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Prediction of the Ordovician fractured-vuggy carbonate reservoirs in Tahe oilfield
Author(s): 
Pages: 860-870,878
Year: Issue:  6
Journal: OIL & GAS GEOLOGY

Keyword:  溶洞发育带地球物理识别模式非均质性储层预测碳酸盐岩缝洞型储层奥陶系塔河油田;
Abstract: 塔河油田奥陶系碳酸盐岩油藏埋深在5 300 m以上,基质不具储集性,储集类型以裂缝、溶洞为主,油气受控于古岩溶缝洞,储层纵、横向非均质性强,地震信噪比、分辨率低,预测难度大.寻找和预测奥陶系缝洞发育带是塔河油田增储上产的关键.在储层成因机理研究的基础上,建立了碳酸盐岩缝洞型储层的成因预测模式, 为储层预测奠定了地质基础.针对塔河油田奥陶系储层的特点,建立了以叠前时间偏移和目标精细处理技术为核心的碳酸盐岩缝洞型储层精细成像技术,为储层预测提供了扎实的基础资料.通过储层标定和正演模拟分析,建立了碳酸盐岩缝洞型储层的地球物理识别模式,包括测井识别模式和地震识别模式,为储层识别和预测提供了依据.应用振幅变化率、相干体分析、波阻抗反演等技术,有效地预测了碳酸盐岩缝洞发育带.
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