中低孔隙度渗透率储层钻井液侵入规律研究

针对中低孔隙度渗透率储层钻井液侵入特征的研究较少,没有形成有效的规律性认识。提出了利用5岩心联测实验进行钻井液侵入规律研究的新思路,将动态联测实验数据与实际测井资料相结合,形成了中低孔隙度渗透率储层钻井液侵入规律认识。并建立了不同孔隙度渗透率条件下中低孔隙度渗透率储层钻井液侵入速率计算模型,进而得到钻井液侵入储层深度。在研究区进行了应用,为测井解释、射孔参数优化设计和压裂施工设计提供了指导性建议。

Drilling Fluid Invasion Law for Reservoir with Medium-low Porosity and Permeability

At present,there were few researches on the invasion characteristics of reservoirs with medium-low porosity and permeability,and no effective common understanding was formed.Based on the 5-cores-combined-test machine,a new method for the study of invasion law was proposed in this paper.This method combines the dynamic joint measurement experimental data with the actual logging data to form an law of the drilling fluid invasion for reservoirs with medium-low porosity and permeability.In addition,the calculation model for invasion rate of reservoir with medium-low porosity and permeability under different porosity and permeability conditions was also established,and the invasion depth of drilling fluid was obtained.The method has been applied in the research area,which provided guiding suggestions for logging interpretation and evaluation,optimization design of perforation parameters and fracturing construction design.