塔中下奥陶统鹰山组不整合面的确定及其地质意义
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摘要
塔中地区下奥陶统鹰山组发育一期重要的不整合面,已在该不整合面中获得重要的油气勘探成果。采用不整合面法、地球物理方法、测井响应特征、洞穴砂泥质充填物的岩性和颜色特征以及微体古生物等资料的综合分析,并结合高精度地震储集体预测和评价成果,确认鹰山组大型岩溶不整合面在塔中斜坡区广泛分布,具有较好的成层性,且连通性较好,是有利的储集体。明确了塔中奥陶系碳酸盐岩油气成藏关键事件以及下奥陶统油气资源规模,重新认识了不整合面油气藏,进而形成了不整合面碳酸盐岩油气勘探的新思路,拓展了油气勘探新领域。
An unconformity exists in Yingshan formation of the Lower Ordovician in Tazhong area,in which significant breakthrough for petroleum exploration has been made.This paper restudies the unconformity by means of unconformity method,geophysics,logging response feature,lithology and colour of cavern sand and shale as well as microfossil information,combining with the results of high-accuracy seismic reservoir prediction and evaluation.It suggests that this large karst unconformity is widely distributed in Tazhong slope area,with good strati-fied and connected features,being as a favorable reservoir.This study elabrates the key event for hydrocarbon accumulation and petroleum resource extent of the Ordovician carbonate reservoir,hence re-understanding such an unconformity,forming its new strategic idea for carbon-ate reservoir exploration and extending new domain for petroleum prospecting.
An unconformity exists in Yingshan formation of the Lower Ordovician in Tazhong area,in which significant breakthrough for petroleum exploration has been made.This paper restudies the unconformity by means of unconformity method,geophysics,logging response feature,lithology and colour of cavern sand and shale as well as microfossil information,combining with the results of high-accuracy seismic reservoir prediction and evaluation.It suggests that this large karst unconformity is widely distributed in Tazhong slope area,with good strati-fied and connected features,being as a favorable reservoir.This study elabrates the key event for hydrocarbon accumulation and petroleum resource extent of the Ordovician carbonate reservoir,hence re-understanding such an unconformity,forming its new strategic idea for carbon-ate reservoir exploration and extending new domain for petroleum prospecting.
引文
[1]许志刚.塔里木盆地塔中地区奥陶系层序地层学及关键不整合界面特征研究[D].北京:中国地质大学(北京),2005.
[2]陈新军,蔡希源,纪友亮,等.塔中奥陶系大型不整合面与风化壳岩溶发育[J].同济大学学报(自然科学版),2007,35(8):1 122-1 127.
[3]贾承造.中国塔里木盆地构造特征与油气[M].北京:石油工业出版社,1997:279-283.
[4]刘韵,赵锡奎,李坤,等.塔中卡塔克隆起古生界主要不整合面与油气成藏关系[J].新疆石油地质,2009,30(6):683-685.
[5]张克银,艾华国,兰林英.碳酸盐岩顶部不整合面结构层及控油意义[J].石油勘探与开发,1996,23(5):16-19.
[6]李凌,谭秀成,陈景山,等.塔中北部下奥陶统鹰山组白云岩特征及成因[J].西南石油大学学报,2007,29(1):34-36.
[2]陈新军,蔡希源,纪友亮,等.塔中奥陶系大型不整合面与风化壳岩溶发育[J].同济大学学报(自然科学版),2007,35(8):1 122-1 127.
[3]贾承造.中国塔里木盆地构造特征与油气[M].北京:石油工业出版社,1997:279-283.
[4]刘韵,赵锡奎,李坤,等.塔中卡塔克隆起古生界主要不整合面与油气成藏关系[J].新疆石油地质,2009,30(6):683-685.
[5]张克银,艾华国,兰林英.碳酸盐岩顶部不整合面结构层及控油意义[J].石油勘探与开发,1996,23(5):16-19.
[6]李凌,谭秀成,陈景山,等.塔中北部下奥陶统鹰山组白云岩特征及成因[J].西南石油大学学报,2007,29(1):34-36.
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