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通过对双河油田原油链烷烃分布、甾烷萜烷分布及其指纹、碳同位素组成与分布等特征及相关的烃源岩地球化学分析,划分出双浅3型未熟油,Eh3段Ⅰ~Ⅳ油组成熟油,Ⅴ油组高成熟油,Ⅵ~Ⅸ油组高成熟油等4种原油类型,并确定了各自的烃源岩。双浅3型未熟油来源于Eh3上亚段处于未熟-低熟阶段相对富含钙质和页理发育的烃源岩,Ⅰ~Ⅳ油组原油为异地运移而来的Eh3上亚段原油,Ⅴ油组原油为异地运移而来的Eh3段Ⅴ油组生成的原油与Eh3下亚段油源的混合,Eh3下亚段原油来自Eh3下亚段油源层,为异地运移和双河区本身生成的原油不同程度的混合。双河油田成藏特征为:①烃源岩直接向储集岩排烃,具有顺层侧向充注的成藏特征;②与成熟烃源岩垂向互层的储集岩层层含油,各油藏的充注规模受供源规模控制。
Through the geochemical analysis of alkane distribution, the distribution of sterane alkanes, the composition and distribution of carbon isotopes and the related source rocks in Shuanghe oilfield, Oil group mature oil, Ⅴ oil group high mature oil, Ⅵ ~ Ⅸ oil group high mature oil and other four types of crude oil, and to determine their own source rocks. The Shuang Shao 3 type unripe oil is derived from the source rock of the upper Eh3 upper immature-low maturity stage which is relatively rich in calcium and paleogenesis. The crude oil of the Ⅰ-Ⅳ oil group is derived from the Eh3 upper sub-crude , Ⅴ crude oil is migrated from the Eh3 paragraph Ⅴ oil group formation of oil and Eh3 lower sub-oil mixing, Eh3 lower sub-oil from the Eh3 lower sub-source oil layer for the off-site movement and double The river itself produces different levels of crude oil blending. The reservoir forming characteristics of Shuanghe Oilfield are as follows: (1) hydrocarbon source rocks directly drain hydrocarbon into the reservoir rocks and have reservoir-forming features of side-by-side lateral filling; (2) reservoir strata interbedded with mature source rocks are oil- The scale of reservoir charge is governed by the source size.