Greater Clair 是欧洲最大的油田，拥有两个现有平台：Clair 一期和 Clair Ridge，正在生产中，并有可能建立第三个平台，目标是一期以南未开发的 Lower Clair 群 (LCG)。然而，基质质量低和缺乏天然裂缝是主要特征，导致生产率较低。作者写道，压裂技术为解锁较贫困的一期和山脊库区带来了机会。
水库描述。Clair 油田位于法罗-设得兰盆地外延的英国大陆架设得兰群岛以西 75 公里处。
老红砂岩储层分为两个岩石地层单元：上层和LCG。LCG 蕴藏着大部分石油，是 Clair 开发的基础。该储层具有相、渗透率变化大的特点。
根据沉积相和重矿物组合的变化，LCG 被细分为 I 至 VI 六个单元。开发钻探优先针对 V 和 III 单元中最高质量的储层。LCG 被定义为具有可变裂缝分布的双渗透系统。
Greater Clair, Europe’s largest oil field, has two existing platforms, Clair Phase 1 and Clair Ridge, on production with the potential for a third platform targeting the undeveloped Lower Clair Group (LCG) to the South of Phase 1. In some areas, however, low matrix quality and lack of natural fractures were the dominant characteristics, resulting in lower production rates. The authors write that fracturing technology brings opportunities to unlock poorer Phase 1 and Ridge reservoir areas.
Reservoir Description. The Clair field is 75 km west of the Shetland Islands on the UK Continental Shelf within the extensional Faroe-Shetland Basin.
The Old Red Sandstone reservoir is divided into two lithostratigraphic units, the Upper and LCG. The LCG contains the bulk of the oil in place and underpins the Clair development. The reservoir is characterized by large variations in facies and permeabilities.
The LCG is subdivided into six units, I through VI, based on variations in sedimentary facies and heavy mineral assemblages. Development drilling preferentially targets the highest quality reservoirs in Units V and III. The LCG is defined as a dual-permeability system with a variable fracture distribution.
