APPLICATION OF STATISTIC METHODS IN PETROLEUM RESOURCES QUANTITATIVE ASSESSMENT IN THE QIANJIANG SAG, THE JIANGHAN BASIN
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摘要: 根据江汉盆地潜江凹陷已探明油田储量规模分布特点、历年石油产量和单井发现率数据变化趋势,选用了油田规模序列法、翁氏生命旋回法和勘探效益法3种统计方法,在分析不同方法的数学原理、数学模型、参数特征及适用条件的基础上,从不同侧面计算潜江凹陷石油资源量。计算结果表明,潜江凹陷石油地质资源量为16 535.2×104t,目前资源探明程度虽然较高,但仍有一定的资源潜力,预计石油待探明资源量有5 202.2×104t,这将为潜江凹陷石油勘探部署和编制中长期发展目标提供地质依据。Abstract: Based on the distribution characteristics of proven oil field reserves size and the changing trend of oil yield and discovery rate per exploration well over the years in the Qianjiang Sag,the Jianghan Basin,three different kinds of statistic methods such as pool size sequence,Weng's life cycle and exploration benefit method have been chosen in the paper.On the foundation of analyzing mathematical principle,mathematical model,parameter feature and application condition,petroleum resources in the Qianjiang Sag are estimated from different angles.The study shows that the amount of petroleum resources in the Qianjiang Sag is about 16 535.2×104 t.Though the exploration degree of petroleum resources is high at present,there still remains some resource potential.The amount of unproven resources is about 5 202.2×104 t,which will provide geological basis for oil and gas exploration plan and medium and long-term development goal.
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