塔里木盆地上寒武统地震相及沉积相分析
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摘要
塔里木盆地范围广泛,单依靠钻井揭示和露头是无法对全盆埋藏较深的上寒武统地层的沉积特征进行定性分析和描述。针对盆地上寒武统地层地震相研究较少的现状,笔者通过覆盖全盆的600多条二维地震测线对地层的地震反射特征进行描述和总结,确定地震相和沉积相转换的关系。利用反射波的反射外形,内部构型,振幅,连续性和频率等地震反射特征,在上寒武统下丘里塔格组的反射中识别出了7种地震相,并将地震相转化为5种沉积相,确定了碳酸盐岩台地模式。本次研究显示塔里木西南地区和东部地区应该能发育良好的烃源岩,下一步的勘探重点应该在麦盖提地区。
Because of wide area of Tarim basin,we can not analyze and desribe the sedimentary characteristics of upper cambiran which buried deep if we only rely on the drilling results and distant.The research on seismic facies is not enough,so we disribed and summarized the reflectance signature in more six hundreds 2D seismics for confirming the relation between seismic and sedimentary facies.According to the characteristics of seismic reflection such as amplitude,continuity,interior structures and exterior shapes,7 seismic facise were recognized from seismic reflection in the upper Cambrian xiaqiulitage formation.We transformed the sedimentary facies into 5 seismic facies and confirmed the model of carbonate platform.The research showed that good hydrocarbon source rocks would be developed in the west-southern and eastern areas of Tarim.Markit area should be the important target regions.
Because of wide area of Tarim basin,we can not analyze and desribe the sedimentary characteristics of upper cambiran which buried deep if we only rely on the drilling results and distant.The research on seismic facies is not enough,so we disribed and summarized the reflectance signature in more six hundreds 2D seismics for confirming the relation between seismic and sedimentary facies.According to the characteristics of seismic reflection such as amplitude,continuity,interior structures and exterior shapes,7 seismic facise were recognized from seismic reflection in the upper Cambrian xiaqiulitage formation.We transformed the sedimentary facies into 5 seismic facies and confirmed the model of carbonate platform.The research showed that good hydrocarbon source rocks would be developed in the west-southern and eastern areas of Tarim.Markit area should be the important target regions.
引文
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[3]朱金富,于炳松,樊太亮等.沉积成岩环境对白云岩储层的影响[J].新疆地质,2009,27(1):43～48.
[4]Arthur H.Saller.Palaeozoic dolomite reservoirs inthe Permian Basin,SW USA;stratigraphic distribution,porosity,permeability and production[J].GeologicalSociety Special Publications,2004,235:309～323.
[5]张新海,王晓东,阳国进等.巴楚地区上寒武—下奥陶统丘里塔格群碳酸盐岩储层特征[J].地质力学学报,2002,8(3):257～264.
[6]马锋,顾家裕,许怀先等.塔里木盆地东部上寒武统白云岩沉积特征[J].新疆石油地质,2009,30(1):32～37.
[7]刘雁婷,傅恒等.塔里木盆地巴楚—塔中地区寒武系层序地层特征[J].岩性油气藏,2010,22(2):48～53.
[8]高志前,樊太亮等.塔里木盆地寒武—奥陶系碳酸盐岩台地样式及其沉积响应特征[J].2006,24(1):19～27.
[9]汤良杰.略论塔里木古生代盆地演化[J].1997,11(1):14～20.
[10]许效松,汪正江等.塔里木盆地早古生代构造古地理演化与烃源岩[J].地学前缘,2005,12(2):49～57.
[11]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.
[12]贾承造,张师本,吴绍祖等.塔里木盆地及周边地层[M].北京:科学出版社,2004.
[13]何登发,李德生.塔里木盆地构造演化与油气聚集[M].北京:地质出版社,1996.
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