四分量地震技术在LD8-3构造中深层高压气藏勘探中的应用
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摘要
采用四分量地震新技术对莺琼盆地进行详细研究。从分析岩心实验室测试数据、全波列测井数据和地震资料纵、横波地震参数及衍生参数的变化规律认识到 :含气岩心的刚性模量、纵横波速度比和泊松比比含盐水岩心的低得多 ,砂岩的纵横波速度比和泊松比比泥岩的低得多 ;当地层埋深超过 2 50 0m (属于中深层 )时 ,纵横波速度比、泊松比基本不受深度的影响。基于上述研究成果和对几口探井砂岩、泥岩及砂泥岩的泊松比统计 ,制作了莺歌海盆地中深层岩性和气层预测量版 ,并对LD8 3构造进行了岩性和气藏预测 ,结果展示出LD8 3构造的中深层存在多层气层 ,且物性优越 ,储盖条件好 ,具有很好的勘探前景。图5表 1参 8
The regularity of the seismic survey and its derivative parameters are studied. The information such as the core testing data, all waves well log information and seismic data are analyzed. For gas bearing core, the bulk modulus, V p / V s and Poisson ration are distinctly lower than those of the brine bearing core. The Velocity and Poisson ratio of sand are distinctly lower than that of shale. When burial depth is beyond 2,500m , the velocity and Poisson ratio are not influenced by the burial depth. The prediction graticule of the lithology and gas reservoirs in Yinggehai basin has been made. The method of predicting lithology and gas reservoirs is propounded. In this method, Poisson ratio is used. The lithology and gas reservoirs of LD8 3 structure are detected. The detecting result shows that exploration prospect of the medium deep beds of LD8 3 is very good.
The regularity of the seismic survey and its derivative parameters are studied. The information such as the core testing data, all waves well log information and seismic data are analyzed. For gas bearing core, the bulk modulus, V p / V s and Poisson ration are distinctly lower than those of the brine bearing core. The Velocity and Poisson ratio of sand are distinctly lower than that of shale. When burial depth is beyond 2,500m , the velocity and Poisson ratio are not influenced by the burial depth. The prediction graticule of the lithology and gas reservoirs in Yinggehai basin has been made. The method of predicting lithology and gas reservoirs is propounded. In this method, Poisson ratio is used. The lithology and gas reservoirs of LD8 3 structure are detected. The detecting result shows that exploration prospect of the medium deep beds of LD8 3 is very good.
引文
1 HH普济谬夫等(著),裘慰庭等(译).横波和转换波地震勘探.北京:石油工业出版社,1993.
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5 张树林,李绪宣.海上多波地震技术的新进展与新动向.物探化探计算技术,2000,(2):141～147.
6 张树林.地震波速度与储集层参数的关系.天然气勘探与开发,1991,(1):25～30.
7 杨宝俊等.勘探地震学资料解释的基础和应用.北京:地质出版社,1996.9.
8 张树林,李绪宣.多波地震地质层位对比方法研究.天然气地球科学,2000,(1):85～90.
2 张树林.横波地震基本理论的研究.地球科学进展,1991,(1):38～43.
3 DanbomSH ,etal..Shear waveexploration.SocietyofExplorationGeophysicists,1987,(1):50～61.
4 WiestB ,etal..Shear waveseismic.PRAKLA SEISMISAG ,1989,81～83.
5 张树林,李绪宣.海上多波地震技术的新进展与新动向.物探化探计算技术,2000,(2):141～147.
6 张树林.地震波速度与储集层参数的关系.天然气勘探与开发,1991,(1):25～30.
7 杨宝俊等.勘探地震学资料解释的基础和应用.北京:地质出版社,1996.9.
8 张树林,李绪宣.多波地震地质层位对比方法研究.天然气地球科学,2000,(1):85～90.
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