琼东南盆地二号断裂带坡折区速度研究进展
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摘要
琼东南盆地二号断裂带是构造分区的标志性断层之一,该断裂带下降盘为中央凹陷带。区域研究表明中央凹陷带具有良好的生烃潜力,所以该区带一直被认为是有利的油气勘探区带。但是由于该区带水深剧烈变化,多期坡折带快速推进沉积形成大套泥岩,使得该区带的速度很难确定,所以速度问题成为制约着琼东南盆地坡折带勘探的难点问题。笔者首先分析现有速度谱的质量,了解速度整体变化趋势;其次考虑已钻井的速度分析结果;结合地震剖面地层的变化信息进行速度解释,采用解释能量团中心的标准进行速度解释;最后在精细速度解释的基础上,对二维剖面正演模型速度进行分析,建立速度体,证实构造目标的存在。
Qiongdongnan basin fault zone is one of the marker faults for fault partition and one of the central depression downthrown fault zones.Regional studies show that the central depression has a good hydrocarbon potential,so the area has been considered to be a favorable oil and gas exploration area.However,due to the formation of large sets of deposited shale resulting from drastic changes and rapid progress of water depth and slope,it is difficult to determine the velocity in this area,so the velocity problem constrains the exploration of the slope break in Qiongdongnan basin and becomes a difficult problem.In this study,the authors first analyzed the quality of the speed spectra available so as to understand the overall variation trend of the velocity,followed by considering the velocity obtained by drilling results;in combination with stratigraphic variation information,the velocity interpretation was carried out,and the energy in the center was used to explain the standards of velocity interpretation.Finally,on the basis of careful velocity interpretation,the forward model of two-dimensional velocity profile analysis confirmed the existence of a target structure.
Qiongdongnan basin fault zone is one of the marker faults for fault partition and one of the central depression downthrown fault zones.Regional studies show that the central depression has a good hydrocarbon potential,so the area has been considered to be a favorable oil and gas exploration area.However,due to the formation of large sets of deposited shale resulting from drastic changes and rapid progress of water depth and slope,it is difficult to determine the velocity in this area,so the velocity problem constrains the exploration of the slope break in Qiongdongnan basin and becomes a difficult problem.In this study,the authors first analyzed the quality of the speed spectra available so as to understand the overall variation trend of the velocity,followed by considering the velocity obtained by drilling results;in combination with stratigraphic variation information,the velocity interpretation was carried out,and the energy in the center was used to explain the standards of velocity interpretation.Finally,on the basis of careful velocity interpretation,the forward model of two-dimensional velocity profile analysis confirmed the existence of a target structure.
引文
[1]蔡刚,屈志毅.构造复杂地区地震资料速度和成图方法研究与应用[J].天然气地球科学,2005,16(2):246-249.
[2]陈欢庆,朱筱敏,张功成,等.琼东南盆地深水区古近系陵水组输导体系特征[J].地质学报,2010,84(1):138-148.
[3]陈瑜,魏赟,葛勇.东海盆地L凹陷多次波分析与压制[J].中国海上油气:地质,2004,16(6):373-376.
[4]姜华,王华,肖军等.应用古地貌分析方法进行有利区带预测——以琼东南盆地②号断裂带为例[J].石油勘探与开发,2009,36(4):436-441.
[5]何云龙,解习农,李俊良,等.琼东南盆地陆坡体系发育特征及其控制因素[J].地质科技情报,2010,29(2):118-122.
[6]刘爱群,童传新,李林.莺东斜坡带速度分析方法研究及速度影响因素分析[J].地球物理学进展,2008,23(06):1909-1917.
[7]刘江平,杨永清,李修忠.复杂地形条件下地震速度提取方法及分析[J].物探与化探,1999,23(4):259-264.
[8]刘启凤.地震资料成像和构造成图中速度的分析与应用[J].江汉石油大学学报,2003,17(4):52-54.
[9]刘天佑,黎益仕,师学明.地层压力预测方法及其在莺歌海盆地的应用[J].中国海上油气(地质),1995,9(5):333-339.
[10]孟庆生,楚贤峰,郭秀军,等.高分辨率数据处理技术在近海工程地震勘探中的应用[J].地球物理学进展,2007(3):1006-1010.
[11]田世澄,陈永进,施凤成,等.异常压力封存箱在油气成藏中的作用[J].地学前缘,2004,11(3):283-284.
