南华北盆地青白口系岩相古地理特征及油气地质条件

Southern Huabei basin's lithofacies-paleogeographic features and oil-gas geological condition

以野外露头剖面、钻井岩心资料观测与分析为基础,依据岩石组合、沉积组构和剖面序列等特征,研究南华北盆地青白口系沉积体系类型,识别滨岸、碎屑岩潮坪和陆棚3种沉积体系,分析不同时期岩相古地理特征及时空演化.在岩相古地理研究基础上,探讨青白口系烃源岩、储集层及生储盖组合等油气地质条件.结果表明:青白口系沉积相带总体表现为南北向分带、东西向展布的格局,演化过程中水体逐渐变浅,由滨岸—陆棚沉积环境逐渐向碎屑岩潮坪沉积环境过渡.研究结果为南华北盆地青白口系油气预测提供基础地质资料.

In the field of outcrop and drilling cores and logging data detailed observation and analysis of the basis of rock combination,sedimentary fabric,sedimentary structure and profile features,such as south sequence in north China stimulation mouth sedimentary system type characteristic are studied,identifying shore bank,clastic YanChao ping and shelf three depositional systems.Meanwhile,different period lithofacies-paleogeographic features and space-time evolution are analyzed,analysis shows that the stimulation mouth sedimentary facies overall performance from zoning,east-west exhibition cloth pattern,early or late by the evolution process,water becomes shallow gradually,the shore bank-xichuan environment gradually to tidal-flat sedimentary environment transition.In lithofacies-paleogeographic research foundation to stimulation mouth hydrocarbon source rocks,reservoir and soure-reservior-roof,oil-gas geological conditions are discussed,to the south Huabei basin stimulation mouth for oil and gas forecast is providing geological data.