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- Title
中美典型高压页岩气藏钻井提速技术对比与启示.
- Authors
乔李华; 范生林; 齐 玉
- Abstract
The Haynesville high-pressure shale gas reservoir in America and the high-pressure shale gas reservoir of Lower Silurian Longmaxi Formation in the Changning–Weiyuan national shale gas demonstration area in China are similar in geological and drilling conditions. The technical ideas for improving the rate of penetration (ROP) in the Haynesville high-pressure shale gas reservoir provide an important reference for the fast drilling of shale gas wells in China. In order to realize ROP improvement of shale gas reservoirs in China, this paper compares the ROP improvement technologies us ed in the typical high-pres sure shale gas reservoir in China and in America, and analyzes and discusses the similarities and differences of ROP improvement technologies used in the Haynesville high-pressure shale gas reservoir in America and the high-pressure shale gas reservoir of Lower Silurian Longmaxi Formation in the Changning–Weiyuan national shale gas demonstration area in China. And the following research results were obtained. First, the hole size of the horizontal section in the Haynesville high-pressure shale gas reservoir is currently reduced from 215.9 mm to 171.5 mm or 161.1 mm, the single-well drilling investment is decreased by over 25%, showing an obvious advantage in energy conservation and emission reduction. Second, it is worthywhile for China to pay attention to, refer to, research and apply the ROP improvement technology of "efficient drilling bit + support downhole ROP improvement tool + drilling parameter optimization software/equipment" for high-abrasivity hard-to-drill formations used by American counterparts. Third, the drilling technology of "managed pressure drilling + density reduction" can play an important role in improving the ROP in high-pressure shale intervals. In conclusion, it is necessary to actively carry out exploratory tests on the reduced hole structure size and the application of related support drilling equipment, tool and software in the national shale gas demonstration areas of China, and explore, optimize and apply the managed pressure drilling technology continuously in the target intervals.
- Subjects
CHINA; UNITED States; SHALE gas reservoirs; GAS well drilling; OIL shales; ENERGY conservation; GAS reservoirs
- Publication
Natural Gas Industry, 2020, Vol 40, Issue 1, p104
- ISSN
1000-0976
- Publication type
Article
- DOI
10.3787/j.issn.1000-0976.2020.01.014