摘要
为了提高中低勘探程度盆地油页岩资源量预测的精度,把地质类比法引入油页岩资源量的估算中。结合松辽坳陷盆地油页岩发育特征,依据油页岩的成矿富集机制,优选主控油页岩生成富集的主要地质参数作为刻度区与预测区类比的相似系数;二态定性量化不同类型地质参数,求取预测区类比系数及分布函数;结合刻度区资源丰度分布函数,采用蒙特卡洛法组合抽样估算预测区油页岩资源量。结果表明:松辽盆地油页岩资源量在整个概率区间为77.123～22 810.142亿t,第1次"全国油页岩资源评价"油页岩资源量与概率为65%时相当,类比直乘法计算油页岩资源量与概率为61%时相当,相比第1次"全国油页岩资源评价"有所增加。因此,地质类比法能有效预测中低勘探程度盆地油页岩资源量。
The geological analogy was employed to evaluate the oil shale resources,in order to improve the prediction precision in middle-low exploration basin.Main geological parameters of controlling the generation and enrichment of oil shale was optimized in terms of the development characteristics of oil shale and its metallogeny and enrichment mechanisms in the Songliao depression basin.Moreover,these geological parameters were quantified through the qualitative binary status approach to calculate analogical coefficients and its distribution function of predicting area.Finally,combination of sampling from Monte-carlo method was used to estimate oil shale resources of predicting area.The results show that oil shale resources of Songliao Basin is 7.712 3~2 281.014 2 gigaton during the whole probability interval,the oil shale resources from the first ＂National Oil Shale Evaluation＂ matches 65% of probability from above estimation.In contrast,that from direct square method matches 61% of probability,which is slight higher than the former.Therefore,the geological analogy is a promising approach to evaluate oil shale resources of middle-low exploration basin,and it can bring the estimate with successful hold.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第9期1474-1480,共7页
Journal of China Coal Society
基金
国家自然科学基金资助项目(40972076)
国家科技重大专项资助项目(2008ZX05018-001-004)
吉林大学研究生创新基金资助项目(20111043)
关键词
松辽盆地
油页岩
地质类比法
成矿富集机制
蒙特卡洛法
Songliao Basin
oil shale
geological analogy
metallogenic and enriching mechanism
monte-carlo method
