预测郭局子洼陷灰岩储层的两种有效地震属性
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摘要
郭局子洼陷南坡沙四段灰岩发育,是该区主要的产油层,灰岩储层类型主要为孔隙和裂缝型。该套灰岩在地震剖面上表现为强反射,仅仅利用常规地震属性难以有效地把灰岩厚度横向变化和灰岩储层发育区反映出来。应用分频振幅属性预测灰岩厚度和展布,应用瞬时频率属性预测储层的孔缝发育带,预测结果与已完钻井吻合很好。评价认为,在目前勘探程度较低的洼陷南部缓坡带,灰岩储层厚度较大、孔缝发育、储集性能较好,具有较大的勘探潜力。
In Guojuzi sag, limestone, which is the main pay bed in this region, is developed in the south slope. Though the limestone is manifested by strong reflection, it is hard to determine the lateral variations of limestone thickness and limestone reservoirs simply by conventional seismic attributes. This paper proposed to determine the thickness and distribution of limestone by frequency division amplitude and the fracture zone by instantaneous frequency. The predicted results are in good agreement with drillings. It is concluded that the south slope that has been poorly explored is a favorable prospect. The limestone is thick and fractured, and its reservoir property is favorable.
In Guojuzi sag, limestone, which is the main pay bed in this region, is developed in the south slope. Though the limestone is manifested by strong reflection, it is hard to determine the lateral variations of limestone thickness and limestone reservoirs simply by conventional seismic attributes. This paper proposed to determine the thickness and distribution of limestone by frequency division amplitude and the fracture zone by instantaneous frequency. The predicted results are in good agreement with drillings. It is concluded that the south slope that has been poorly explored is a favorable prospect. The limestone is thick and fractured, and its reservoir property is favorable.
引文
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2杨占龙,彭立才,陈启林,等.地震属性分析与岩性油气藏勘探[J].石油物探,2007,46(2):131~136
3张宏.地震谱分解算法对比与局限性分析[J].勘探地球物理进展,2007,30(6):409~416
4叶泰然,苏锦义,刘兴艳.分频解释技术在川西砂岩储层预测中的应用[J].石油物探,2008,47(1):72~76
5夏竹,刘兰锋,任敦占,等.基于地震道时频分析的地层结构解析原理和方法[J].石油地球物理勘探,2007,42(1):57~65,69
6林承焰,张宪国,董春梅.地震沉积学及其初步应用[J].石油学报,2007,28(2):69~72
7马伯林,陆明华,舒福明,等.地震属性分析在碳酸盐岩储层研究中的应用[J].小型油气藏,2007,12(1):32~35
8杨子川.塔河油田碳酸盐岩储层预测技术与应用[J].勘探地球物理进展,2004,27(6):432~439
9马伯林.地震属性分析在块碳酸盐岩储层研究中的应用[J].安徽地质,2007,17(1):40~45
10张进铎,杨平,王云雷.地震信息的谱分解技术及其应用[J].勘探地球物理进展,2006,29(4):235~239
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