高精度三维地震技术在排2探区的应用
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摘要
准噶尔盆地排2块为勘探潜力较大的有利区带,以非构造油藏为主,二维地震测网密度大,无法精确识别描述圈闭,历经多年研究未获突破。为扩大勘探成果,进行高精度三维地震采集。采用小道距、高炮密度观测方式,提高了目的层的有效覆盖次数;采用小药量、小组合基距检波器组合,目的层主频由30Hz提高到了63Hz,有效频宽10～130Hz。研究发现了该块"类亮点"特征,配合拓频处理、多属性分析,地震资料的纵向分辨率明显提高,陆续发现16个岩性油气藏,建成年产原油能力达47×104t。
Pai 2 block in Junggar Basin has large exploration potential,and is mainly non-structural reservoir.2-D seismic network density can not accurately identify the description of traps,so years of research has not made a breakthrough.To expand the exploration result,high-precision 3-D seismic acquisition was carried out.Small trace,high shot density observation means was utilized to improve the effective coverage times of target layers.By the use of small dose,small geophone array length,the main frequency of target layers was increased from 30Hz to 63Hz,with effective bandwidth of 10-130 Hz.The study found that the "category highlights" feature of the block,with the extension of frequency processing and multi-attribute analysis,the vertical resolution of seismic data was improved significantly.Sixteen litholigic reservoirs have been recovered,with an annual output of crude oil capacity of 47×104t.
Pai 2 block in Junggar Basin has large exploration potential,and is mainly non-structural reservoir.2-D seismic network density can not accurately identify the description of traps,so years of research has not made a breakthrough.To expand the exploration result,high-precision 3-D seismic acquisition was carried out.Small trace,high shot density observation means was utilized to improve the effective coverage times of target layers.By the use of small dose,small geophone array length,the main frequency of target layers was increased from 30Hz to 63Hz,with effective bandwidth of 10-130 Hz.The study found that the "category highlights" feature of the block,with the extension of frequency processing and multi-attribute analysis,the vertical resolution of seismic data was improved significantly.Sixteen litholigic reservoirs have been recovered,with an annual output of crude oil capacity of 47×104t.
引文
[1]刘传虎.地震属性与非构造油气藏勘探[J].新疆石油地质,2005,26(5):485-488
[2]李庆忠.走向精细勘探的道路——高分辨率地震勘探系统工程剖析[M].北京:石油工业出版社,1994
[3]罗劲,庄新明,韩祥磊.准噶尔盆地车排子凸起沙湾组成藏主控因素[J].新疆石油地质,2008,29(1):45-47.
[4]张勇.油气藏地震正演模型与分析[M].北京:石油工业出版社,2010
[5]汪彩云.地震技术在车排子地区岩性油藏勘探中的应用[J].勘探地球物理进展,2009.32(4):280-285
[2]李庆忠.走向精细勘探的道路——高分辨率地震勘探系统工程剖析[M].北京:石油工业出版社,1994
[3]罗劲,庄新明,韩祥磊.准噶尔盆地车排子凸起沙湾组成藏主控因素[J].新疆石油地质,2008,29(1):45-47.
[4]张勇.油气藏地震正演模型与分析[M].北京:石油工业出版社,2010
[5]汪彩云.地震技术在车排子地区岩性油藏勘探中的应用[J].勘探地球物理进展,2009.32(4):280-285
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