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须家河组致密气储层随钻孔隙度计算方法探索
Exploration of Calculation Method for Porosity While Drilling in Tight Gas Reservoir of Xujiahe Formation
唐谢 唐家琼 杨琳 赵磊 阮聪
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作者单位:地质勘探开发研究院
中文关键字:碎屑岩 致密气 定量 随钻孔隙度 推导 反演 计算方法
英文关键字:clastic rock Tight Gas quantitative porosity while drilling deduction inversion calculation method
中文摘要:一直以来,须家河组致密气储层的随钻解释多是采用曲线法和交会法,依据特征曲线纵向变化或交会特征进行定性或半定量的解释。这些方法虽有一定的效果,但却只能发现储层,对于储层品质难以准确判断,且人为因素较大。就当前四川地区须家河组致密气的开发状况而言,单一的储层识别已无法满足随钻地质评价的需求,需要更具指向意义的随钻参数为钻井和导向决策提供更有价值的地质信息。本文中,以录井参数为基础,依据钻速方程推导出钻时校正方法,再结合区域数据反演出随钻孔隙度计算方法,为致密气储层孔隙度定量评价的实现提供了一种较有效的途径。
英文摘要:The while drilling interpretation of the tight gas reservoir of the Xujiahe Formation mostly has been adopted by the curve method and intersection method, and the qualitative or semi quantitative interpretation is carried out on the basis of the longitudinal change or intersectional characteristic of the characteristic curve. Although these methods have certain effects, they can only discover reservoirs without accurately judging the reservoir quality, and the human-made factors affecting is large. As for the current development of the tight gas in Xujiahe Formation of Sichuan area, the single reservoir identification cannot meet the requirement of while drilling geological evaluation and more valuable guiding geological parameters are required as the valuable geological information for drilling and guiding decision-making. In this paper, based on the logging parameters, the drilling time correction method is deduced according to the drilling rate equation, and then the porosity while drilling calculation method is performed by combining with the regional data, which provides a effective way for the quantitative evaluation of the porosity of tight gas reservoir.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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