贝尔凹陷油藏形成过程及油富集的主控因素
来源期刊：中南大学学报(自然科学版)2012年第12期
论文作者：付广 李海丽
文章页码：4850 - 4858
关键词：早期油藏；晚期油藏；形成过程；主控因素；贝尔凹陷
Key words：oil and gas reservoirs formed in early period; oil and gas reservoirs formed in late period; forming procession; main controlling factors; Beier Depression
摘 要：为了研究贝尔凹陷油藏形成过程及油富集的主控因素，利用储层流体包裹体均一温度和自生伊利石Ar和K同位素测年资料，结合储层埋藏史和热史，将油藏按成藏期分为早期和晚期2种，早期油藏主要形成于伊敏组沉积晚期，剖面上主要分布在基岩、铜钵庙组和南一段，平面上贝中、苏德尔特、霍多莫尔和呼和诺仁4个油田皆有分布。晚期油藏主要形成于伊敏组沉积末期~青元岗组沉积时期，剖面上主要分布在大磨拐河组和南二段，平面上仅分布在贝中和霍多莫尔2个油田，早期油藏形成过程中油富集主要受到3个方面因素的控制：源岩区控制着早期油气藏形成与分布的范围；反向断裂翘倾隆起和洼中隆是早期油气藏形成的有利部位；扇三角洲前缘亚相砂体为早期油气藏形成提供了储集空间。晚期油气藏形成过程油富集主要受到3个方面因素的控制：南一段源岩区控制着晚期油气藏形成与分布的范围；反转构造是晚期油气藏形成的有利部位；长期发育断裂为晚期油气藏形成提供了输导通道。
Abstract: To study the forming procession of oil and gas reservoirs and main controlling factors of oil accumulation in Beier Depression, by using fluid inclusion homogenization temperature and Ar and K isotope dating of authigenic illites, combined with burial history and thermal history, oil and gas reservoirs are divided into oil and gas reservoirs formed in early period and oil and gas reservoirs formed in late period. Oil and gas reservoirs formed in early period mainly formed in the end of K1y sedimentary period, on section they mainly distribute in base rock, K1t and K1n1; on plane they distribute in Beizhong, Sudeerte, Huoduomoer and Huhenuoren. Oil and gas reservoirs formed in late period mainly formed in the end of K1y sedimentary period to K2q sedimentary period, on section they mainly distribute in K1d and K1n2; on plane they only distribute in Beizhong and Huoduomoer. Three different main controlling factors of oil accumulation for forming procession of oil and gas reservoirs formed in early period have been recognized: distributions of source rock control the formation and distribution of o, il and gas reservoirs formed in early period; tilting uplift formed by reverse fault and uplift in sag are the favorable place to form oil and gas reservoirs in early period; sand bodies of fan delta front provide accumulating place to form oil and gas reservoirs in early period. Three different main controlling factors of oil accumulation for forming procession of oil and gas reservoirs in late period are recognized: source rock zone in K1n1 controls the formation and distribution of oil and gas reservoirs formed in late period; reversal structure is the favorable place to form oil and gas reservoirs in late period; long-period developing faults provide passageway for oil and gas reservoirs formed in late period.
付广，李海丽
(东北石油大学 地球科学学院，黑龙江 大庆，163318)
摘 要：为了研究贝尔凹陷油藏形成过程及油富集的主控因素，利用储层流体包裹体均一温度和自生伊利石Ar和K同位素测年资料，结合储层埋藏史和热史，将油藏按成藏期分为早期和晚期2种，早期油藏主要形成于伊敏组沉积晚期，剖面上主要分布在基岩、铜钵庙组和南一段，平面上贝中、苏德尔特、霍多莫尔和呼和诺仁4个油田皆有分布。晚期油藏主要形成于伊敏组沉积末期~青元岗组沉积时期，剖面上主要分布在大磨拐河组和南二段，平面上仅分布在贝中和霍多莫尔2个油田，早期油藏形成过程中油富集主要受到3个方面因素的控制：源岩区控制着早期油气藏形成与分布的范围；反向断裂翘倾隆起和洼中隆是早期油气藏形成的有利部位；扇三角洲前缘亚相砂体为早期油气藏形成提供了储集空间。晚期油气藏形成过程油富集主要受到3个方面因素的控制：南一段源岩区控制着晚期油气藏形成与分布的范围；反转构造是晚期油气藏形成的有利部位；长期发育断裂为晚期油气藏形成提供了输导通道。
关键词：早期油藏；晚期油藏；形成过程；主控因素；贝尔凹陷
FU Guang, LI Hai-li
(College of Earth Science, Northeast Petroleum University, Daqing 163318, China)
Abstract:To study the forming procession of oil and gas reservoirs and main controlling factors of oil accumulation in Beier Depression, by using fluid inclusion homogenization temperature and Ar and K isotope dating of authigenic illites, combined with burial history and thermal history, oil and gas reservoirs are divided into oil and gas reservoirs formed in early period and oil and gas reservoirs formed in late period. Oil and gas reservoirs formed in early period mainly formed in the end of K1y sedimentary period, on section they mainly distribute in base rock, K1t and K1n1; on plane they distribute in Beizhong, Sudeerte, Huoduomoer and Huhenuoren. Oil and gas reservoirs formed in late period mainly formed in the end of K1y sedimentary period to K2q sedimentary period, on section they mainly distribute in K1d and K1n2; on plane they only distribute in Beizhong and Huoduomoer. Three different main controlling factors of oil accumulation for forming procession of oil and gas reservoirs formed in early period have been recognized: distributions of source rock control the formation and distribution of o, il and gas reservoirs formed in early period; tilting uplift formed by reverse fault and uplift in sag are the favorable place to form oil and gas reservoirs in early period; sand bodies of fan delta front provide accumulating place to form oil and gas reservoirs in early period. Three different main controlling factors of oil accumulation for forming procession of oil and gas reservoirs in late period are recognized: source rock zone in K1n1 controls the formation and distribution of oil and gas reservoirs formed in late period; reversal structure is the favorable place to form oil and gas reservoirs in late period; long-period developing faults provide passageway for oil and gas reservoirs formed in late period.
Key words:oil and gas reservoirs formed in early period; oil and gas reservoirs formed in late period; forming procession; main controlling factors; Beier Depression
