徐家围子断陷在断陷期有3次较大规模的火山活动,营城期火山活动持续时间最长。火山活动加速了深层火石岭组、沙河子组、营城组3套主力烃源岩的成熟。烃源岩的埋藏史、热史和生烃史模拟计算结果表明,徐家围子断陷深层火石岭组烃源岩埋深1...徐家围子断陷在断陷期有3次较大规模的火山活动,营城期火山活动持续时间最长。火山活动加速了深层火石岭组、沙河子组、营城组3套主力烃源岩的成熟。烃源岩的埋藏史、热史和生烃史模拟计算结果表明,徐家围子断陷深层火石岭组烃源岩埋深1300 m 的 R_o 值,在约1Ma 时间内迅速达到0.7%。沙河子组以及火石岭组烃源岩埋深约2600 m 时,R_o 值已经达到1%。泉头组沉积前,沙河子组及火石岭组烃源岩已进入生气高峰。青山口组沉积前,营城组烃源岩处于生气高峰,沙河子组以及火石岭组开始生成干气。此时,登娄库组二段和泉头组一、二段区域盖层业已形成,徐家围子断陷开始形成营城组—泉头组天然气藏。嫩江期末,由于边界断层的活动,营城组—泉头组天然气藏进行再分配。展开更多
By studing the lithofacies of coring well sections, lithofacies assemblages and vertical sedimentary sequences , several types of sedimentary environments including sandy braided channels, low sinuosity channels , cre...By studing the lithofacies of coring well sections, lithofacies assemblages and vertical sedimentary sequences , several types of sedimentary environments including sandy braided channels, low sinuosity channels , crevasse splays, interstreams lakes , transgressive deltas , shore shallow lakes etc. can be recOgnized in Fuyang oil reservoirs(K1q3+4).During the sedimentary period of Yangdachengzi oil reservoir, the braided and low sinuosity channels in northern, western and southern sedimentary systems converged in the eastern basin and developed into meandering streams. Along with the sedimentation of Fuyu reservoirs, streams in the western basin began to form lakes. At the late sedimentary stage of Fuyu oil reservoir, lakes quickly extended. Only the sedimentary system in the south developed transgressive delta deposit because of the abundant supplies of sediments. But in other regions, estuarine sandbars were transformed to shore shallow lakes composed of siltstones and thin interbeds.展开更多
文摘徐家围子断陷在断陷期有3次较大规模的火山活动,营城期火山活动持续时间最长。火山活动加速了深层火石岭组、沙河子组、营城组3套主力烃源岩的成熟。烃源岩的埋藏史、热史和生烃史模拟计算结果表明,徐家围子断陷深层火石岭组烃源岩埋深1300 m 的 R_o 值,在约1Ma 时间内迅速达到0.7%。沙河子组以及火石岭组烃源岩埋深约2600 m 时,R_o 值已经达到1%。泉头组沉积前,沙河子组及火石岭组烃源岩已进入生气高峰。青山口组沉积前,营城组烃源岩处于生气高峰,沙河子组以及火石岭组开始生成干气。此时,登娄库组二段和泉头组一、二段区域盖层业已形成,徐家围子断陷开始形成营城组—泉头组天然气藏。嫩江期末,由于边界断层的活动,营城组—泉头组天然气藏进行再分配。
文摘By studing the lithofacies of coring well sections, lithofacies assemblages and vertical sedimentary sequences , several types of sedimentary environments including sandy braided channels, low sinuosity channels , crevasse splays, interstreams lakes , transgressive deltas , shore shallow lakes etc. can be recOgnized in Fuyang oil reservoirs(K1q3+4).During the sedimentary period of Yangdachengzi oil reservoir, the braided and low sinuosity channels in northern, western and southern sedimentary systems converged in the eastern basin and developed into meandering streams. Along with the sedimentation of Fuyu reservoirs, streams in the western basin began to form lakes. At the late sedimentary stage of Fuyu oil reservoir, lakes quickly extended. Only the sedimentary system in the south developed transgressive delta deposit because of the abundant supplies of sediments. But in other regions, estuarine sandbars were transformed to shore shallow lakes composed of siltstones and thin interbeds.
