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饶阳凹陷武强地区原油物性存在较大的差异,具体生油层位不明确。在原油地球化学特征综合研究的基础上,通过选取5α-20S-C29/5α-20(S+R)C29和Pr/Ph两个指标,将研究区原油划分为两种类型。分析表明,一种是热演化程度较低,母岩沉积于咸化-半咸化和较强还原环境的稠油,主要产自Es2、Ng和少数的Es3,其具体烃源岩层位主要为Es1下与Es3上未熟-低熟烃源岩;另一类是来源于生油高峰期附近,母岩沉积环境为为淡水-微咸水和弱还原环境的正常密度原油,主要产自Es3,其烃源岩层位为Es3中与Es3下成熟烃源岩。这一认识,对于查明油气运移途径,进行科学的勘探部署,具有重要意义。
The physical properties of crude oil in Wuqiang area of Raoyang sag are quite different, and the specific reservoir level is not clear. Based on the comprehensive study of geochemical characteristics of crude oil, the crude oil was divided into two types by selecting 5α-20S-C29 / 5α-20 (S + R) C29 and Pr / Ph. The analysis shows that a heavy oil with low thermal evolution and parent rocks deposited in the salinization-semi-salting and strong reduction environment is mainly produced from Es2, Ng and a few Es3. The main source rocks are Es1 and Es3 on the immature - low maturity source rock; the other is derived from peak oil production near the mother rock deposition environment is freshwater - brackish water and weak reduction of normal density crude oil, mainly produced from Es3, The source rocks are Es3 and Es3 mature source rocks. This understanding is of great significance for identifying the oil and gas migration route and for conducting scientific exploration and deployment.