The Captain Field, Block 13/22a, UK North Sea

Biological memoirs Pub Date : 2020-10-30 DOI:10.1144/M52-2018-92

B. Hodgins, D. J. Moy, P. A. Carnicero

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Abstract

Abstract The Captain Field in Block 13/22a is in the Moray Firth region of the UK North Sea. The primary reservoirs are Lower Cretaceous turbidite sandstones of the Captain Sandstone Member. Upper Jurassic shallower-marine Heather Formation sandstones of Oxfordian age provide a secondary reservoir. Total oil in place exceeds 1 Bbbl; however, the oil is heavy and viscous, requiring the continuous application of innovative technologies to maximize economic recovery from the field. Captain has been producing since 1997, with reservoir waterflood planned from the outset. Captain has been developed using long horizontal producers to maximize reservoir contact. Water injectors provide pressure support, with the aim of full voidage replacement. The Captain development has been phased with facilities consisting of two bridge-linked platforms, a floating production, storage and offloading vessel, and two subsea manifolds. Peak oil rate (100 000 boepd) was achieved in 2002. Average production in 2019 was 28 000 boepd. Captain is executing a chemical enhanced oil recovery (EOR) project, a first for the UK North Sea. Conventional waterflood yields an estimated ultimate recovery of 30–40%. Chemical EOR is expected to improve this by 5–20% in areas of the reservoir under polymer flood.

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英国北海13/22a区块Captain Field

13/22a区块的Captain油田位于英国北海的Moray Firth地区。主要储层为船长砂岩段下白垩统浊积砂岩。牛津时代的上侏罗统浅海石南组砂岩为次生储集层。总产油量超过10亿桶;然而，该油田的稠油和粘稠度较高，需要不断应用创新技术来最大限度地提高油田的经济采收率。Captain自1997年开始生产，从一开始就计划了油藏注水。Captain的开发采用了长水平井，以最大限度地扩大油藏接触面积。注水器提供压力支撑，目的是实现全压力替换。Captain的开发已经分阶段进行，其设施包括两个桥式连接平台、一艘浮式生产、储存和卸载船以及两个水下歧管。2002年达到峰值产油量(10万桶/天)。2019年的平均产量为2.8万桶/天。Captain正在实施一项化学提高采收率(EOR)项目，这是英国北海的第一个项目。据估计，常规注水的最终采收率为30-40%。在聚合物驱油藏区域，化学提高采收率有望提高5-20%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Biological memoirs

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