[12]谢瑞杰,朱广生,漆家福,等.声波测井资料在速度场中的应用[J].西南石油学院学报,2003,25(1):9-12.
[13]王立明,李庆春.选择相关法提高转换波速度分析精度[J].地球物理学进展,2006,21(4):1213-1220.
[14]王德利,何樵登,韩立国.裂隙各向异性介质中的NMO速度[J].地球物理学进展,2007,22(6):1698-1705.
[15]叶勇,孙开峰.密点速度分析技术在塔河油田西南部低幅构造中的应用[J].地球物理学进展,2008,23(1):124-128.
[16]于俊峰,孙志鹏,朱继田.琼东南盆地松南凹陷新生代重要构造幕及表现形式[J].天然气地质科学,2010,21(2):281-288.
[17]张发强,王震亮,吴亚生,等.消除影响压实趋势线地质因素的方法[J].沉积学报,2002,20(2):326-332.
[18]张鸿烈,邓金华.用地震速度谱信息寻找地下油气藏的方法[J].石油地球物理勘探,1996,31(2):53-59.
[19]张印堂.渤深6地区高精度处理技术[J].地球物理学进展,2005,20(1):49-53.
[20]赵民,张晓宝,吉利明,等.琼东南盆地构造演化特征及其对油气藏的控制浅析[J].天然气地质科学,2010,21(3):494-502.
[2]陈欢庆,朱筱敏,张功成,等.琼东南盆地深水区古近系陵水组输导体系特征[J].地质学报,2010,84(1):138-148.
[3]陈瑜,魏赟,葛勇.东海盆地L凹陷多次波分析与压制[J].中国海上油气:地质,2004,16(6):373-376.
[4]姜华,王华,肖军等.应用古地貌分析方法进行有利区带预测——以琼东南盆地②号断裂带为例[J].石油勘探与开发,2009,36(4):436-441.
[5]何云龙,解习农,李俊良,等.琼东南盆地陆坡体系发育特征及其控制因素[J].地质科技情报,2010,29(2):118-122.
[6]刘爱群,童传新,李林.莺东斜坡带速度分析方法研究及速度影响因素分析[J].地球物理学进展,2008,23(06):1909-1917.
[7]刘江平,杨永清,李修忠.复杂地形条件下地震速度提取方法及分析[J].物探与化探,1999,23(4):259-264.
[8]刘启凤.地震资料成像和构造成图中速度的分析与应用[J].江汉石油大学学报,2003,17(4):52-54.
[9]刘天佑,黎益仕,师学明.地层压力预测方法及其在莺歌海盆地的应用[J].中国海上油气(地质),1995,9(5):333-339.
[10]孟庆生,楚贤峰,郭秀军,等.高分辨率数据处理技术在近海工程地震勘探中的应用[J].地球物理学进展,2007(3):1006-1010.
[11]田世澄,陈永进,施凤成,等.异常压力封存箱在油气成藏中的作用[J].地学前缘,2004,11(3):283-284.
[12]谢瑞杰,朱广生,漆家福,等.声波测井资料在速度场中的应用[J].西南石油学院学报,2003,25(1):9-12.
[13]王立明,李庆春.选择相关法提高转换波速度分析精度[J].地球物理学进展,2006,21(4):1213-1220.
[14]王德利,何樵登,韩立国.裂隙各向异性介质中的NMO速度[J].地球物理学进展,2007,22(6):1698-1705.
[15]叶勇,孙开峰.密点速度分析技术在塔河油田西南部低幅构造中的应用[J].地球物理学进展,2008,23(1):124-128.
[16]于俊峰,孙志鹏,朱继田.琼东南盆地松南凹陷新生代重要构造幕及表现形式[J].天然气地质科学,2010,21(2):281-288.
[17]张发强,王震亮,吴亚生,等.消除影响压实趋势线地质因素的方法[J].沉积学报,2002,20(2):326-332.
[18]张鸿烈,邓金华.用地震速度谱信息寻找地下油气藏的方法[J].石油地球物理勘探,1996,31(2):53-59.
[19]张印堂.渤深6地区高精度处理技术[J].地球物理学进展,2005,20(1):49-53.
[20]赵民,张晓宝,吉利明,等.琼东南盆地构造演化特征及其对油气藏的控制浅析[J].天然气地质科学,2010,21(3):494-502.
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