Application of array acoustic wave SVP technology in fracture identification of horizontal shale gas wells in the southern Sichuan Basin

doi:10.3969/j.issn.1006-6535.2025.02.007

Abstract

Abstract: Fracture serves as the important channel for the seepage of oil and gas, and their identification within shale reservoirs presents significant challenges. Considering the heterogeneity and propensity for natural fracture development in the Wufeng Formation and Longmaxi Formation shale reservoirs of the Southern Sichuan Basin, the SVP fracture processing technology has been utilized to identify information from array acoustic wave logging data, thereby assessing the degree of fracture development in the shale reservoirs. The study shows that: The array acoustic wave SVP processing results show a strong consistency with microseismic monitoring events. This technology is capable not only of evaluating the scale of fracture development in shale gas wells in the Southern Sichuan Basin but also, to some extent, assessing the correlation between fractures and the production capacity of shale gas wells. SVP analysis was conducted on four wells in the study area that had undergone production test, and the results indicated that wells with high reflection wave coefficients had higher gas production capabilities. This indicates that fractures can effectively communicate the reservoir modification volume, thereby enhancing the output of single wells. This study provides technical support for the evaluation of fractures in horizontal shale gas wells.

Key words: shale gas, fracture, array acoustic wave, reflected wave, reflected wave coefficient

CLC Number:

TE122

LIANG Xusheng. Application of array acoustic wave SVP technology in fracture identification of horizontal shale gas wells in the southern Sichuan Basin[J]. Special Oil & Gas Reservoirs, 2025, 32(2): 59-65.

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