塔北隆起区一间房组礁滩沉积体特征
|
摘要
塔北隆起区中奥陶统一间房组礁滩沉积体是目前塔河油田油气勘探向南扩展的重要目标,但由于礁滩沉积体通常隐伏于台地相大套石灰岩地层中,长期以来难以通过地震资料及已有的认识进行预测。文章利用钻井及三维地震资料,通过礁滩层地震标定,一间房组及其上下地层的地震相及沉积相分析,建立了坡折带、礁滩沉积体发育带的地震识别标志,阐明了古隆起与坡折带及礁滩沉积体的关系,并建立了相关地质模式。结果表明,对应于中奥陶世塔北古隆起的构造转折带发育的一间房组台内坡折带控制了礁滩沉积体的发育分布,位于该坡折带以北环绕古隆起呈带状分布的8个礁滩沉积体发育区块,将是下一步油气勘探的优选目标。
The reef flat deposits in Middle Ordovician Yijianfang Formation in Tahe uplifted zone are the main exploration targets in the southern Tahe oilfield. However, it is difficult to recognize them by using conventional seismic data and current knowledge as they are often embedded in thick platform limestone. Drilling and 3D seismic data are integrated to perform seismic calibration of reef flat horizons and analyze the seismic facies and sedimentary facies of Yijianfang Formation and the upper and lower formations. Seismic identification marks of slope break zone and development zone of reef flat are recognized, the relationships between paleohighs and slope break zone and reef flat deposits are discussed, and relevant geologic modes are established. The development and distribution of reef flat deposits are controlled by the intra-platform slope break zone in Yijianfang Formation, which corresponds to the structural transform zone in Middle Ordovician Tabei paleohigh. Eight blocks with reef flat deposits that are in zonal distribution around the paleohigh to the north of the slope break zone will be the targets of future exploration.
The reef flat deposits in Middle Ordovician Yijianfang Formation in Tahe uplifted zone are the main exploration targets in the southern Tahe oilfield. However, it is difficult to recognize them by using conventional seismic data and current knowledge as they are often embedded in thick platform limestone. Drilling and 3D seismic data are integrated to perform seismic calibration of reef flat horizons and analyze the seismic facies and sedimentary facies of Yijianfang Formation and the upper and lower formations. Seismic identification marks of slope break zone and development zone of reef flat are recognized, the relationships between paleohighs and slope break zone and reef flat deposits are discussed, and relevant geologic modes are established. The development and distribution of reef flat deposits are controlled by the intra-platform slope break zone in Yijianfang Formation, which corresponds to the structural transform zone in Middle Ordovician Tabei paleohigh. Eight blocks with reef flat deposits that are in zonal distribution around the paleohigh to the north of the slope break zone will be the targets of future exploration.
引文
[1]徐国强,刘树根,李国蓉,等.塔北塔中古隆起形成演化及油气地质条件对比[J].石油天然气地质,2005,26(1):114-119.
[2]肖传桃,蒋维东,潘云唐.塔里木盆地轮南地区奥陶纪生物礁[J].中国区域地质,1996(4):330-333.
[3]顾家裕,方辉,蒋凌志.塔里木盆地奥陶系生物礁的发现及其意义[J].石油勘探与开发,2001,28(4):1-3.
[4]张涛,闫相宾,王恕一,等.河油田奥陶系一间房组礁滩相溶蚀孔隙型储层特征与成因[J].石油天然气地质,2004,25(4):462-466.
[5]徐国强,李国蓉,刘树根,等.塔里木盆地早海西期多期次风化壳岩溶洞穴层[J].地质学报,2005,79(4):557-568.
[6]徐国强,刘树根,武恒志,等.海平面升降周期性变化与岩溶洞穴层序次关系探讨[J].沉积学报,2005,26(2):316-322.
[7]罗平,张兴阳,顾家裕,等.塔里木盆地奥陶系生物礁露头的地球物理特征[J].沉积学报,2003,21(3):423-427.
[8]朱忠德,刘秉理,王泽中.塔里木盆地北部中、晚奥陶世生物礁新发现[J].江汉石油学院学报,2000,22(3):110.
[9]邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域[J].石油学报,2005,26(1):27-31.
[10]BADLEY M E.Practical seismic interpretation[C].Li-brary of Congress catalogingin Publication Data,1985:104-110.
[11]陈景山,王振宇,代宗仰,等.塔中地区中上奥陶统台地镶边体系分析[J].古地理学报,1999,1(2):8-17.
[2]肖传桃,蒋维东,潘云唐.塔里木盆地轮南地区奥陶纪生物礁[J].中国区域地质,1996(4):330-333.
[3]顾家裕,方辉,蒋凌志.塔里木盆地奥陶系生物礁的发现及其意义[J].石油勘探与开发,2001,28(4):1-3.
[4]张涛,闫相宾,王恕一,等.河油田奥陶系一间房组礁滩相溶蚀孔隙型储层特征与成因[J].石油天然气地质,2004,25(4):462-466.
[5]徐国强,李国蓉,刘树根,等.塔里木盆地早海西期多期次风化壳岩溶洞穴层[J].地质学报,2005,79(4):557-568.
[6]徐国强,刘树根,武恒志,等.海平面升降周期性变化与岩溶洞穴层序次关系探讨[J].沉积学报,2005,26(2):316-322.
[7]罗平,张兴阳,顾家裕,等.塔里木盆地奥陶系生物礁露头的地球物理特征[J].沉积学报,2003,21(3):423-427.
[8]朱忠德,刘秉理,王泽中.塔里木盆地北部中、晚奥陶世生物礁新发现[J].江汉石油学院学报,2000,22(3):110.
[9]邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域[J].石油学报,2005,26(1):27-31.
[10]BADLEY M E.Practical seismic interpretation[C].Li-brary of Congress catalogingin Publication Data,1985:104-110.
[11]陈景山,王振宇,代宗仰,等.塔中地区中上奥陶统台地镶边体系分析[J].古地理学报,1999,1(2):8-17.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心