世界油气田规模分布的分形研究  

Fractal Study on Oil and Gas Field Size Distribution of the World

作　　者：肖芳锋[1,2] 侯贵廷[1] 李乐[1] 王延欣[1] 舒武林[1] 张庆莲[1] 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中化石油勘探开发有限公司,北京100031

出　　处：《应用基础与工程科学学报》2011年第1期95-103,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金(40772121;40172066和40314141);国家973课题(2009CB219302)

摘　　要：油气田规模分布对油公司及政府油气勘探策略意义重大.本文从数学规律的角度,应用分形理论对油气田规模与数量之间的规律进行研究.油气田规模分布的分数维D及分形拟合线可通过最小二乘法拟合得到.D定义为勘探成熟度,代表某区域勘探成效.其值越高,表明这个特定区域已发现的油气田越多而未发现的越少.分形拟合线包含有大量信息,包括:某一地区油气田的最大规模;大于某一储量级别油气田的累积总数等.这些信息将有助于分析某区域油气资源丰度、可能发现的油气田规模及其数目.通过对比世界不同地区油田规模分布的D值及分形拟合线,可以得出:美国勘探成熟度最高,新发现大型油气田的可能性也就最小;中东地区油气资源最为富集,发现大型油气田的可能性也最大:规模大于1000MMBoe的油田达50个,大于10000MMBoe的达12个(设定所有存在的油田都被发现).Oil and gas field size distribution information is important for oil companies and governments to make investment decision on petroleum exploration.This paper discussed field size analysis based on fractal theory regardless of geological conditions.Fractal dimension（D） of field size distribution and fractal fitting line were obtained by using least square method.D,named exploration maturity,demonstrates exploration effect of a certain area.The higher of D,stands for the more fields found and the fewer to be found.Meanwhile,fractal fitting line shows the maximum field size and the accumulated field numbers above a certain reserves scale.Therefore,D together with fractal line helps to evaluate the richness of oil resource,the size and the magnitude to be found in an area.Applying the method to different places of the world,we get that USA is the maturest explored area with little potential to find large fields,and Middle East is the richest petroleum accumulation region bearing the highest potential to find huge fields： size over 1000 MMBoe is about 50,and size over 10000 MMBoe comes to 12（supposing all the existing fields be found）.

关 键 词：分形 油气田规模分布 分数维 分形拟合线 

分 类 号：TE155[石油与天然气工程—油气勘探]