逆冲推覆带古生界综合解释方法研究——以苏北LTQ三维为例
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摘要
建立了一套针对古生界逆冲推覆构造复杂变形区的综合物探解释方法流程,并在苏北LTQ地区获得成功应用。建立了逆冲推覆构造带的印支期前缘复杂区和后缘稳定区的构造样式格架;在推覆带构造地层分布模式指导下,通过井震结合标定了印支面、前志留面和前震旦基底的地震反射层;并通过重、磁、电、震联合验证了地质解释的可靠性。
A procedure of integrate interpretation method in Paleozoic thrusting nappe structure was formed and successfully applied in LTQ seismic survey of Subei area.A structural pattern including deformation region of front edge and stable region of trailing edge,which took place in Indosinian epoch,was established in the Paleozoic trust belt.Under the guidance of structural and stratigraphic distribution pattern in thrusting nappe structure,the seismic reflection of Indosinian plane,pre-Silurian plane and pre-Sinian plane were identified through wells and seismic survey.The certainty of geological interpretation was verified through the combination of gravity,magnetic,electric and seismic survey.
A procedure of integrate interpretation method in Paleozoic thrusting nappe structure was formed and successfully applied in LTQ seismic survey of Subei area.A structural pattern including deformation region of front edge and stable region of trailing edge,which took place in Indosinian epoch,was established in the Paleozoic trust belt.Under the guidance of structural and stratigraphic distribution pattern in thrusting nappe structure,the seismic reflection of Indosinian plane,pre-Silurian plane and pre-Sinian plane were identified through wells and seismic survey.The certainty of geological interpretation was verified through the combination of gravity,magnetic,electric and seismic survey.
引文
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[2]吴向阳,曾海东,金兴国,等.苏南SK1井钻探结果对下扬子区油气勘探的启示[J].石油勘探与开发,2000,26(5):5-7.
[3]马力,钱基,穆曰孔,等.苏北—南黄海盆地的构造演化和烃类生成[J].南京大学学报(地球科学),1993,(2):148-163.
[4]练铭祥,薛冰,杨盛良.苏北新生代盆地断陷和坳陷的形成机理[J].石油实验地质,2001,22(3):256-260.
[5]范小林,方成名,吕俊祥,等.苏北盆地深层古生界结构与海相油气勘探[J].石油实验地质,2008,29(5):435-444.
[6]杨琦,陈红宇.苏北—南黄海盆地构造演化[J].石油实验地质,2003,(S1):562-565.
[7]陈安定.用MT资料解释苏北地区海相残留地层分布[J].石油物探,2004,43(1):90-93.
[8]吴健生,王家林,于鹏,等.苏北及邻区前志留基础层的综合地球物理研究[J].勘探地球物理进展,2006,29(2):109-114.
[9]邱旭明.下扬子海相中、古生界地质结构特征及选区评价[J].江汉石油学院学报,2001,23(S1):13-15.
[10]曾萍.G78区域大剖面综合解释与苏北盆地构造特征[J].石油天然气学报,2007,28(3):82-86.
[11]郑华峰.苏北盆地印支面地震属性方向研究[J].复杂油气藏,2010,3(3):40-43.
[12]郭彤楼.下扬子地区区域磁异常和基底特征研究[J].石油天然气学报,2005,26(3):329-333.
[13]王巍,陈高,王家林,等.苏北南黄海盆地区域构造特征分析[J].地震学刊,1999,19(1):47-54.
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