问题(从中可以将相关的示踪剂组合物从中喷出,以便直接注入相关的选定的组分层 ),以及定位装置(15),由此在使用中可以调整工具的取向,使得端口同时布置成适合于各层。 每个端口可连接到相关示踪剂组合物的源; 最方便的是,源是储存器(13l,13r)和类似注射器的装置(12l,12r)的组合,其可以从储存器中吸取合适量的组合物,然后将其驱动并从其中排出 相关端口进入所选层。