东濮凹陷构造演化对浅层油气成藏的影响
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摘要
通过计算地层的剥蚀厚度、断层断距,分析了古近纪以后两个最主要时期的构造运动特征,将构造演化与浅层油气藏地化指标、包裹体均一温度、同位素测年等结果相结合,分析了新构造运动对油气生成、运移路径、成藏期次及时间的控制作用。研究认为:东濮凹陷新构造运动主要发生在东营组、明化镇组沉积末,运动以垂直升降为主,伴有弱的伸展断裂;两次构造运动控制了烃源岩的二次生烃和浅层油藏的二次充注;深部生成的油气运移至浅层依次经过了NE向基底断裂、东营组砂体、新近系EW向断层,新近系油气分布主要受EW向断层控制。
The present paper deals with the neotectonic movements in the Dongpu depression from the Palaeogene onwards on the basis of the calculation of erosion thickness and fault displacement,and the controls of the neotectonic movements on the generation,accumulation,migration and timing of the hydrocarbons by means of the examination of the tectonic evolution,geochemical signatures,homogenization temperatures of the inclusions,and isotopic dating.The neotectonic movements in the Dongpu depression took place at the end of the deposition of the Dongying and Minghuazhen Formations,respectively,and were dominated by vertical movements,with slightly extensional faulting.The two phases of neotectonic movements cited above are interpreted to control the secondary hydrocarbon generation in the source rocks and the second infilling in the shallow reservoirs.The hydrocarbons generated in the deeper reservoirs migrated upwards to the shallower reservoirs via the NE-trending basement faults,Dongying Formation sandstones and Neogene EW-trending faults.The Neogene hydrocarbons are mostly constrained by the EW-trending faults.
The present paper deals with the neotectonic movements in the Dongpu depression from the Palaeogene onwards on the basis of the calculation of erosion thickness and fault displacement,and the controls of the neotectonic movements on the generation,accumulation,migration and timing of the hydrocarbons by means of the examination of the tectonic evolution,geochemical signatures,homogenization temperatures of the inclusions,and isotopic dating.The neotectonic movements in the Dongpu depression took place at the end of the deposition of the Dongying and Minghuazhen Formations,respectively,and were dominated by vertical movements,with slightly extensional faulting.The two phases of neotectonic movements cited above are interpreted to control the secondary hydrocarbon generation in the source rocks and the second infilling in the shallow reservoirs.The hydrocarbons generated in the deeper reservoirs migrated upwards to the shallower reservoirs via the NE-trending basement faults,Dongying Formation sandstones and Neogene EW-trending faults.The Neogene hydrocarbons are mostly constrained by the EW-trending faults.
引文
[1]程秀申,陈发景,漆家福,等.东濮凹陷伸展连锁断层系统及其演化作用[J].现代地质,2010,24(4):735-744.
[2]陈书平,漆家福,王德仁,等.东濮凹陷断裂系统及变换构造[J].石油学报,2007,28(1):43-49.
[3]张克鑫,漆家福,赵衍彬,等.新生代东濮凹陷构造特征及演化[J].新疆石油地质,2007,28(6):714-718.
[4]范昌育,王震亮,李萍.新构造运动对东濮凹陷北部古近系烃源岩生烃的影响及其对浅层油气成藏的意义[J].石油与天然气地质,2010,31(3):386-393.
[5]秦文龙,崔军平.海拉尔盆地贝尔凹陷油气成藏期次分析[J].现代地质,2011,25(3):594-598.
[6]刘正华,陈红汉.琼东南盆地东部地区油气形成期次和时期[J].现代地质,2011,25(2):279-288.
[7]郭振华,陈红汉,赵彦超,等.利用储层流体包裹体确定鄂尔多斯盆地塔巴庙区块上古生界油气充注期次和时期[J].现代地质,2007,21(4):712-718.
[8]张永贵,张忠民,冯兴强,等.塔河油田南部志留系油气成藏主控因素与成藏模式[J].石油学报,2011,32(5):767-774.
[9]张有瑜,罗修泉.英买力沥青砂岩自生伊利石K-Ar测年与成藏年代[J].石油勘探与开发,2011,38(2):203-210.
[10]崔军平,任战利,陈玉林.海拉尔盆地贝尔凹陷热演化史与油气关系研究[J].沉积学报,2011,29(2):388-394.
[11]王显东,姜振学,庞雄奇.古油气水界面恢复方法综述[J].地球科学进展,2003,18(3):412-419.
[12]李贤庆,钟宁宁,王康东,等.柴达木盆地西部古近-新近系油气充注研究[J].新疆石油地质,2012,33(1):1-3.
[2]陈书平,漆家福,王德仁,等.东濮凹陷断裂系统及变换构造[J].石油学报,2007,28(1):43-49.
[3]张克鑫,漆家福,赵衍彬,等.新生代东濮凹陷构造特征及演化[J].新疆石油地质,2007,28(6):714-718.
[4]范昌育,王震亮,李萍.新构造运动对东濮凹陷北部古近系烃源岩生烃的影响及其对浅层油气成藏的意义[J].石油与天然气地质,2010,31(3):386-393.
[5]秦文龙,崔军平.海拉尔盆地贝尔凹陷油气成藏期次分析[J].现代地质,2011,25(3):594-598.
[6]刘正华,陈红汉.琼东南盆地东部地区油气形成期次和时期[J].现代地质,2011,25(2):279-288.
[7]郭振华,陈红汉,赵彦超,等.利用储层流体包裹体确定鄂尔多斯盆地塔巴庙区块上古生界油气充注期次和时期[J].现代地质,2007,21(4):712-718.
[8]张永贵,张忠民,冯兴强,等.塔河油田南部志留系油气成藏主控因素与成藏模式[J].石油学报,2011,32(5):767-774.
[9]张有瑜,罗修泉.英买力沥青砂岩自生伊利石K-Ar测年与成藏年代[J].石油勘探与开发,2011,38(2):203-210.
[10]崔军平,任战利,陈玉林.海拉尔盆地贝尔凹陷热演化史与油气关系研究[J].沉积学报,2011,29(2):388-394.
[11]王显东,姜振学,庞雄奇.古油气水界面恢复方法综述[J].地球科学进展,2003,18(3):412-419.
[12]李贤庆,钟宁宁,王康东,等.柴达木盆地西部古近-新近系油气充注研究[J].新疆石油地质,2012,33(1):1-3.