中文摘要：

大民屯凹陷变质岩潜山变质岩岩性复杂,岩性空间变化较大,储层表现为裂缝—孔隙双重介质的特点,预测其裂缝发育的走向和密度是油气勘探的重要环节。针对研究区高陡裂缝的特点,利用P波在各向异性介质中传播时具有振幅随方位角变化的特性（AVAZ）,对裂缝发育方向和密度等进行了定量—半定量预测。基于叠前道集,采用了三种不同分方位角道集的方案,并结合成像测井成果,对三种预测结果进行了对比分析和优选,认为第一种分方位角方案,即方位角分为0°~110°、110°~130°、130°~180°的方案更适合本区裂缝预测。研究结果显示：大民屯潜山带裂缝主要发育于静安堡构造带和平安堡构造带;在西部潜山带,裂缝发育方位主要为NWW—NNW向;在中部潜山带,主要发育NW向。

英文摘要：

Damintun depression metamorphic buried hill has complex lithology, which can change greatly, and the reservoir performs the features of crack-porosity dual media, so it is an important part of the oil and gas exploration to the predicted direction and density of fractures. For the study area characterized by high steep fractures, the paper uses P wave propagation that has an amplitude variation with azimuth characteristic to predict the direction and density of fractures by quantitative and semi-quantitative way. Based on prestack gathers, three different azimuth gathers are conducted. Combining with imaging logging results, the three predicted results are compared and the first sub-program is preferred that azimuth divided 0°-110°.110°-130°.130°-180°scheme, which is more suitable for fracture prediction in this area. By studying the results, major fractures of Damintun hill are developed in the construction zone of Jinganbao and Pinganbao tectonic belt. In the western zone of Damintun buried hill fracture azimuth is mainly in NWW NNW direction and is mainly in NW direction in the central hill zone.