塔里木盆地和田河地区上奥陶统礁滩沉积体地震识别及其发育分布规律
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摘要
利用研究区钻井、测井和地震资料,通过良里塔格组礁滩组合体的地震地层学研究,总结出礁滩发育带的地震地质综合识别标志、初步圈定了分布范围,并建立退积式发育模式,进一步探讨构造古隆起、坡折带与礁滩发育带的关系及其发育分布规律。研究区碳酸盐岩台地及礁滩复合体的发育分布主要受古隆起控制,总体上呈北东向展布,内部发育北东、北西两个受局部隆起构造带控制的礁滩沉积相带,其中北东向浅滩发育带规模较大,向东延伸至塔中古隆起;受晚奥陶世早期持续海进影响,浅滩相带向古构造隆起顶部退积,平面分布范围向上缩小,良里塔格组中下部礁滩较发育,上部几乎不发育;由于研究区台地边缘带构造坡折幅度小,根据地震识别的礁滩沉积复合体可能主要是粒屑滩,台缘生物礁相对不发育。
Reef-bank bodies are favorable for developing carbonate reservoirs.By the study of seismic stratigraphy of Lanlitage Formantion through the data of drilling,well logging and seismic profiles in Hetian river area,the seismic indicators of reef-bank comolex were obtained,their distribution was described,and a retrograding model for the development of reef-bank complex was established.The analysis of the relationship between the reef-bank complex and paleo-uplift,as well as the edge of slope,indicates that the distribution of reef-bank complex was controlled by the paleo-uplift.The reef-bank complex generally distributed as belt along the axis of the paleo-uplift from SW to NE.Two sub-belts corresponded to local structural belt within the paleo-uplift was recognized,one is SW-NE,other one is SE-NW.The SW-NE is the main one,extending to Tazhong paleo-uplift.With the effect of successively rising of sea level in the early time of Later Ordovician,the reef-bank complex retrograded from the edge of platform to the top area of the paleo-uplift,so that their scope decreased upward,and they mainly occurred in the lower to middle para-sequences.As the slope was very flat,the reef-bank bodies detected from seismic profiles may be the banks mainly.It is not suitable for the development of reefs in this area.
Reef-bank bodies are favorable for developing carbonate reservoirs.By the study of seismic stratigraphy of Lanlitage Formantion through the data of drilling,well logging and seismic profiles in Hetian river area,the seismic indicators of reef-bank comolex were obtained,their distribution was described,and a retrograding model for the development of reef-bank complex was established.The analysis of the relationship between the reef-bank complex and paleo-uplift,as well as the edge of slope,indicates that the distribution of reef-bank complex was controlled by the paleo-uplift.The reef-bank complex generally distributed as belt along the axis of the paleo-uplift from SW to NE.Two sub-belts corresponded to local structural belt within the paleo-uplift was recognized,one is SW-NE,other one is SE-NW.The SW-NE is the main one,extending to Tazhong paleo-uplift.With the effect of successively rising of sea level in the early time of Later Ordovician,the reef-bank complex retrograded from the edge of platform to the top area of the paleo-uplift,so that their scope decreased upward,and they mainly occurred in the lower to middle para-sequences.As the slope was very flat,the reef-bank bodies detected from seismic profiles may be the banks mainly.It is not suitable for the development of reefs in this area.
引文
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[10]顾乔元,杨威,王清华.和田河气田奥陶系碳酸盐岩成岩作用及孔隙演化[J].成都理工学院学报,2001,28(4):90-95.
[11]杨威,魏国齐,王清华.和田河气田奥陶系碳酸盐岩储层特征及建设性成岩作用[J].天然气地球科学,2003,14(3):1-5.
[12]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.
[2]孔金平,刘效曾.塔里木盆地塔中5井下奥陶统隐藻类生物礁[J].新疆石油地质,1998,19(3):221-224.
[3]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.
[4]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.
[5]欧阳睿,焦存礼,白利华,等.塔里木盆地塔中地区生物礁特征及分布[J].石油勘探与开发,2003,30(2):33-36.
[6]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.
[7]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.
[8]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.
[9]蒋裕强,王招明.塔里木盆地和田河气田上奥陶统碳酸盐岩储层控制因素[J].天然气工业,2000,20(5):29-31.
[10]顾乔元,杨威,王清华.和田河气田奥陶系碳酸盐岩成岩作用及孔隙演化[J].成都理工学院学报,2001,28(4):90-95.
[11]杨威,魏国齐,王清华.和田河气田奥陶系碳酸盐岩储层特征及建设性成岩作用[J].天然气地球科学,2003,14(3):1-5.
[12]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.
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