山东泰莱凹陷姚庄地区油页岩特征及成因分析

为评价泰莱凹陷姚庄地区油页岩资源潜力,开展了6口地质井的钻探、二维地震勘探和多项油页岩的样品分析测试工作。根据油页岩分析测试资料,结合录井、测井、地震、沉积等研究成果,总结了油页岩主要特征,对该区油页岩成因进行了初步分析。结果表明:泰莱凹陷姚庄地区油页岩主要发育在大汶口组中段沉积时期的湖相沉积中,大汶口组中段油页岩矿层与地层产状一致,走向277°,倾向7°,倾角4°~5°,矿层顶板埋深108.40m,矿层底板埋深272.06m,厚度0.80~2.29m,平均岩石密度为1.90t/m^3,含油率3.12%~4.07%,平均含油率3.48%。

Characteristics and Origin Analysis of Oil Shale in Yaozhuang Area of Tailai Depression in Shandong Province

In order to evaluate the potential of oil shale resources in Yaozhuang area of Tailai depression, drilling of six geological wells, twodimensional seismic exploration and sample analysis and testing of several oil shale have been carried out. According to the analysis and test data of oil shale, combining with the research results of logging, seismic and sedimentation, main characteristics of oil shale have been summarized, and the origin of oil shale in this area has been preliminarily analyzed. As showed by the results, oil shale in Yaozhuang area in Tailai depression mainly developed in the lacustrine facies deposition in middle sedimentary period of Dawenkou group. The strata of oil shale in the middle section of Dawenkou formation is consistent with the attitude of the occurrence of strata. The trend is 277°, the inclination is 7°, the dip angle is 4°~5°, the buried depth of the roof is 108.40m, the buried depth of the floor is 272.06 m, the thickness is 0.80~2.29m, the average rock density is 1.90t/m3, the oil content is 3.12%~4.07%, and the average oil rate is 3.48%.