利津—胜北断裂带沙三—沙四段成藏模式

Patterns of the reservoir forming of the Es_3-Es_4 in Lijin-Shengbei fault zone

利津—胜北断裂带断裂系统复杂,成藏类型多样。北部靠近基底断层的陡坡带主要发育退积序列的近岸水下扇,东西向成裙带状分布,往南在同生断层的下降盘,扇体延伸至断陷湖盆深处的烃源岩,形成透镜体状砂体。勘探工作面临成藏条件复杂、储层预测精度低等困难挑战。从物源入手,利用断层活动定量分析,研究断裂活动对储层分布的影响,结合成藏条件,构建合理的成藏模式。

The fault system is complicated in Lijin- Shengbei fault zone and the type of the reservoir forming is various. The retrograding beachy subaqueous fans which mainly developed in the steep slope zone near the basement fault in the north are distributed waistband- like in the WE, and the bodies of the fan are extended to the source rock of the deep of fault- through lake and formed the lenticular sand bodies at the downthrown side of the contemporaneous fault towards the south. The exploration faces a challenge with complex reservoir forming and low precision of reservoir prediction. The impact of the fault action on the reservoir distribution are researched by analyzing quantitatively faulting from the source rock, and a reasonable pattern of reservoir forming are built combined with reservoir forming conditions.