辽河盆地大民屯凹陷油页岩测井评价

Log Evaluation of Oil Shale in Damintun Sag of Liaohe Basin

辽河盆地大民屯凹陷内发育有丰富的油页岩,通过对大民屯凹陷内沙四段油页岩段测井响应特征的研究,在现有的油页岩测井响应特征和测井评价方法的基础上,利用声波时差和自然电位曲线对△logR重叠法进行了拓展,建立了该区油页岩测井解释模型,建立并验证了大民屯凹陷△logR与总有机碳的数学关系模型,对凹陷内的油页岩及上覆泥岩的总有机碳进行了评价。研究结果表明,沙四段总有机碳含量高的油页岩,主要分布在凹陷的西北部的安福屯地区。

The oil shale are well developed in damintun sag of liaohe basin,we developed the△logr overlap method of acoustic travel-time differences and self-potential curve,and established the interpretation model of oil shale logging.the result,calculating from this model,are well consistent with the real data,then we regress the relationship between the total organic carbon with△logr.based on the relationship we evaluate the oil shale and the overlying mudstone.the result show that the calculated total organic carbon method are effective for oil shale in damintun sag,and the good total organic carbon of the fourth member of shahejie formation are distribute in the anfutun,the northwest of damintun sag.