分形方法在苏北盆地金湖凹陷石油资源评价中的应用

成熟勘探区剩余资源量的多少倍受关注。根据金湖凹陷的油藏规模分布特征,应用分形方法估计该区的石油地质资源。石油地质资源总量为12284×10⁴t,分布在507个油藏中;其中未发现的具有经济价值的石油地质资源量为2740×10⁴t,分布在126个油藏中。这反映了该区的油气勘探程度较高,但仍有一定的勘探潜力,大量中-小油藏是今后勘探的主攻目标。分形方法作为油气资源评价的一种新途径,计算过程简便,结果可靠,应用前景广阔。

APPLICATION OF FRACTAL METHOD PREDICATING OIL RESOURCES IN THE JINHU SAG, NORTH JIANGSU BASIN

How much oil and gas remain to be discovered in mature oilfields is an important question for petroleum geologists. This paper presented a fractal approach to assess remaining oil potential in the Jinhu Sag, North Jiangsu Basin, and estimated the size distribution of the oil pools remaining to be discovered. On the basis of data obtained through 2004, we predicted that the total resource was 122.84 million tons of oil occurring in approximately 506 pools, and the commercial undiscovered resource was 27.4 million tons of oil occurring in about 126 pools. Both exploration data and resource assessment results suggested that the largest pools were found efficiently, and more small pools were estimated to be commercially developable. Fractal method might provide a simple, straightforward, and flexible means for geologists to use statistics as an aide in estimating undiscovered resources.