Abstract: A method for predicting an evolution law of a rock mechanical stratum of a fractured reservoir is provided. A three-dimensional heterogeneous model of mechanical parameters of an intact rock is built by means of a core experiment, logging calculation and seismic inversion; a three-dimensional discrete fracture network geomechanical model is built by means of field observation; effects of fracture parameters on magnitudes and anisotropy of mechanical parameters of a fractured rock mass are analyzed by means of numerical simulation; and a paleo-stress field, and a fracture density and occurrence at different periods are simulated in successive cycles in combination with a relation between the fracture parameters of a reservoir and rock mechanical parameters as well as a stress field, and a migration law of the rock mechanical stratum under the control of a tectonic factor is interpreted.

Abstract: In a logging identification method for a small fault based on stress anisotropy and crustal stress types, a magnitude and direction of a current crustal stress are determined by means of logging calculation of the crustal stress, and a transformation location of a crustal stress type is determined; a development location of the small fault is determined according to the transformation location of the crustal stress type; and an included angle between the current crustal stress and the fault is determined according to an amplitude of variation of stress anisotropy. The present disclosure provides the logging identification method for a small fault based on stress anisotropy and crustal stress types. According to the method, prediction cost is low, operability is high, and a prediction result has a reference value for guiding exploration and development of a complex oil and gas reservoir and construction of a gas storage.

Abstract: A method for determining ambient light intensity includes: acquiring a plurality of light sensing integral values obtained by sampling light intensity with a predetermined light sensing collecting time window and a predetermined sampling frequency through a photosensitive element, wherein the light sensing collecting time window is greater than a screen blanking time of a terminal; determining a minimum light sensing integral value and a maximum light sensing integral value in the plurality of light sensing integral values; determining a light sensing integral value of a photosensitive element which corresponds to an ambient light according to the maximum light sensing integral value, the light sensing collecting time window, the minimum light sensing integral value and the screen blanking time; and determining the ambient light intensity according to the light sensing integral value of the photosensitive element which corresponds to the ambient light and a predetermined light intensity.

Abstract: A method for determining ambient light intensity includes: acquiring a plurality of light sensing integral values obtained by sampling light intensity with a predetermined light sensing collecting time window and a predetermined sampling frequency through a photosensitive element, wherein the light sensing collecting time window is greater than a screen blanking time of a terminal; determining a minimum light sensing integral value and a maximum light sensing integral value in the plurality of light sensing integral values; determining a light sensing integral value of a photosensitive element which corresponds to an ambient light according to the maximum light sensing integral value, the light sensing collecting time window, the minimum light sensing integral value and the screen blanking time; and determining the ambient light intensity according to the light sensing integral value of the photosensitive element which corresponds to the ambient light and a predetermined light intensity.