Research on slim-hole drilling technology for shale gas geological survey in China  

作　　者：Hongbo Zhao Haixia Wu Lina Shen Zhitong Zhu Yansheng Shan 

机构地区：[1]Oil and Gas Survey,China Geological Survey,Beijing,100083,China [2]Bejing Institute of Exploration Engineering,Beijing,100083,China [3]Institute of Exploration Techniques,Chinese Academy of Geological Science,Langfang,065000,China

出　　处：《Petroleum Research》2024年第3期451-461,共11页石油研究（英文）

基　　金：supported by project of China Geological Survey (Grant No.DD20230262,DD20221653,DD20221674,DD20190725,and DD20190561);the Science and Technology Innovation Fund of the Oil and Gas Survey (Grant No.[2023]-YC03).

摘　　要：Over the last 10 years,the China Geological Survey has deployed 137 slim-hole shale gas geological exploration wells for coring entire wellbores.These wells are primarily located in new blocks and geological formations where neighboring well data are insufficient,beyond the scope of developed oil fields in China,or outside of oil and gas company mining-right areas.The drilling rig equipment,coring tools,and core drill bits of slim-hole shale gas drilling technology are different from those associated with traditional petroleum drilling.Many studies have been conducted on non-coring slim-hole drilling technology.This paper focuses on coring technology and drilling safety,summarizing a set of high-efficiency shale gas drilling equipment and technology systems based on geological drilling equipment and techniques(that can be used for solid mineral exploration).We report on:1)an improved vertical shaft drilling rig adapted to shale gas well control safety;2)high-efficiency core drilling techniques,focusing on coring tools,and techniques incorporating an inverted tower drilling tool combination,air circulation follow-through technology,and expanded casing technology;3)research progress on high-efficiency core drill bits,including non-planar tooth polycrystalline diamond compact bits and impregnated diamond core bits,along with their application effects.This research provides substantial advances in drill-core technology and improvements in exploration efficiency.Moreover,it provides a reference frame for well structural design and selection of construction technology for shale gas exploration drilling projects.

关 键 词：Shale gas Slim-hole drilling technology Core drilling tools Core drill bits China 

分 类 号：TE24[石油与天然气工程—油气井工程]