Feasibility analysis and prospects of the application of interwell connection technology in the efficient development of dry hot rock

doi:10.3969/j.issn.1006-6535.2025.02.001

Abstract

Abstract: Dry hot rocks are rich in energy storage and represent a clean energy source. Interwell connection technology is one of the key technologies for the efficient development of dry hot rocks. To explore the applicability of interwell connection technology in dry hot rock development, the characteristics and challenges of drilling and completion technologies for dry hot rock interwell connections have been analyzed, and a summary analysis has been conducted on the drilling and completion technologies suitable for dry hot rock interwell connections. The study shows that steering tools and directional tools with a temperature tolerance of up to 175 ℃ have a certain practical foundation, while wellbore trajectory control technologies for higher temperatures are under development. Interwell connection technologies have been applied in coalbed methane and salt wells. Drilling fluids and circulation cooling technologies with temperature tolerance above 200 ℃ are widely used, and high-temperature, high-efficiency rock-breaking drill bits are relatively mature. However, the application of gas drilling and downhole acceleration tools is limited in dry hot rock formations. A complete set of completion technologies with a temperature tolerance of up to 200 ℃ is relatively mature. Future research directions include developing wellbore trajectory control technologies with higher temperature tolerance and control accuracy, researching precise interwell connection technologies suitable for high-temperature hard formations, investigating drilling fluid systems with higher temperature tolerance and stability, conducting research on drilling acceleration technologies for high-hardness, high-temperature dry hot rock formations, and further studying the compatibility of completion materials and accessories with dry hot rock formations. These research findings can provide references for the efficient application of interwell connection technology in dry hot rock development.

Key words: dry hot rock, interwell connection, trajectory control, completion technology

CLC Number:

TK52

LI Shichang, LIU Gonghui, ZHAO Yunfei, LI Jun. Feasibility analysis and prospects of the application of interwell connection technology in the efficient development of dry hot rock[J]. Special Oil & Gas Reservoirs, 2025, 32(2): 1-11.

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