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Abstract / Description of output
Earthquake triggering data exhibit longrange spatiotemporal correlations of the powerlaw form C(l) ∼ l−α and anomalouslyslow temporal diffusion of the mean triggering distance of the form: 〈l〉 ∼ tH, with H < 0.5. We examine spatiotemporal correlations in subsurface effective stress state caused by fluid injection and extraction at well sites in a hydrocarbon reservoir using a multivariate statistical regression model, and observe longrange correlations in flow rate that cannot be caused by Darcy flow alone. Significantlycorrelated well pairs align with the directions of incipient horizontaldisplacement tensile and shear failure in the presentday stress field, while the contours of the first principal component of the regression matrix closely follow the macroscopic fault pattern in the main producing horizon. The correlation function for well pairs has a powerlaw form with α ≈ 0.5, and the mean correlation distance increases with H ≈ 0.33, implying a similar criticalpoint response to perturbations in effective stress as the earthquake data.
Original language  English 

Article number  L18308 
Pages (fromto)  15 
Number of pages  5 
Journal  Geophysical Research Letters 
Volume  33 
Issue number  18 
DOIs  
Publication status  Published  1 Sept 2006 
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Dive into the research topics of 'Longrange, criticalpoint dynamics in oil field flow rate data'. Together they form a unique fingerprint.Projects
 1 Finished

RESURGE : Recovery enhancement
UK industry, commerce and public corporations
1/11/06 → 31/01/10
Project: Research