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位于阿拉斯加北部斜坡的库帕鲁克河(Kuparuk)油田是美国最大的油田之一,日产油近30×10~4bbl。刚开发时是在160英亩区域内布置了350口生产井、270口注水井。在Kuparuk砂岩油层开采的两个油层分别叫A和C砂岩油层。为能对A层采取增产措施,分层注水和分隔高产C层,采用了“选择性单层”完井方法。油田自1983年注水后,C层的油井含水量迅速上升。去年,氧气活化测井已成功地应用在注水和生产井上,为鉴别油管下面的高渗透层和更好地运用注水程序提供了重要的资料。采用氧气活化新方法,即水流测井设施(WFL)为跟踪流量在广泛范围内变化的水流提供了能力。这种方法特别适用于测量油管套管环空内的水流。用一系列的测点数据,在日产水高达4000bbl水的流量下,能测量高达200ft/min(1m/s)的水流速度。该测量方法提供了能够确定注水过程垂向波及范围的注水剖面。用该测量方法还可以记录下几口井的油层产水剖面,在有利的情况下,它可以跟踪两个流动方向相同且被油管分开的平行流动的水流。氧化活化测量法为注水动态评价,最终采收率评价,加密钻井的评价和改善油田开采方法提供了重要的数据。井下作业方面的受益是取消了所需要的放射性示踪剂材料。
The Kuparuk field, located on the northern slopes of Alaska, is one of the largest in the United States with a daily oil production of nearly 30 × 10 -4 bbl. At the time of development, 350 production wells and 270 injection wells were deployed in the 160-acre area. The two reservoirs mined in the Kuparuk sandstone are A and C sandstone reservoirs, respectively. In order to take stimulation of layer A, stratified water injection and separation of high-yield C-layer, a “selective single-layer” completion method was adopted. Oilfield water injection since 1983, the C-layer well water content increased rapidly. Last year, oxygen-activated logging has been successfully used in water injection and production wells to provide important information for identifying high permeability formations beneath tubing and for better application of water injection procedures. The new approach to oxygen activation, the Water Flow Logging Facility (WFL), provides the ability to track the flow of water over a wide range of changes. This method is particularly suitable for measuring the flow of tubing within the annulus. With a range of measuring point data, water flow rates up to 200 ft / min (1 m / s) can be measured at up to 4000 bbl of water per day. This measurement method provides a water injection profile that determines the vertical extent of the water injection. Using this measurement method, it is also possible to record the water production profile of several wells, and in the favorable case it can track two parallel flowing flows separated by tubing in the same direction. Oxidation activation measurements provide important data for dynamic evaluation of waterflooding, evaluation of final recovery, evaluation of infill drilling and methods for improving oilfield recovery. The benefit of downhole operations is the elimination of the required radiotracer material.