四川盆地平桥南区页岩气水平井工程参数对产量的影响分析

doi:10.13809/j.cnki.cn32-1825/te.2021.03.018

Abstract

Abstract:

Large scale hydraulic fracturing of horizontal wells is one of the key technologies to realize the effective development of shale gas. The progress of engineering technology provides better conditions for large-scale fracturing of shale gas wells. In recent years, large-scale shale gas horizontal well fracturing has been carried out in southern Pingqiao Block by Sinopec East China Oil and Gas Company, but the correlation between horizontal well engineering parameters and production is not clear. Based on the engineering parameters and gas well production of 31 fractured wells in southern Pingqiao, their sensitivity analysis are carried out by linear regression of the field data. The results show that the drilling encounter rate of long horizontal section and high-quality shale “sweet spot” is the basis for achieving high production of gas wells. With the decrease of fracturing cluster number and fluid strength and the increase of sand strength, the gas well production shows an increasing trend, but the increase of gas well production slows down when the fracturing operation parameters reach a certain extent. Based on the above understanding, the optimal fracturing scale parameters of southern Pingqiao Block are preliminarily defined, which provides the basis for the further parameter optimization and development plan adjustment, and lays the foundation for the effective fracturing and development of shale gas wells in the adjacent areas of southern Pingqiao Block.

Key words: shale gas, engineering parameters, gas well yield, fracturing of horizontal well, South Pingqiao Block

CLC Number:

TE37

Tian WU. Influence of engineering parameters on production of horizontal shale gas wells in southern Pingqiao Block, Sichuan Basin[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(3): 422-427.

Figures/Tables 10

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Influence of engineering parameters on production of horizontal shale gas wells in southern Pingqiao Block, Sichuan Basin

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