Equinor 及其合作伙伴在北海 Gudrun 油田的 15/3-13 S 和 15/3-13 A 探井中发现了油气。

这些是生产许可证 025 中的 13 号和 14 号勘探井。钻探由 Deepsea Stavanger 钻井平台进行。

初步估计，Draupne 组内发现的可采油当量规模在 0.1 至 120 万标准立方米 (Sm3) 之间，Hugin 组内发现的可采油当量规模在 0.4 至 130 万标准立方米 (Sm3) 之间。

许可证持有者将根据该地区的其他勘探前景来评估油井的结果。

地质信息

该井的主要勘探目标是证明 Draupne 组内晚侏罗世储层以及 Hugin 组的中侏罗世储层中的石油。

次要勘探目标是探明Ródby组早白垩世储层中的储层。

15/3-13 S 井在 Draupne 组内遇到薄含油砂岩层。未遇到油水接触面。在 Hugin 组，该井共遇到 92 米砂岩，储层性质较差。

在两个层段遇到天然气，厚度分别为 8 米和 7 米。未遇到气水接触面。

钻探了一条侧钻井 15/3-13 A，目的是圈定发现范围。15

/3-13 A 在 Draupne 组内 85 米厚的层段遇到石油，其中共 13 米为间歇性砂岩层，储层质量中等。油水接触面被证实位于海平面以下 4328 米处。

15/3-13 A 还证实了 Hugin 组约 100 米的砂岩储层性质较差。整个层段都是含水层，没有证实气水接触。

在次要勘探目标，即下白垩纪 Ródby 组，没有发现储层。

这些井没有进行地层测试，但进行了广泛的数据采集和采样。15

/3-13 S 井的测量深度和垂直深度分别为海平面以下 4826 米和 4740 米。15/3-13 A 井的测量深度和垂直深度分别为海平面以下 4900 米和 4814 米。这两口井的终点都在中侏罗纪的 Sleipner 组。

水深为 110 米，这些井已被永久封堵并废弃。

Equinor and its partners have made an oil and gas discovery in wildcat wells 15/3-13 S and 15/3-13 A on the Gudrun field in the North Sea.

These were exploration wells number 13 and 14 in production licence 025. The drilling was carried out with the Deepsea Stavanger rig.

Preliminary estimates place the size of the discovery between 0.1 and 1.2 million standard cubic metres (Sm3) of recoverable oil equivalent in the intra-Draupne Formation, and between 0.4 and 1.3 million standard cubic metres (Sm3) of recoverable oil equivalent in the Hugin Formation.

The licensees will assess the well results in light of other prospectivity in the area.

Geological information

The well's primary exploration target was to prove petroleum in Late Jurassic reservoir rocks in the intra-Draupne Formation, as well as Middle Jurassic reservoir rocks in the Hugin Formation.

The secondary exploration target was to prove reservoir in Early Cretaceous reservoir rocks in the Rødby Formation.

Well 15/3-13 S encountered thin oil-bearing sandstone layers in the intra-Draupne Formation. The oil/water contact was not encountered. In the Hugin Formation, the well encountered a total of 92 metres of sandstone with poor reservoir properties.

Gas was encountered in two intervals, with respective thicknesses of 8 and 7 metres. The gas/water contact was not encountered.

A sidetrack, 15/3-13 A, was drilled with the objective of delineating the discovery.

15/3-13 A encountered oil in an 85-metre thick interval in the intra-Draupne Formation, a total of 13 metres of which were intermittent sandstone layers with moderate reservoir quality. The oil/water contact was proven 4328 metres below sea level.

15/3-13 A also proved about 100 metres of sandstone with poor reservoir properties in the Hugin Formation. The entire interval was aquiferous, and no gas/water contact was proven.

No reservoir was encountered in the secondary exploration target, the Rødby Formation in the Lower Cretaceous.

The wells were not formation-tested, but extensive data acquisition and sampling were carried out.

Well 15/3-13 S was drilled to respective measured and vertical depths of 4826 metres and 4740 metres below sea level. Well 15/3-13 A was drilled to respective measured and vertical depths of 4900 metres and 4814 metres below sea level. Both wells were terminated in the Sleipner Formation in the Middle Jurassic.

The water depth is 110 metres, and the wells have been permanently plugged and abandoned.