Reservoir confinement by faults is important for safe storage of liquid waste or hydrocarbons. Having access to 3D seismic and borehole data, we have interpreted the tectonic setting of the Wysoka Kamienska Graben (WKG) in the NW part of the Polish Basin and subsequently made an interpretation of the sealing potential of the graben-bounding faults. The formation and development of the graben in the Late Triassic and Early Jurassic was controlled by mechanical decoupling in the salts of the Zechstein Group. The primary tectonic factor triggering the graben origin was dextral strike-slip movement along the regional fault zone in the Paleozoic basement, transtensional accommodation of which in the Zechstein-Mesozoic cover led to development of a horse-tail pattern of grabens. During the Late Cretaceous, the graben underwent minor tectonic inversion. Sealing potential analysis of the graben-bounding faults was performed for the Triassic–Jurassic sequence including juxtaposition seal and fault gouge seal components. Finally, we have focussed our interpretation on the Jurassic sequence where the best reservoirs have been recognized. Our results indicate good to moderate sealing potential of the Hettangian reservoir, poor to moderate sealing of the Pliensbachian reservoir and lack of sealing of the Bajocian reservoir. Hence, the Hettangian reservoir, characterized by large thickness, low clay content and a large regional extent, acts as a potential storage formation, being confined by the graben-bounding faults of the WKG

中文翻译：

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Wysoka Kamieńska Graben（波兰西北部）的构造及其对断层封闭潜力的影响

断层限制储层对于液体废物或碳氢化合物的安全储存很重要。通过获得 3D 地震和钻孔数据，我们解释了波兰盆地西北部 Wysoka Kamienska Graben (WKG) 的构造环境，随后解释了地堑边界断层的封闭潜力。晚三叠世和早侏罗世地堑的形成和发育受 Zechstein 群盐的机械脱钩控制。触发地堑成因的主要构造因素是古生代基底沿区域断裂带的右旋走滑运动，其在Zechstein-中生代盖层中的穿张适应导致地堑的马尾型发育。在白垩纪晚期，地堑经历了轻微的构造反转。对三叠纪-侏罗纪层序地堑边界断层的封闭潜力进行了分析，包括并列封闭和断层泥浆封闭组分。最后，我们将我们的解释集中在侏罗纪序列上，那里已经识别出最好的储层。我们的研究结果表明，Hettangian 储层具有良好至中等的封闭潜力，Pliensbachian 储层的封闭能力较差至中等，而 Bajocian 储层则缺乏封闭性。因此，受WKG地堑边界断层限制的Hettangian储层厚度大、粘土含量低、区域范围大，是潜在的储集层。我们将我们的解释集中在侏罗纪序列上，那里已经发现了最好的储层。我们的研究结果表明，Hettangian 储层具有良好至中等的封闭潜力，Pliensbachian 储层的封闭能力较差至中等，而 Bajocian 储层则缺乏封闭性。因此，受WKG地堑边界断层限制的Hettangian储层厚度大、粘土含量低、区域范围大，是潜在的储集层。我们将我们的解释集中在侏罗纪序列上，那里已经发现了最好的储层。我们的研究结果表明，Hettangian 储层具有良好至中等的封闭潜力，Pliensbachian 储层的封闭能力较差至中等，而 Bajocian 储层则缺乏封闭性。因此，受WKG地堑边界断层限制的Hettangian储层厚度大、粘土含量低、区域范围大，是潜在的储集层。