岩性油气藏 ›› 2024, Vol. 36 ›› Issue (6): 5665.doi: 10.12108/yxyqc.20240606
张天择1, 王红军1, 张良杰1, 张文起1, 谢明贤2, 雷明2, 郭强3, 张雪锐3
ZHANG Tianze1, WANG Hongjun1, ZHANG Liangjie1, ZHANG Wenqi1, XIE Mingxian2, LEI Ming2, GUO Qiang3, ZHANG Xuerui3
摘要: 阿姆河右岸阿盖雷气田中上侏罗统卡洛夫—牛津阶碳酸盐岩储层勘探难度大、地震反射能量弱、地震资料信噪比低。以储层特征及岩石物理分析为基础,通过叠前道集优化处理、井-震联合低频阻抗建模以及叠前射线域弹性阻抗反演方法,对该地区含气储层进行了预测。研究结果表明:①阿盖雷气田中上侏罗统卡洛夫—牛津阶储层主要为台地前缘缓坡相碳酸盐岩,岩性主要为砂屑灰岩和生屑灰岩,储集空间以孔隙-裂缝型为主,具有低孔、低渗和非均质性强的特征;有效含气储层主要表现为低纵波阻抗、低剪切模量、低体积模量特征,剪切模量对含气储层的敏感程度最高。②通过预测剔除去噪,奇异值分解去噪和谱平衡能量补偿手段对叠前道集进行处理可以有效去除异常振幅等高频及随机噪音,提升有效信号强度并增强远偏移距AVO特征;井-震联合建模方法通过引入低频层速度解决因地震数据低频信息缺失而造成的反演多解性问题,提高了反演精度的同时有效表征了储层横向变化;叠前射线域弹性阻抗反演方法在研究区应用效果好,纵、横波阻抗反演体在纵、横向上均表现出较高的分辨能力,预测的含气储层厚度与测井解释的成果吻合度达85%以上,反演体显示气层的横向连续性较差,符合缓坡滩沉积特征。③研究区碳酸盐岩储层具有良好的勘探开发潜力,东部和西南部的未钻区域有多处明显的含气显示;上部Gap—XVhp段含气显示更好。
中图分类号:
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