Wellbore Engineering Technologies for Ultra-deep Oil and Gas Exploration: Challenges and Trend

• 来源期刊: 中国油气（英文版）
• 年，卷（期）: 2017,（1）
• 页码范围: 23-27
• 页数: 5页
• 语种: 英文

摘要

Ultra-deep formations hold abundant oil and gas resources.As the demand for oil and gas increases with economic development,more and more efforts are putting into the exploration and development of oil and gas reservoirs in deep formations around the world.In China,the exploration and development of deep oil and gas are pacing up,especially in ultra-deep formations in the Sichuan Basin,Tarim Basin and Ordos Basin.The reservoirs in these basins feature extremely large depth (over 7000 m),super high temperature (150℃-210℃),super high pressure (over 150 MPa),high acid gas content (H2S and CO2),strong heterogeneity,and multiple pressure systems,which pose a series of challenges to wellbore engineering technologies including drilling,drilling fluid,cementing,logging,and completion testing.Therefore,it is necessary to delve into core drilling and testing technologies for deep formations.