Equinor 及其合作伙伴 Wintershall Dea 和 Petoro 将考虑将其在挪威海的 Obelix Upflank 天然气发现与 23 公里外的 Irpa 海底开发项目联系起来。

Equinor 宣布了这一商业发现，这是 2023 年在挪威大陆架上的首次发现，估计蕴藏着 2 Bcm 至 11 Bcm 的可采天然气。

Equinor 北部勘探和生产高级副总裁 Grete B. Haaland 在一份新闻稿中表示，Equinor 及其合作伙伴将考虑将 Obelix Upflank 发现与 Irpa 联系起来。

Obelix Upflank 发现区水深 1,190 m，位于 Irpa 天然气发现区以南 23 处，位于 Aasta Hansteen 平台以西约 80 公里处。Equinor 于 2022 年 11 月提交了 Irpa（以前称为 Asterix）的开发和运营计划 (PDO)。PDO 要求在 1,350 m 水深处开发 Irpa，其中包括三口井和一条通往 Aasta Hansteen 的 80 公里海底回接线。Equinor 表示，Irpa 项目将使 Aasta Hansteen 的产量延长七年至 2039 年。

Deepsea Stavanger 钻井平台在 1128 号生产许可证中钻探了 6605/1-2 S 预探井和 6605/1-2 A 评价井。这是 Equinor 运营的 PL 1128 井自 2020 年荣获 2020 年奖项以来钻探的第一口井。预定义区域（APA）回合。

据挪威石油管理局 (NPD) 称，6605/1-2 S 井钻探至海平面以下垂直深度 3,330 m，目的是探明上白垩统 Springar 组储层岩石中的石油。6605/1-2 S 井钻遇 Springar 组 3 层砂岩，储层质量中等至良好。最上面的砂岩层厚约10 m，含气。在35米的中砂岩层中，遇到了2米的气柱，并在海平面以下约3190米处证实了气/水接触。最底层砂岩层厚25 m，含水。 

NPD 表示，6605/1-2 A 评价井钻探至海平面以下垂直深度 3,327 m，目的是确认邻近断层段的发现。6605/1-2A井在最上部砂岩层探明了12米气柱，储层质量为中等到良好。没有遇到气体或水接触。较深的砂岩层含水。

NPD 表示，压力数据表明，在水区和碳氢化合物区，三个砂岩层之间存在垂直连通，两口井之间存在水平连通。两口井探明气柱总长29 m。这些井未经地层测试，均已被永久堵塞并废弃。

Equinor 代表合作伙伴 Wintershall Dea（持有 20%）和 Petoro（持有 20%）经营 PL 1128，持有 60% 的权益。

Equinor and its partners, Wintershall Dea and Petoro, will consider tying back its Obelix Upflank gas discovery in the Norwegian Sea to the Irpa subsea development 23 km away.

Equinor announced the commercial discovery – the first find of 2023 on the Norwegian Continental Shelf – holds an estimated 2 Bcm to 11 Bcm of recoverable gas.

Grete B. Haaland, Equinor’s senior vice president for Exploration and Production North, said in a press release that Equinor and its partners would consider tying back the Obelix Upflank discovery to Irpa.

The Obelix Upflank find in 1,190 m water depth is 23 south of the Irpa gas discovery, which is about 80 km west of the Aasta Hansteen platform. Equinor submitted a plan of development and operation (PDO) for Irpa, formerly known as Asterix, in November 2022. The PDO calls for developing Irpa in 1,350 m water depth with three wells and an 80-km subsea tieback to Aasta Hansteen. The Irpa project will extend production at Aasta Hansteen by seven years to 2039, Equinor said.

The Deepsea Stavanger rig drilled the 6605/1-2 S wildcat well and 6605/1-2 A appraisal well in Production License 1128. They are the first wells drilled in Equinor’s operated PL 1128 since they were awarded in the 2020 awards in predefined areas (APA) round.

The objective of well 6605/1-2 S, drilled to 3,330 m vertical depth below sea level, was to prove petroleum in Upper Cretaceous reservoir rocks in the Springar Formation, according to the Norwegian Petroleum Directorate (NPD). Well 6605/1-2 S encountered three sandstone layers in the Springar Formation, with moderate to good reservoir quality. The uppermost sandstone layer, about 10 m thick, was gas-bearing. In the 35-m middle sandstone layer, a 2-m gas column was encountered, and the gas/water contact was proven at about 3,190 m below sea level. The lowest sandstone layer was 25 m thick and water-bearing. 

The objective of appraisal well 6605/1-2 A, drilled to 3,327 m vertical depth below sea level, was to confirm the discovery in a downfaulted neighboring segment, the NPD said. Well 6605/1-2 A proved a 12-m gas column in the uppermost sandstone layer, with moderate to good reservoir quality. No gas or water contact was encountered. The deeper sandstone layers are water-bearing.

The NPD said pressure data indicated communication vertically between the three sandstone layers and horizontally between the two wells, in both the water and hydrocarbon zones. The total gas column proven in the two wells amounts to 29 m. The wells were not formation-tested, and both have been permanently plugged and abandoned.

Equinor operates PL 1128 with 60% interest on behalf of partners Wintershall Dea with 20% and Petoro with 20%.