CAJ | 학술논문

油气勘探实践表明，裂缝是油气的储存空间或运移通道，裂缝介质地震波场的研究越来越受到关注。实际地层中裂缝形成受多种因素控制，物理属性比较复杂，表现出强烈的各向异性。由于上覆地层的压力使得水平或低陡倾角裂缝存在较少，大多数为高陡倾角裂缝，利用线性滑动裂缝介质的等效理论将高陡倾角裂缝介质等效为横向各向同性介质，便于实际应用。本文采用各向异性弹性波旋转交错网格模拟方法对含裂缝介质单炮记录进行模拟与分析。结果表明：裂缝的存在相当于人为增加反射界面；裂缝密度越大，裂缝纵横比越小，裂缝充填物与背景介质弹性性质差别越大，引起的反射波能量变化越大。本文模拟结果为利用地震数据进行裂缝介质参数反演与储层识别及油气预测提供了依据。
유기감탐실천표명，렬봉시유기적저존공간혹운이통도，렬봉개질지진파장적연구월래월수도관주。실제지층중렬봉형성수다충인소공제，물리속성비교복잡，표현출강렬적각향이성。유우상복지층적압력사득수평혹저두경각렬봉존재교소，대다수위고두경각렬봉，이용선성활동렬봉개질적등효이론장고두경각렬봉개질등효위횡향각향동성개질，편우실제응용。본문채용각향이성탄성파선전교착망격모의방법대함렬봉개질단포기록진행모의여분석。결과표명：렬봉적존재상당우인위증가반사계면；렬봉밀도월대，렬봉종횡비월소，렬봉충전물여배경개질탄성성질차별월대，인기적반사파능량변화월대。본문모의결과위이용지진수거진행렬봉개질삼수반연여저층식별급유기예측제공료의거。
The practice of oil exploration proves that the fractures are the stor-age space of oil and gas and channels of them to move,thereby the wave-field of cracked media draws more and more attention.The actual fractured reservoir is influenced by many factors and its physical properties are complex,showing strong anisotropy.There only exist high dip-angle cracks because the pressure in the overlying strata makes only a few of horizontal or low dip angle cracks ex-ist.It will be convenient for the practical application if fracture reservoir is equivalent to HTI medium by linear slip theory.This paper simulated and ana-lyzed two-component records based on the anisotropic elastic wave rotated stag-gered grid modeling.The result shows that the existence of the crack is equiva-lent to increase the reflection interface artificially.The larger the crack density is,the smaller the aspect ratio is,the greater the difference between back-ground and fracture fillings is,and the larger the change caused by reflection wave energy is.The result provides a basis for the reservoir identification and prediction when using the seismic data.