随钻测井技术在页岩气钻井中的应用

我国页岩气钻井存在着较高的风险,主要问题是"甜点"钻遇率低、井壁坍塌问题严重、钻井周期长、经济效益差。利用随钻测井技术,可进行页岩岩石力学与油层物理特征分析、建立地层应力和三压力剖面、确定储层"甜点"、并指导地质导向作业,能减少页岩气钻井的井壁失稳问题、缩短钻井周期、降低钻井风险、提高钻井效率。文章总结了北美地区进行页岩气钻井时利用随钻测井技术解决页岩气钻井难题的方法,我国应借鉴北美经验,大力开展页岩气随钻测井技术和工具的研发,提高随钻测井技术在页岩气钻井中的应用程度,实现页岩气开发中的安全高效钻井。

APPLICATION OF LWD TECHNOLOGY IN SHALE GAS DRILLING

In China,drilling practice of shale gas development have some risks,of which are the missing of sweet spots,serious borehole collapsing,long cycle of drilling operations,and poor economic benefit.With the using of LWD technology,the rock mechanics and physicals of shale reservoir could be analyzed,the profile of in-situ stress and"three pressure"could be established,"sweet spot"could be determined.At the same time,the LWD technology could reduce borehole collapsing and drilling risks,shorten the cycle of drilling operations,improve drilling efficiency.The paper summarized the methods to solve shale gas drilling problems with LWD technology in North America area,put forward some suggestions on research and development of LWD technology and tools in China,and the applications of LWD technology in shale gas drilling should be enhanced to realize safe and efficient drilling in shale gas.