| 中国近海四分量地震资料解释及应用 |
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| 引用本文： | 张树林,姜立红.中国近海四分量地震资料解释及应用[J].海洋地质与第四纪地质,2001,21(4):111-116. |
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| 作者姓名： | 张树林 姜立红 |
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| 作者单位： | 中国海洋石油研究中心 |
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| 摘 要： | 莺歌海盆地中浅层存在大量的密度型、低速型和钙质型亮点，只有低速型亮点才是气藏亮点，单纯用纵波地震难以准确预测出亮点类型；莺歌海盆地中深层可能还存在中弱振幅型的气层，用纵波地震预测这种形式的气层也是很困难的。四分量地震可较好地解决上述问题。浅层气层的纵横波振幅比、速度比、泊松比远远低于水层和泥岩层，中深层气层的纵横波速度比和泊松比明显低于其它层。用纵横波地震参数比可较好地预测岩性和气藏。应用不同方向的转换横波的走时差异、准各向异性系数的大小及横向（Y）分量的转换横波的反射能量的强弱来预测地层岩石各向异性的强弱。总结出了一套适合于中国近海四分量地震勘探资料解释和应用的流程。四分量地震技术在改善莺歌海盆地的构造成像、浅层气层检测及岩石各向异性（裂隙预测）方面的效果是很好的。乐东8－1等构造中深层的储层发育，储盖组合和储层物性均较好，中深层的勘探前景是比较好的。
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| 关 键 词： | 四分量地震 纵横波速度比 泊松比 气层检测 岩性预测 各向异性 地震资料解释 |
| 文章编号： | 0256-1492(2001)04-0111-06 |
| 修稿时间： | 2001年4月24日 |
EXPLANATION AND APPLICATION OF 4-COMPONENT SEISMIC DATA FOR CHINA OFFSHORE AREAS |
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| ZHANG Shu lin,JIANG Li hong.EXPLANATION AND APPLICATION OF 4-COMPONENT SEISMIC DATA FOR CHINA OFFSHORE AREAS[J].Marine Geology & Quaternary Geology,2001,21(4):111-116. |
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| Authors: | ZHANG Shu lin JIANG Li hong |
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| Abstract: | In shallow strata of the Yinggehai basin,there are light spots of various types such as density type,low velocity type and calcareous type,and only the low velocity light spots represent gas pools.It is difficult to give exact prediction of light spot types if only P wave seismic techniques are used.And it is also very difficult to use the techniques to position intermediate weak amplitude type gas layers that are possible to exist in intermediate and deep strata in the basin.These problems can be well solved by making use of 4 component seismic techniques.P and S wave amplitude ratio,velocity ratio and Poisson ratio are much lower in shallow gas layers than in water and mudstone layers,and P and S wave velocity ratio and Poisson ratio are evidently lower in intermediate and deep gas layers than in any other layers.It is a good method to use P and S wave seismic parameter ratio to predict lithologic characters and gas pools.The levels of anisotropism of rocks are predicted on the basis of differences in travel times of transform S wave in different directions,coefficients of para anisotropism and reflecting energy of transform S wave of Y component.A circuit is worked out and is suitable to the explanation and application of 4 component seismic prospecting data for China offshore areas.The 4 component seismic techniques work well in tectonic imagery,shallow gas layer detection and anisotropism(fissure prediction).Intermediate and deep reservoirs(e.g.Anle 8 1)develop well and have good reservoir capping assemblages and favorable geophysical properties,and thus it can show that the intermediate and deep strata are good prospect areas. |
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| Keywords: | component seismic techniques P and S wave velocity ratio Poisson ratio gas layer detection lithologic prediction anisotropism |
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