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肯吉亚克油田石炭系油藏属特低孔渗、异常高压碳酸盐岩油藏,它除了具有埋深大,非均质性强,油气成藏控制因素复杂等特点外,其上还覆盖巨厚盐丘,造成盐下地震反射时间和振幅畸变严重,地震成像差、信噪比低和分辨率低,给储层预测工作带来极大困难。如何正确预测油藏高产带分布规律是高效开发这类油藏的关键,本文研究从分析形成碳酸盐岩油藏高产带的主控因素入手,通过井震标定,优选反映碳酸盐岩岩相、岩溶、物性和裂缝的地震属性,结合地震、地质、测井、油藏工程和钻井资料,把盐下特低孔渗碳酸盐岩油藏高产带预测问题分解成构造解释、岩相预测、岩溶预测、物性预测、裂缝预测和综合评价等六个环节。宏观上,通过建立断裂、岩相、岩溶模式,定性预测储层分布有利区带;微观上,通过多参数储层特征反演和多属性综合分析,定量、半定量预测有利储层分布,有效解决盐下碳酸盐岩油藏高产带预测难题,基本搞清本区碳酸盐岩油藏高产带分布规律,为优选有利勘探和开发目标提供依据。文中提出的方法和技术对解决国内外碳酸盐岩油藏高产带预测和其他复杂储层预测问题有借鉴作用。
The Carboniferous reservoir of Kenjiac Oilfield belongs to the ultra-low porosity and anomaly high pressure carbonate reservoir. In addition to its characteristics of large buried depth, strong heterogeneity and complex controlling factors of hydrocarbon accumulation, Covering huge thick salt domes, resulting in serious seismic reflection time and amplitude distortion under salt, poor seismic imaging, low signal-to-noise ratio and low resolution, which bring great difficulties to reservoir prediction. How to correctly predict the distribution pattern of high-yield zones in oil and gas reservoirs is the key to the efficient development of such reservoirs. Starting with the analysis of the main control factors for forming high-yield zones in carbonate reservoirs, through well-bore calibration, it is preferable to reflect carbonate rock Phase, karst, physical properties and fractures, combined with the seismic, geologic, well logging, reservoir engineering and drilling data, the prediction problem of high-yield zone of ultra-low salt carbonate reservoir is decomposed into tectonic interpretation, lithofacies Prediction, prediction of karst, prediction of physical properties, prediction of cracks and comprehensive evaluation. In macroscopical view, the favorable zones of reservoir distribution are qualitatively predicted through the establishment of faults, lithofacies and karst modes. On the microcosmic level, the multi-parameter reservoir inversion and multi-attribute comprehensive analysis are used to predict the distribution of favorable reservoirs quantitatively and semi-quantitatively In order to solve the prediction problem of high production zone of carbonate subaqueous carbonate reservoirs, the distribution pattern of high production zones of carbonate reservoirs in this area is basically clarified, which provides the basis for the optimization of favorable exploration and development targets. The methods and techniques proposed in this paper can be used to solve the prediction of high-yield zones in carbonate reservoirs at home and abroad and other complex reservoir prediction problems.