辽河西部凹陷雷家地区沙四段油气资源结构特征

发布时间：2018-10-05 20:14

【摘要】：油气资源结构是指不同类型油气资源量的大小及空间配置关系,其研究结果能为勘探决策提供重要支撑。辽河西部凹陷中北部雷家地区沙河街组四段发育优质烃源岩和多种类型储层,形成常规、非常规石油协同发育,低熟、成熟石油混合聚集特征。在成藏要素综合分析的基础上,研究了雷家地区沙四段常规油、致密油、页岩油空间分布特征。结合盆地模拟法、小面元容积法、EUR分布类比法、体积法估算雷家地区沙四段生烃量、排烃量、滞留量和聚集量,详细研究了沙四段资源定量组成及分布特征,建立沙四段油气资源结构模型。结果表明,雷家地区沙四段以生油为主,页岩油分布在洼陷中心,致密油环绕页岩油分布,常规油聚集在页岩油和致密油分布区外围。缓坡带—洼陷带—陡坡带剖面上,依次分布低熟稠油、低熟—成熟混源致密油、成熟页岩油和成熟常规油。沙四段烃源岩总生油量为12.9×10~8t,总的石油地质资源量为10.45×10~8t。其中,页岩油地质资源量为7.51×10~8t,占比71.9%;致密油地质资源量为2.25×10~8t,占比21.5%;常规油地质资源量为0.69×10~8t,占比6.6%。页岩油、致密油、常规油地质资源量的比例约为11∶3∶1。
[Abstract]:The structure of oil and gas resources refers to the relationship between the size and spatial distribution of different types of oil and gas resources. The research results can provide important support for exploration decision. The fourth member of Shahejie formation in the central and northern part of the western depression of Liaohe developed high-quality source rocks and various types of reservoirs, forming conventional, unconventional petroleum synergistic development, low mature and mature petroleum mixed accumulation characteristics. Based on the comprehensive analysis of reservoir forming elements, the spatial distribution characteristics of conventional oil, dense oil and shale oil in the 4th member of Shahejie formation in Lejia area were studied. Combined with basin simulation method, small area volume method, EUR distribution analogy method and volume method, hydrocarbon generation, hydrocarbon expulsion, retention and accumulation of the fourth member of Shahejia area are estimated. The quantitative composition and distribution characteristics of the resources in the fourth member of the formation are studied in detail. The oil and gas resource structure model of Sha 4 member is established. The results show that the fourth member of Shahe formation in Lejia area is dominated by oil generation, shale oil is distributed in the center of depression, dense oil is distributed around shale oil, and conventional oil is concentrated in the periphery of shale oil and dense oil distribution area. In the profile of gentle slope zone, sag zone and steep slope zone, low mature heavy oil, low mature and mature mixed source dense oil, mature shale oil and mature conventional oil are distributed in turn. The total oil generation and petroleum geological resources of source rocks and petroleum geological resources are 12.9 脳 10 ~ (8) t and 10.45 脳 10 ~ (8) t respectively. Among them, the geological resources of shale oil are 7.51 脳 10 ~ (-8) t (71.9%), that of dense oil is 2.25 脳 10 ~ (8) t, and that of conventional oil is 0.69 脳 10 ~ (8) t. The geological resource ratio of shale oil, dense oil and conventional oil is about 11: 3: 1.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油天然气股份有限公司重大专项“油气资源评价—中国石油第四次油气资源评价”(编号:2013E-0502)资助
【分类号】：P618.13

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