汶川地震断裂带科学钻探一号孔（WFSD-1）不同取心方法的应用效果分析

Analysis on Application Results of Different Coring Methods in the Hole WFSD-1 of Wenchuan Earthquake Fault Scientific Drilling Project

摘要:

针对因地震造成的复杂地层，在汶川地震断裂带科学钻探一号孔（WFSD-1）钻探施工中，为了保证岩心的采取率和原状性，满足地震机理研究需要，长孔段采用多型号多规格半合管取心工艺技术，确保全孔岩心采取率高达94.3%及岩心原状性好的目的，从而满足了汶川地震地学研究的需要。

Abstract:

Multi-type and multi-size split barrel coring technology were used in the hole WFSD-1 of Wenchuan earthquake fault scientific drilling project to ensure high core recovery rate and keep the cores in original state even in very complicated formation conditions. As a result, 94.3% of core recovery was achieved and the cores were in good original state, which meet the requirement of geo-scientific research.