CAJ | 학술논문

叠前地震反演是根据振幅随炮检距或入射角的变化规律所反映的地下岩性和孔隙流体性质，来预测油气和估计地层岩性参数的一项技术，但直接应用叠前地震反演的结果还存在反演的属性随着地层埋深的增加而存在明显的压实背景趋势的影响，以及分析描述储层孔隙内流体特征时，经常存在单个属性难以有效识别孔隙内流体类型的不足。泊松阻抗是由叠前地震反演结果推导出的属性，它将泊松比和密度两种属性融合为单一的泊松阻抗属性，其泊松阻抗属性有助于实现将含油气储层从围岩中进行有效分离，达到识别砂岩孔隙内流体的目的。将泊松阻抗作为一种新的油气检测地震属性应用于西非深水勘探区块的烃类检测中，其钻前预测与实钻结果完全一致，从而证实了泊松阻抗钻前预测油气的可靠性和准确性，取得了较好的应用效果，显示了泊松阻抗作为一种新的油气检测地震属性的独特作用。
첩전지진반연시근거진폭수포검거혹입사각적변화규률소반영적지하암성화공극류체성질，래예측유기화고계지층암성삼수적일항기술，단직접응용첩전지진반연적결과환존재반연적속성수착지층매심적증가이존재명현적압실배경추세적영향，이급분석묘술저층공극내류체특정시，경상존재단개속성난이유효식별공극내류체류형적불족。박송조항시유첩전지진반연결과추도출적속성，타장박송비화밀도량충속성융합위단일적박송조항속성，기박송조항속성유조우실현장함유기저층종위암중진행유효분리，체도식별사암공극내류체적목적。장박송조항작위일충신적유기검측지진속성응용우서비심수감탐구괴적경류검측중，기찬전예측여실찬결과완전일치，종이증실료박송조항찬전예측유기적가고성화준학성，취득료교호적응용효과，현시료박송조항작위일충신적유기검측지진속성적독특작용。
Amplitude versus offset or incidence angle variations phenomenon could reflect the properties of lithology and flu-id underground.Prestack seismic inversion is a technique using AVO to detect oil and gas distribution and calculate lithologic parameters of target formations.However,the results of prestack inversion are always influenced by the compaction trend which increases versus the buried depth.Moreover,one single attribute is difficult to identify the reservoir fluid type.poisson’s impedance is an attribute derived from prestack inversion results,which integrates poisson's ratio and density.It is useful to separate oil-bearing reservoir from background rock,thus,it could help to identify the fluid in sandstone pore.poisson impedance is used as a new seismic attribute to detect oil and gas in deep water exploration area in west-Africa,the results fit well with the drilling data,which verifies that poisson's impedance is a reliable and precise attribute and it plays a unique role in oil and gas detection.