关键词: 分形方法, 气田, 数量, 储量, 预测

Abstract: Because of oil and gas field numbers and accumulations having fractal relations,the paper introduced fractal method to predict undiscovered gas field numbers and accumulations in the north of Songliao Basin by dividing the sizes of the discovered gas fields into 9 categories.The truncate shifted pareto distribution method is also used to predict total undiscovered gas reserve.The caculated result shows that the reserve predicted by truncate shifted pareto distribution method comforms with the reserve predicted by fractal method very well,which proves the reliability of the fractal method.The following conclusions have been made:there are fractal relationship between the number of oil and gas fields and their sizes,and the fractal method has the good application result in the highly explored basins and zones,but there are some difficulties in newly exploring areas.

Key words: fractal method, gas field, number, accumulation, prediction