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Influence of Drilling Fluid Components on Shear Strength at Cement-aquifuge Interface in Coalbed Methane Wells 被引量:1

Influence of Drilling Fluid Components on Shear Strength at Cement-aquifuge Interface in Coalbed Methane Wells
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摘要 The hydraulic fracturing is still an effective technology for the exploitation of coalbed methane (CBM). However, after the hydraulic fracturing operation, the high water cut or sudden water flooding of CBM well usually occurs due to upward migration of bottom water, which is called water channeling (water inrush). This problem has been severely limiting the hydraulic fracturing effect of CBM wells. Some studies show that the aquifuge and cement paste themselves will not crush under hydraulic fracturing pressure. Water channeling often occurs at cement- aquifuge interface (CAI). The hydraulic fracturing is still an effective technology for the exploitation of coalbed methane (CBM). However, after the hydraulic fracturing operation, the high water cut or sudden water flooding of CBM well usually occurs due to upward migration of bottom water, which is called water channeling (water inrush). This problem has been severely limiting the hydraulic fracturing effect of CBM wells. Some studies show that the aquifuge and cement paste themselves will not crush under hydraulic fracturing pressure. Water channeling often occurs at cement- aquifuge interface (CAI).
出处 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第4期1511-1512,共2页 地质学报(英文版)
基金 supported by the National Natural Science Foundation of China(grant No.41572142) the National Science and Technology Major Project of China(grant No.2017ZX05009003-003)
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