And it can be proved that under the condition of complete alternation sampling, this new method can realize the accurate extraction of the phase angle of fundamental wave.

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The result has demonstrated that the established model mentioned in this article can be used to analyse the rule of reservoir crustal stress, rock morphotropy, fluid pressure, porosity and permeability alternation with time and interspace and its effect to production. The improvement of fracturing stimulation mechanism has settled a more complete theory base for optimizing fracturing program.

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