砾岩层地层可钻性分析方法探讨

New Study about Conglomerate Formation Drillability Analysis Method

地层可钻性是钻井设计与施工的重要参数之一,地层可钻性的准确获取对于正确选用破岩工具、减少井下复杂情况、优质高效安全钻井等方面都具有十分重要的意义。目前,对于一般地层,常用的地层可钻性获取方法是实验和测井资料法,但这些方法用于像砾岩层这样矿物组成复杂、具有严重的各向异性的地层,其可钻性的预测值往往偏差很大。在分析传统可钻性获取方法的基础上,结合国内外对可钻性获取方法研究的进展,进行针对砾岩层地层特点的可钻性分析方法探讨。

Formation drillability is one of the important parame- ters during the process of design and construction of drilling. To get exactly the formation drillability is of very great significance for correct selection of drilling tools, reducing the occurrence of complex down-hole situations and high quality and security drill- ing operation. At present, to the general formation, the forma- tion drillability can be gain from either log data or from laborato- ry core testing. But for rocks with complex mineral composition, such as conglomerates with significant anisotropic, their drilla- bility predicted by using the common methods values is often of large deviation. Based on the common methods and the develop- ment of domestic and international research on drillability, we will get deeper into the analysis of conglomerate formation drilla- bility.