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对惠州凹陷HZ25-4-1井珠江组-文昌组砂岩储层进行了系统取样和生物标志物分析。利用烃类流体运移痕迹生物标志物分子示踪技术,结合生烃强度盆地模拟结果,初步判识惠州凹陷存在2类混源油,即文昌组中深湖相型原油与恩平组煤系型原油的混源和文昌组中深湖相型原油与浅湖相型原油的混源,证实了惠州凹陷文昌组浅湖相泥岩为有效烃源岩。这一认识对惠州凹陷成油体系的划分具有重要意义。
The systematic sampling and biomarker analysis of sandstone reservoirs of Zhujiang Formation-Wenchang Formation in HZ25-4-1 Well in Huizhou Depression were conducted. Based on the biomarker molecular tracing technique of hydrocarbon migration trace and the simulation results of hydrocarbon generation intensity, two types of mixed oil were identified in Huizhou depression, that is, the middle-deep lake facies crude oil of Wenchang Formation and the coal series of Enping Formation The mixed source of crude oil and the mixed source of medium and deep lake facies crude oil and shallow lake facies crude oil in Wenchang Formation confirm that shallow lacustrine mudstone of Wenchang Formation in Huizhou Depression is an effective hydrocarbon source rock. This understanding is of great significance to the division of oil system in Huizhou Depression.