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测井评价烃源岩具有分析费用低、纵向连续性好、实用性强等特点。该文以烃源岩理论模型和有机质物理性质为基础,分析了银额盆地天草凹陷烃源岩的常规测井响应特征。通过建立测井参数(GR、AC、RD、CNL、DEN等)与TOC的关系,定量评价该地区烃源岩。在评价方法上,使用△lgR法,多元回归法,BP人工神经网络法相互对比印证,较好的反映出了该地区烃源岩的垂向上丰度变化,证实了银额盆地天草凹陷地区下白垩统等地层烃源岩良好的丰度条件。
Well logging evaluation of source rock with low cost analysis, longitudinal continuity, practicality and so on. Based on the theoretical model of source rock and the physical properties of organic matter, the paper analyzes the conventional logging response characteristics of source rocks in Tiancao Sag of Yin-Qian Basin. By establishing the relationship between logging parameters (GR, AC, RD, CNL, DEN, etc.) and TOC, the source rocks in this area can be quantitatively evaluated. In the evaluation method, the comparison between △ lgR method, multiple regression method and BP artificial neural network method confirms the change of vertical abundance of source rocks in this area, and confirms that under the Yincao Basin, Cretaceous and other stratigraphic source rock good abundance conditions.