苏北盆地中、上古生界分布预测
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摘要
苏北盆地中、上古生界具有很好的烃源岩条件。由于受多期构造运动的改造和地震资料的限制,因此,关于该地区中、上古生界的构造特征、分布和保存程度的认识一直存有争议。为了进一步了解印支面下伏中、上古生界在全区的分布状况,尝试应用正、反演方法对研究区内印支面上、下地层接触关系进行预测。利用钻井资料制作一维正演模型精确标定印支面,应用一维正演模型,沿印支面进行地震属性的提取、相关性分析和聚类分析,从有井控制区反演出无井控制区的印支面上、下地层接触关系。通过对黄桥地区地震属性的剖析,在该区选取均方根振幅和能量半衰时进行聚类分析,得到了印支面上、下地层接触关系平面分布特征,该反演结果与邻区衔接很好。
The Mesozoic and Upper Palaeozoic have good hydrocarbon source rocks in Subei basin.However,suffered from the limitation of the seismic data and the reconstruction of multi-period tectonic movements,distribution and preservation of the Mesozoic and Upper Palaeozoic are controversial for years.In order to understand the distribution of the underlying Mesozoic and Upper Palaeozoic in the work area,we tried to adopt forward and inversion technologies to predict the contact relationship of upper and lower formations of Indosinian unconformity.By using drilling data,1D forward model was established to accurately calibrate Indosinian unconformity. Then the 1D forward model was applied to carry out seismic attributes extraction,coherence analysis and cluster inversion.Finally, the contact relationship of upper and lower formations of Indosinian unconformity at the area without well data was inverted by that of the area with wells.By analyzing the seismic attributes at Huangqiao area,we selected RMS amplitude and energy half-attenuation time for cluster inversion,and obtained the plane distribution of the contact relationship of upper and lower formations at Indosinian unconformity.The result matches well with the neighboring area.
The Mesozoic and Upper Palaeozoic have good hydrocarbon source rocks in Subei basin.However,suffered from the limitation of the seismic data and the reconstruction of multi-period tectonic movements,distribution and preservation of the Mesozoic and Upper Palaeozoic are controversial for years.In order to understand the distribution of the underlying Mesozoic and Upper Palaeozoic in the work area,we tried to adopt forward and inversion technologies to predict the contact relationship of upper and lower formations of Indosinian unconformity.By using drilling data,1D forward model was established to accurately calibrate Indosinian unconformity. Then the 1D forward model was applied to carry out seismic attributes extraction,coherence analysis and cluster inversion.Finally, the contact relationship of upper and lower formations of Indosinian unconformity at the area without well data was inverted by that of the area with wells.By analyzing the seismic attributes at Huangqiao area,we selected RMS amplitude and energy half-attenuation time for cluster inversion,and obtained the plane distribution of the contact relationship of upper and lower formations at Indosinian unconformity.The result matches well with the neighboring area.
引文
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[16]李坦,殷小舟.地震属性的地质意义分析[J].复杂油气藏,2009(3):25-28,36
[2]柳广弟,李剑,李景明.天然气成藏过程有效性的主控因素与评价方法[J].天然气地球科学,2005,16 (1):1-6
[3]戴金星,邹才能,陶士振.中国大气田形成条件和主控因素[J].天然气地球科学,2007,18(4):473-484
[4]杨琦,谈彩萍,陈宏.苏北盆地油气富集与分布的主控因素[J].江苏地质,2006,30(4):241-248
[5]叶舟,梁兴,马力.下扬子独立地块海相残留盆地油气勘探方向探讨[J].地质科学,2006,41(3):523-548
[6]郭彤楼.下扬子地区中古生界叠加改造特征与多源多期成藏[J].石油实验地质,2004,26(4):320-322
[7]王杰,刘文汇,秦建中.苏北盆地黄桥CO_2气田成因特征及成藏机制[J].天然气地球科学,2008,19(6): 827-832
[8]刘东鹰,吴冬茹.断裂在盐城朱家墩气藏成藏中的作用[J].油气勘探与开发,2003,30(4):5-6,28
[9]刘东鹰.苏皖下扬子区中古生界油气勘探方向[J].江汉石油学院学报,2003,25(增刊下):46-47
[10]陆基孟.地震勘探原理[M].北京:石油大学出版社, 1983:242-246
[11]巫盛洪,李志荣,龙资强.沿层地震属性分析在川东北储层研究中的应用[J].物探化探计算技术,2003, 25(3):202-203
[12]王永刚,谢东,乐友喜,等.地震属性分析技术在储层预测中的应用[J].石油大学学报(自然科学版), 2003,27(3):30-32
[13]凌云研究组.基本地震属性在沉积环境解释中的应用研究[J].石油地球物理勘探,2003,38(6):642-653
[14]刘文岭,牛彦良,李刚.多信息储层预测地震属性提取与有效性分析方法[J].石油物探,2002,41(1): 101-103
[15]陈军.地震属性分析在储层预测中的应用[J].石油物探,2001,40(3):94-99,111
[16]李坦,殷小舟.地震属性的地质意义分析[J].复杂油气藏,2009(3):25-28,36
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