Abstract
Biot coefficient is one of the important parameters that describe the elastic deformability of pores in rocks. Numerical simulation is applied in this paper to study the effect of Biot coefficient on the in-situ stress field disturbance in the process of oil and gas production in low permeability oilfield. And study results reveal the effect of variations of Biot coefficient on the in-situ stress field disturbance in the process of oil and gas production in low permeability oilfield: the value of principal stress decreases with the increase of Biot coefficient; and the deflection angleof principal stress before and after production shows linear increase with the increase of Biot coefficient.
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