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潍北凹陷是昌潍坳陷深层勘探的有利地区,主要目的层系为下第三系的孔二段,目前勘探程度相对较低。对潍北凹陷深层烃源岩样品进行有机质丰度、类型和演化程度分析,结果表明潍北凹陷孔二段烃源岩有机质丰度较高,类型以III型为主,处于成熟高成熟演化阶段。通过对昌67井、央5井的孔二段烃源岩和沉积相资料分析,认为潍北凹陷孔二段烃源岩有机相主要为植源相和混源相。
The Weibei Depression is a favorable area for deep exploration in the Changwei Depression. The main target strata are the second member of the second member of the Lower Paleogene, and the current exploration level is relatively low. The abundance, type and evolution of organic matter in deep source rocks in the Weibei Depression show that the organic matter abundance of the source rocks in the second member of the Kongbei Sag in Weibei Depression is higher, and the type is mainly Type III, which is in the stage of mature and high maturity evolution . Based on the analysis of the source rocks and sedimentary facies of the second member of Chang 67 and Central Yang 5 wells, it is concluded that the organic phase of the source rocks in the second member of the Kongbei depression in the Weibei depression is mainly composed of source and mixed phases.