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在鄂尔多斯盆地崇信地区多用岩心资料来进行烃源岩研究,在取心井少、测试样品有限的情况下,难以表征地下烃源岩段有机碳的实际分布情况。以测井资料为依据,结合岩心分析化验资料,对研究区烃源岩进行研究,利用ΔLogR技术实现了定量计算有机碳含量。改进后的ΔLogR技术与传统方法相比相关度提高了23%,在研究区的应用效果更好。研究发现崇信地区烃源岩质量较好,有机碳含量大部分集中在5%～15%之间,为优质烃源岩。东部地区靠近盆地中心,有机碳含量高,大部分高于5%;西北部遭受剥蚀严重,是全区烃源岩最不发育的地区。
In the Chongxin area, Ordos Basin, multi-purpose core data are used to study source rock. It is difficult to characterize the actual distribution of organic carbon in underground source rocks with few coring wells and limited test samples. Based on the well logging data and combining with the core analysis and laboratory data, the source rock in the study area is studied, and the ΔCrR technique is used to quantitatively calculate the organic carbon content. Compared with the traditional method, the improved ΔLogR technology improves the correlation by 23% and the application effect in the study area is better. The study found that the quality of source rocks in the Chongxin area is good, and the organic carbon content mostly concentrates between 5% and 15%, which is a good source rock. In the eastern part of the basin, near the center of the basin, the organic carbon content is high, most of which is higher than 5%. In the northwest, it is seriously denuded, which is the area where the source rock is the least developed.