摘要
国内外目前对复杂岩性储集层的评价研究大都局限于碳酸盐岩,针对花岗岩储集层的评价尤其是随钻快速识别与储集性能评价方法鲜有描述。首次引入功指数模型评价花岗岩储集层,通过对模型的深入分析,详细阐述了模型关键系数的调试、功指数趋势线的绘制以及功指数比值计算的具体步骤,并建立了基于功指数比值的随钻储集层定性识别方法。运用成像测井结果刻度功指数比值,建立了地层储集性能评价标准,实现了在钻进的同时对地层储集性能进行半定量评价,为预防井漏、井塌等工程风险提供参考。应用结果表明,在花岗岩储集层识别方面,与单一的钻时识别方法相比,本文所提出的方法在精度上有明显提升;对花岗岩储集性能评价结果与测井综合解释结果较为吻合,能够较好满足矿场要求。
The studies of complex lithology reservoir mostly was confined to carbonate rocks at home and abroad, and the researches aimed to granite reservoir evaluation, especially the method for estimation while drilling also lacked of systematization and quantification. This pa- per, for the first time, introduced work index model to assess granite reservoir. According to the in-depth analysis of the model, the concrete steps for debugging of key coefficients of the model, drawing of work index trend line and calculation of work index ratio were elaborated, thus establishing a qualitative reservoir identification method while drilling based on work index ratio. Meanwhile, by calibrating work in- dex ratio from the results of imaging logging, the evaluation criterion of reservoir property was established, achieving the semi-quantitative assessment while drilling for reservoir property for the purpose of providing certain references for preventing engineering risks such as leak- age and borehole collapse. The application results show that this method is more accurate than single drilling time recognition method for granite reservoir identification, and consistent with the comprehensive log interpretation results as required in field exploration.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2015年第2期228-233,共6页
Xinjiang Petroleum Geology
关键词
功指数
花岗岩储集层
随钻评价
工程录井
应用
work index
granite reservoir
evaluation while drilling
engineering logging
application
