石油钻采工艺2023，Vol.45Issue(4)：471-477,7.DOI:10.13639/j.odpt.202204058
沁南盆地冷冻煤储层压裂技术探索与实践
Explore and practice of cryogenic fracturing in coal reservoirs of Qinnan Basin
朱碧云 1樊崇建 2霍洪涛 1李城 1张忠玺 3齐守金1
作者信息
- 1. 中国石油华北油田山西煤层气分公司
- 2. 中国石油渤海钻探工程有限公司油气井测试分公司
- 3. 中国石油华北石油管理局有限公司江苏储气库分公司
- 折叠
摘要
Abstract
Reservoir stimulation of coal seams is one of the important techniques to increase the production of coalbed methane.However,due to the unique cleat system and lithologic characteristics of coal reservoirs,the conventional hydraulic fracturing technology is found inapplicable in field applications.Based on the characteristics of low temperature,high safety,adsorption partial pressure and phase-change pressurization of liquid carbon dioxide,the cryogenic fracturing technology of coal reservoirs with liquid carbon dioxide was developed.The first coal seam freezing test was performed in Well X150-1 of the Qinnan Basin.The field test shows that liquid carbon dioxide forms ice crystals and also temporary plugging to divert fractures and enable continuous fracture propagation.Compared with the production data of the adjacent well X150-2,the technology reflects the advantages of short desorption time and high gas production of a single well after transformation from the perspective of later drainage and production effects.From the long-term drainage effect,after the liquid level drops to near the coal seam in the later stage,the daily drainage of Well X150-1 is relatively high,indicating better gas production potential.This technology is an effective supplement and development of conventional hydraulic fracturing technology.关键词
冷冻煤层/冰晶暂堵/煤层气/压裂/二氧化碳Key words
coal seam freezing/temporary plugging by ice crystal/coalbed methane/fracturing/carbon dioxide分类
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朱碧云,樊崇建,霍洪涛,李城,张忠玺,齐守金..沁南盆地冷冻煤储层压裂技术探索与实践[J].石油钻采工艺,2023,45(4):471-477,7.
