CAJ | 학술논문

延长油田区块位于鄂尔多斯盆地陕北斜坡东部延安单斜的中间部位，为研究天然气储层及储层中高含气分布区，2008年在延长油田区块内完成三维地震勘探344km2。本文对三维地震资料应用吸收系数、频谱分解、振幅衰减等地震属性进行流体识别试验。试验结果表明振幅衰减对含气层段异常响应相对敏感，吸收系数对高含气层段有一定反映。利用天然气储层各层段振幅衰减极大值，参考吸收系数剖面的高值层段，分析预测了三维区块含气概率高的平面分布区，2009年在预测的含气概率高分布区进行了探井验证，取得了比较理想的效果。
연장유전구괴위우악이다사분지협북사파동부연안단사적중간부위，위연구천연기저층급저층중고함기분포구，2008년재연장유전구괴내완성삼유지진감탐344km2。본문대삼유지진자료응용흡수계수、빈보분해、진폭쇠감등지진속성진행류체식별시험。시험결과표명진폭쇠감대함기층단이상향응상대민감，흡수계수대고함기층단유일정반영。이용천연기저층각층단진폭쇠감겁대치，삼고흡수계수부면적고치층단，분석예측료삼유구괴함기개솔고적평면분포구，2009년재예측적함기개솔고분포구진행료탐정험증，취득료비교이상적효과。
Yanchang block is located in the middle of Yanan single slope in eastern Shanbei slope, Ordos Basin. For researching the gas reservoir and gas-rich area in reservoir layers, 344 km2 3D seismic exploration have been completed in this area in 2008. In this paper, some fluid identification tests including seismic wave absorption coefficient study. seismic profile spectrum decomposition technique and seismic amplitude attenuation attribute have been made. The results of these tests indicate that seismic amplitude attenuation is sensitive for gas-bearing reservoirs and absorption coefficient is also sensitive only for gas-rich layers. Some high probability distribution zones of gas-rich have been analyzed and predicted by using the maximum value of seismic amplitude attenuation and referencing absorption coefficient profile. Several exploration bore holes were conducted at the zones for verifying predicted results, which produced a good conclusion in 2009.