中文摘要：

采集川东北地区白垩系～二叠系地层岩石露头,利用国内现有设备开展常温与模拟地层环境条件下岩石力学性质测试与分析研究是解决我国南方海相复杂勘探区超深井钻井关键技术,即提高钻头破岩效率、钻井速度问题的急需。扼要介绍了试验研究目的意义与采集的岩样,简述了试验方案、试验装置、试样、试验获取的结果及试验数据的统计方法;详述依据统计结果进行深部地层岩石力学特征分析研究的方法和获取的相关定性定量结论,进行了基于超深井破岩的机制简要定性分析。通过测试与分析研究可知,岩石的力学性能直接与钻头的高效破岩密切相关。在温度、压力双重因素的作用下深部岩石力学性质产生的变化,致使以刮切破岩方式的钻头在深部地层破碎岩石更加困难,是超深井钻井速度不能大幅度提高的关键因素所在。通过试验与分析研究,获取了一整套在不同环境条件下岩石力学性能发生变化的定性、定量结论,将对深井、超深井钻井过程中钻头的高效破岩机制研究、新型钻头研制与选型提供技术支撑。

英文摘要：

In order to solve the key technology of ultra-deep well drilling-improving cutting efficiency and rate of penetration in marine facies complex exploration area of south China,it is required to collect outcrops of Northeast Sichuan area formation,test and analyze their rock mechanical characteristics at normal temperature and simulated downhole conditions with available apparatuses.The goal and meaning of the test and collected samples were briefly introduced.The experimental scheme,testing apparatus,samples,the results and data statistical method were stated.According to statistical results,the method for analyzing rock mechanical characteristics of deep formation and related qualitative and quantitative results acquired were presented in detail.And the rock breaking mechanism of ultra-deep well drilling was qualitatively analyzed.Research shows that by testing and analysis： the mechanical properties of the rock directly related rock breaking.Under the action of temperature and pressure factors,the deep changes in mechanical properties of rock result in rock broken of cut way to scrape more difficult in the deep strata of rock.This is the key factor of the ultra-deep drilling speed can not be greatly improved.Through this pilot study and analysis,access to a set of rocks mechanical properties under different environmental conditions.Changes in mechanical properties of the qualitative and quantitative conclusions will provide technical support for rock breaking mechanism,high-performance bit research and selection in deep and ultra deep drilling