2024 年 12 月 4 日，ADX Energy Ltd 报告了对 Welchau-1 发现井 Reifling 地层上部进行流动测试的初步结果。Welchau-1 井位于上奥地利州的 ADX-AT-II 许可证内。ADX 持有 Welchau 投资区 75% 的经济利益，该投资区包含 Welchau 发现和北钙质阿尔卑斯山的其他新兴前景（参见图 1）。

背景
Reifling 地层的上部已穿孔并进行了初始流动测试。初始流动测试没有导致足够的流量流入井筒，使储层流体无法进入油管柱并允许确定或取样 Reifling 储层流体成分。对

流入液的取样主要回收了修井液（盐水）和痕量的未知成分的黑色固体颗粒，这些颗粒可能会影响井流量。固体颗粒的成分正在专业实验室进行分析。

该井已关闭，作业钻机也已停工，将在 ADX Vienna Basin Fields 进行计划中的作业，直到 Welchau-1 提供进一步的样品分析和井数据。

前瞻性计划
井口压力记录设备将在井口安装适当精度的设备，以便记录由于井流入而产生的潜在压力积聚。如果观察到足够的流入，则将进行进一步采样，并使用钢丝绳擦拭井以降低静水压力并引发进一步流动。

如果碳氢化合物被回收，则计划在油藏酸化以克服井眼损坏并提高碳酸盐油藏的生产力后，恢复对最浅的 Reifling 地层的进一步测试。

在开展上述活动的同时，还将对 Steinalm 地层测试中回收的样本进行分析，以确定是否存在碳氢化合物，并确定 Reifling 地层流动测试中也遇到的黑色固体颗粒的成分和可能来源。

预计井压监测、取样和井液分析的结果将在新年年初公布，之后将决定是否进行进一步的增产和/或测试作业。

ADX Energy Ltd reported the initial results of flow testing of the upper part of the Reifling formation in the Welchau-1 discovery well on the 4th of December 2024. The Welchau-1 well is located in the ADX-AT-II licence in Upper Austria. ADX holds a 75% economic interest in the Welchau Investment Area which contains the Welchau discovery and other emerging prospects in the Northern Calcareous Alps (refer Figure 1).

Background
The upper part of the Reifling formation has been perforated and an initial flow test conducted. The initial flow test did not result in sufficient flow into the well bore for reservoir fluids to enter the tubing string and allow the Reifling reservoir fluid composition to be determined or sampled.

Sampling of the inflow has recovered primarily workover fluids (brine) and traces of black solid particles of unknown composition, which may be affecting well flow. The composition of the solid particles are being analysed at a specialist laboratory.

The well has been left shut in and the work over rig demobilised to undertake planned work at ADX Vienna Basin Fields until further sample analysis and well data become available from Welchau-1.

Forward Program
Well head pressure recording equipment of suitable accuracy will be fitted to the well head to enable the recording of the potential pressure build up due to well inflow. If sufficient inflow is observed then further sampling will be undertaken and the well will be swabbed using wire line to reduce hydrostatic pressure and induce further flow.

If hydrocarbons are recovered, it is intended that further testing of the shallowest Reifling formation will be resumed, most likely, after acidization of the reservoir to overcome well bore damage and enhance productivity in the carbonate reservoir.

In parallel with the above-mentioned activities, samples recovered from the testing of the Steinalm formation will be analysed to determine if hydrocarbons are present as well as determining the composition and likely source of solid black particles which were also encountered in the Reifling formation flow test.

The results of the well pressure monitoring, sampling and well fluid analysis are expected to be available early in the new year after which a decision on further stimulation and/or testing operations will be taken.