南堡1号构造火成岩与断裂发育模式研究

Evolution pattern of igneous rock and fault in NP1 structure

通过开展地质、地震综合研究,建立了南堡凹陷馆陶组火山喷发模式与岩相模式;通过研究南堡凹陷特殊的断裂样式,建立了南堡凹陷火山成因断裂模式.在以上两种地质模式指导下,开展了火山口位置识别和断裂精细解释,新解释了21个火山口,利用能量相位复合属性刻画火成岩分布,准确预测了南堡1号构造中浅层的火成岩分布.研究结果表明：研究区火山口主要分布在南堡1号断裂附近,馆陶组火成岩厚度100~500m之间,南厚北薄,西厚东薄,主力油层区均分布在厚层火成岩之下,为该区有利储层分布预测、油气成藏规律分析和地质储量动用打下坚实基础.

By comprehensive seismic and geological studies, the volcanic eruption pattern and lithofacies model of Guantao formation in Nanpu sag were established in this article. The volcanogenic fault evolution pattern was also figured out based on researches on the unique fault structure of Nanpu sag. Under the guidance of above patterns, the positions of 21 new craters in NP1 structure were identified and the faults were finely interpreted. The distribution of igneous rock in shallow strata of NP1 structure was exactly described through the energy-phase compound attribute analysis technology. The results show that craters in the research area mainly distributes along the NP1 fault zone; the thickness of igneous rock in Guantao formation is 100-500 m, with the south and west thicker than the north and east; the major reservoirs are covered by thick igneous rock strata. The research findings are of great significance to favorable reservoirs prediction in NP1 structure, and would lay solid foundations for oil and gas accumulation pattern analysis and geological reservoir producing in this area.