Due to far away from the hydrocarbon source rock, oil-gas migration and building-up conditions became the main controlling factor of the formation trap reservoir forming.
由于距离烃源岩较远，油气运移聚集条件成为地层圈闭成藏的主要控制因素。
2
Finally, we can predict the reservoir and evaluate the oil-gastrap in the light of the sandstone distribution and geological structure.
再根据砂层分布规律和构造特征进行储集层的预测和油气圈闭评价。
3
A trap is one of the five essential requisites for a commercial accumulation of oil or gas.