摘要
针对低孔隙度低渗透率储层非均质性强、孔隙结构复杂、岩性多样、油水关系复杂等特点,在异常地层压力成因机制认识的基础上,利用Eaton法计算地层孔隙压力。基于Eaton模型的地层孔隙压力评价方法在博兴洼陷低孔隙度低渗透率砂泥岩地层具有较好的适应性,预测结果精度高,能够满足实际工程需要。研究区Eaton幂指数C并非恒定常数,而是随深度呈指数关系增大。
In view of the distinguishing feature of low-porosity and permeability layer with strong aeolotropism, complex pore configuration, variegated lithology and complex relationship of oil and water, we use Eaton method to compute the formation pore pressure on the basis of recognizing the contributing factor of abnormal formation pressure. The analysis demonstrates： （1） The evaluation method about formation pore pressure based on Eaton model is perfectly adaptable to sand shale layer with low-porosity and permeability in Boxing Subsag, the predicted result with which is of high accuracy and can meet the need of logging operations; （2） Coefficient of compaction correction is an important parameter to prediction accuracy about formation pore pressure, when the limit of formation depth is big, the coefficient of compaction correction C is not a constant but exponentially increases with the depth.
出处
《测井技术》
CAS
CSCD
北大核心
2013年第2期169-172,共4页
Well Logging Technology
关键词
测井评价
地层孔隙压力
储层非均质性
压实趋势线
Eaton法
log evaluation, formation pore pressure, reservoir anisotropism, compaction trendline, Eaton method
