三塘湖盆地二叠系芦草沟组裂缝发育规律分析

Analysis on the Regularity of Fracture Development in Permian Lucaogou Group, Santanghu Basin

二叠系芦草沟组是三塘湖盆地的主要勘探目的层之一,为一套海陆过渡相地层,盆地广泛分布。中二叠统芦草沟组(P2l)为裂缝和裂缝-孔隙型储层,裂缝在改善储层渗流特征方面起了决定性作用。因此,要想取得芦草沟组的油气勘探突破,必须加强裂缝的研究。在岩心裂缝观察和测井裂缝解释、统计的基础上,通过地质理论分析裂缝和构造、岩性、单层厚度、埋深等地质因素的关系,总结出三塘湖盆地二叠系芦草沟组裂缝发育规律。

The Permian Lucaogou group of transitional facies is one of major exploration targets in Santanghu basin with wide distribution. Lucaogou group （Pll） of Middle Permian is a fracture to fractured -porous reservoir, where fractures play a decisive role in improving reservoir percolation characteristic. Therefore, the study of fractures should be strengthened in order to make breakthroughs in oil - gas exploration there. Based on the observation of core fractures and the interpretation and statistics of fractures from well log, the relation between fracture and geological factors such as tectonic, lithology, thickness of single layer and buried depth is analyzed according to geological theory, the regularity of fracture development in Permian Lucaogou group of Santanghu Basin is summarized.