地震谱分解方法在低阻油层储层预测中应用

发布时间：2018-06-06 23:43

本文选题：低阻油层 + 谱分解　；参考：《地球物理学进展》2017年05期

【摘要】：20世纪80年代以后,业界意识到了低阻油层的巨大勘探、开发潜力,于是开始了对低阻油层的研究,试图找到低阻油层勘探、开发的有效技术.由于低阻油层是指低测井电阻率油层,而电阻率与地震波阻抗没有物理的相关性,常规的储层预测软件和方法均无法有效预测低阻油层的储层分布,因此尽管经过30多年的研究,低阻油层的储层横向分布预测技术依然少有突破.本文通过地震谱分解的方法来开展低阻油层的储层预测,研究首先采用正演的方法证明地震谱分解方法对低阻储层预测的适用性;其次总结出目前业界应用较为广泛的8种地震谱分解方法的优、缺点及其适用的地质条件和储层类型;然后自主研发了8种地震谱分解方法的软件、多维相关的交互优选算法来进行谱分解方法和数据的降维处理,实现在不降低储层预测精度的同时大幅提高了利用谱分解方法预测低阻储层的效率.研究的储层预测、低阻油层预测和甜点预测结果均通过钻井和油田生产动态资料验证,效果良好.
[Abstract]:Since 1980s, the industry has realized the great exploration and development potential of low resistivity reservoir, so it began to study the low resistivity reservoir, trying to find the effective technology of exploration and development of low resistivity reservoir. Because low resistivity reservoir is a reservoir with low logging resistivity, and there is no physical correlation between resistivity and seismic wave impedance, conventional reservoir prediction software and methods can not effectively predict the reservoir distribution of low resistivity reservoir. Therefore, despite more than 30 years of research, there is little breakthrough in prediction technology of reservoir lateral distribution in low resistivity reservoir. In this paper, the seismic spectrum decomposition method is used to develop reservoir prediction of low resistivity reservoir. Firstly, the forward modeling method is used to prove the applicability of seismic spectrum decomposition method to low resistivity reservoir prediction. Secondly, it summarizes the advantages and disadvantages of the eight seismic spectrum decomposition methods which are widely used in the industry at present, and their suitable geological conditions and reservoir types, and develops the software of the eight seismic spectrum decomposition methods independently. The multi-dimension correlation interactive optimal selection algorithm is used to deal with spectral decomposition method and data dimension reduction, which can greatly improve the efficiency of using spectral decomposition method to predict low resistivity reservoir without reducing reservoir prediction accuracy. The results of reservoir prediction, low resistivity reservoir prediction and dessert prediction are verified by drilling and oilfield production performance data, and the results are satisfactory.
【作者单位】：中海石油(中国)有限公司湛江分公司;
【基金】：国家重大科技专项课题(2016ZX05024-006)资助
【分类号】：P618.13;P631.4

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