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英国大陆架 (UKCS)的油田所采出的石油大部分为轻质油 ,但也发现了几个重质油油田。本文所述的重质油油田是指原油粘度大于 5cP的油田。UKCS的大部分重质油油田都是在较浅的储集层中形成的 ,而这些储集层又都是由极好的水平渗透率 ( 30 0 0～ 1 0 0 0 0md)和垂直渗透率 (垂直 /水平渗透率比值为 0 2～ 1 0 )的高孔隙度疏松砂岩所组成的。通常 ,这些油层都位于水下 ,而有些油层还具有原生气顶。
Most of the oil from UKCS fields is light oil, but several heavy oil fields have also been discovered. The heavy oil fields described herein refer to fields with a crude oil viscosity greater than 5 cP. Most of the UKCS heavy oil fields are formed in shallower reservoirs, all of which are composed of superb horizontal permeability (30,000 to 100,000 md) and vertical infiltration Rate (vertical / horizontal permeability ratio of 0 2 ~ 1 0) composed of high porosity loose sandstone. Often, these reservoirs are located underwater, while some reservoirs also have primary gas heads.