冯小英,秦琛,刘慧,郭增强,王一惠,耿立英

• 1:华北油田公司地球物理勘探研究院
• 2:大庆油田有限责任公司第二采油厂

摘要(Abstract)：

煤层气地层中的陷落柱不利于煤层气的保存,又易引起井壁垮塌,影响钻井工程质量,尤其是水平井。陷落柱的存在严重制约了煤层气开发效率,因此准确判断尤其重要。以沁南东三维区为例,根据陷落柱在地震剖面上的特征,优选了分频相干、形态指数、方差体等地震属性,准确地预测了该区陷落柱的平面分布规律。与常规地震剖面圈定的30个直径100~300m陷落柱相比,应用分频相干、形态指数、方差体等属性技术,圈定直径20~0m的陷落柱达40个,修正了陷落柱的大小及形态。本区的精细解释结果为井位部署,尤其是水平井位部署提供了技术保障。在全区的200口开发井中,由于避开了陷落柱,使低效井比例由前期的28%降低到10%,有效提高了水平井质量及单井日产气量。

关键词(KeyWords)： 陷落柱;分频相干;形态指数;方差体;沁南东三维区

Abstract:

Keywords:

基金项目(Foundation): 中国石油重大科技专项“煤层气地球物理综合评价技术研究”(编号:2013E-2202)资助

作者(Author): 冯小英,秦琛,刘慧,郭增强,王一惠,耿立英

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