四川盆地震旦系裂陷槽内丘滩体研究及其地质意义

四川盆地德阳—安岳裂陷槽的突破，带来了我国单体储量规模最大的安岳气田的发现，随后的研究把该裂陷槽作为主要的生烃中心，其作用主要体现在对烃源岩的贡献上。随着勘探的深入及深层资料品质的提高，在槽内灯影组顶部发现了明显的加厚反射特征存在，结合区域构造演化、地震反射特征、沉积演化等研究，证实了灯影组槽内颗粒丘滩体的存在，创建了震旦系灯影组裂陷槽内颗粒滩沉积新模式，明确了优质储层的形成机制，预测了分布范围，该新目标的发现和落实拓宽了勘探方向，是安岳主体成果向南拓展的重要补充。

Geological research and significance of grain beach in Sinian taphrogenic trough,Sichuan Basin

The breakthrough of Deyang-Anyue taphrogenic trough led to the discovery of Anye gas field in Sichuan Basin, which is the biggest single giant gas filed in China. After that, the taphrogenic trough was regarded as the main source rock, whose function was to supply hydrocarbon only. With the further exploration and the improvement of seismic data quality, the obvious thickening events were discovered in seismic sections. Combined with the studies of regional tectonic evolution, seismic response characteristics and sedimentary evolution, the existence of grain beachs in the trough of Dengying Fm. was confirmed. A new sedimentary model of grain beach in Denying Fm. was established which developed in Sinian taphrogenic trough, the formation mechanism of high-quality reservoir was clarified, and the distribution was predicted. The discovery and implementation of the new target has broadened the exploration orientation and is an important supplement to the southward expansion of the main achievements of Anyue giant gas field.