北黄海地球化学勘探及含油气远景预测

根据海面低层大气中烃类异常和海底沉积物中微生物地球化学异常检测结果，结合区域地质及钻井资料，可以将北黄海盆地划分为东、中、西3个含油气远景区，其中，呈近南北向展布的中部区偏南部，低层大气中甲烷含量为连续高值，分布均匀且离散度较小，海底微生物异常强度最大，含油气远景最好；东部区低层大气中甲烷含量为中-高值，海底微生物异常强度次之，含油气远景较好；西部区低层大气中甲烷呈零星高值出现，海底微生物异常强度较弱，含油气远景较差。

Oil-Gas Geochemical Exploration and Its Perspective Prediction in the North Yellow Sea Basin

Anomalous hydrocarbon gases at the lower atmosphere and microbial germs in the subsurface sediment are found in the North Yellow Sea basin. In combination with the regional geological data and the proven oil-gas discoveries, the anomalies are indicative of three oil-gas prospects in the North Yellow Sea, which are located in the east, the middle and the west of the study area respectively. The middle oil-gas prospect, which is in the south of the N-S striking heave, is an area with a great potential, where methane concentrations at the lower atmosphere are homogeneously and continuously high in the plane with little variance and microbial germs in the subsurface sediment are of the strongest anomalies. The east oil-gas prospect is a relatively good potential area, where methane concentrations at the lower atmosphere ranges from middle to high levels and microbial germs in the subsurface sediment is of strong anomalies. The west oil-gas prospect is of little expectation for oil-gas because methane concentrations at the lower atmosphere are occasionally high in the plane and microbial germs of subsurface sediment are of relatively weak anomalies.