鲁东地层岩性圈闭储层预测中的难点与对策
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摘要
吐哈盆地库木凸起前缘综合地质研究与钻探表明,鲁东地区二叠系仓房沟群和侏罗系七克台组两套主要目的层上超下削,与英也尔鼻隆背景配套形成大型地层-岩性稠油油藏。文章针对该区二叠系近源沉积体系快速变化的沉积相带空间展布和七克台组薄砂层储层预测的难点进行了综合分析,提出了相应的技术对策。通过确定敏感性强的岩石物理参数,运用地震属性分析、地震波阻抗及测井特征曲线反演技术,并结合沉积微相,对本区优质储层及目标砂体的分布进行了预测,搞清了等时层序地层格架内储集层砂体的沉积规模、几何形态、空间分布,并进一步对储层物性进行评价,经钻探证实预测结果的可信度较高。
Comprehensive geology study and exploration of Kumu swell in Tuha basin indicates two sets of main target zones,Permian P_1 cf and Jurassic J_2q formation in Ludong area are overlapped upward and truncated downward, and formed huge stratigraphic-lithology viscosity reservoir with Yingye'er nose-type uplift setting.In this paper, space distribution of sedimentary facies belt with quickly variational Permian near-source sedimentary system and prediction difficulties of thin sandstone reservoir of J_2q formation in the area are comprehensively analyzed,and corresponding technical countermeasures are submitted.Preferable reservoir and target sandbody' s distribution in the area are predicted by determining petrophysical parameters with strong sensibility,using inversion technology about seismic attribute analysis and seismic wave impedance and logging characteristic curve,and combining sedimentary micro-facies in the area.Sedimentary scale,geometry configuration and space distribution of reservoir sandbody in isochronous sequence-stratigraphic framework are understood in order to further evaluate reservoir physical properties.It is proved that based on the exploration the reliability of predication results is high.
Comprehensive geology study and exploration of Kumu swell in Tuha basin indicates two sets of main target zones,Permian P_1 cf and Jurassic J_2q formation in Ludong area are overlapped upward and truncated downward, and formed huge stratigraphic-lithology viscosity reservoir with Yingye'er nose-type uplift setting.In this paper, space distribution of sedimentary facies belt with quickly variational Permian near-source sedimentary system and prediction difficulties of thin sandstone reservoir of J_2q formation in the area are comprehensively analyzed,and corresponding technical countermeasures are submitted.Preferable reservoir and target sandbody' s distribution in the area are predicted by determining petrophysical parameters with strong sensibility,using inversion technology about seismic attribute analysis and seismic wave impedance and logging characteristic curve,and combining sedimentary micro-facies in the area.Sedimentary scale,geometry configuration and space distribution of reservoir sandbody in isochronous sequence-stratigraphic framework are understood in order to further evaluate reservoir physical properties.It is proved that based on the exploration the reliability of predication results is high.
引文
[1]杨贵祥.基于调谐频率与分频处理的高分辨率反演技术.石油物探,2006,45(3):242-244.
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[2]李庆忠.走向精确勘探的道路.北京:石油工业出版社.
[3]凌云.测井与地震信息标定研究.石油地球物理勘探, 2004.39(1).
[4]栗维民.鲁克沁稠油成藏机理研究.吐哈油田公司研究院, 2006,9.
[5]杨谦.地震资料宽带约束反演方法及应用.石油物探, 1996,35.
[6]袁秉衡.应用地震技术研究储集层.北京:石油工业出版社, 1992.
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