天然气地球科学 ›› 2021, Vol. 32 ›› Issue (5): 772780.doi: 10.11764/j.issn.1672-1926.2021.02.003
• 天然气勘探 • 上一篇
Cheng CHEN(),Yu QI,Zi-liang YU,Bo WANG
摘要:
稀井网、大井距条件下进行地下砂体的刻画与表征是油气田开发初期的难点。以地震资料为主导,通过井震结合,利用波形指示反演技术,对鄂尔多斯盆地东缘临兴S区上石盒子组浅水三角洲分流河道砂体的边界及叠置关系进行识别,明确分流河道的叠置关系及其影响因素。研究表明:分流河道叠置类型受控于A/S值和河道能量,在地震剖面上识别出强能独立砂体、高能侧向切割砂体、垂向切叠砂体及高能叠置砂体4类高能叠置关系的砂体和低能叠置砂体、低侧向拼接砂体、低能孤立砂体3类低能叠置关系的砂体。与低能环境下发育的砂体相比,高能环境的砂体规模较大,物性较好,优质储层易发育。利用该方法进行砂体叠置关系识别,能有效地为砂体和气藏的预测提供依据,从而指导井网部署。
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