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常规的烃源岩有机地球化学分析评价方法往往受样品分析数量和岩心质量的制约,很难真实地揭示烃源岩的空间分布特征,而采用测井和地球化学分析相结合的方法,却能够通过纵向连续的高分辨率测井信息快速准确地计算出地层的有机碳含量,识别出烃源岩在空间上的变化特征。依据湖相泥岩TOC—IH关系将冀中坳陷烃源岩划分为3个级别:TOC≥2%为优质烃源岩,TOC=1%~2%为中等烃源岩和TOC=0.5%~1%为差烃源岩。冀中坳陷饶阳凹陷古近系湖相烃源岩在平面上和剖面上受沉积相带的控制,从盆地边缘到湖盆中心,烃源岩从薄互层向集中大套发育段变化,优质烃源岩集中发育于洼槽区。通过烃源岩测井评价,并结合资源潜力和分布状况分析,认为潜山、古近系深层岩性、中浅层复杂断块和新近系浅层岩性构造勘探领域是饶阳凹陷深化勘探的重要方向。
Conventional source rock organic geochemical analysis and evaluation methods are often constrained by the number of sample analysis and core quality, it is difficult to truly reveal the spatial distribution characteristics of source rocks, but the combination of logging and geochemical analysis method can The organic carbon content in the stratum is calculated quickly and accurately by the longitudinal continuous high-resolution log information, and the spatial variation of the source rock is identified. Based on the TOC-IH relationship of lacustrine mudstone, the source rocks of Jizhong depression are divided into three grades: TOC≥2% is high quality source rock, TOC = 1% -2% is middle source rock and TOC is 0.5% 1% is poor source rock. The Paleogene lacustrine source rocks in the Raoyang Sag of the Jizhong Depression are controlled by sedimentary facies in the plane and in the section. From the margin of the basin to the center of the lake basin, the source rocks vary from thin interbed to concentrated large sets of developmental stages , High-quality source rocks concentrated in the depression area. Based on the analysis of hydrocarbon source rocks, combined with the analysis of resource potential and distribution, it is considered that the buried hill, the Paleogene deep lithology, the middle and shallow complex fault blocks and the Neogene shallow lithology structural exploration are the exploration of the Raoyang depression The important direction.