Patent ID: 8868348

Claim:
A method for determining a location of a petroleum reservoir based on a seismic wave velocity field, the seismic wave velocity field being established based on a well-constrained transverse variable H-V curve, wherein in the velocity-depth curve (the H-V curve), velocity varies with depth according to a function of first degree, and the velocity linearly increases with the depth, according to a formula v=ah+b, wherein v is an interval velocity, h is a strata burial depth, and a, b are characteristic parameters of the velocity-depth curve; characterized in that the velocity-depth curve is a well-constrained transverse variable H-V curve, and the well-constrained transverse variable H-V curve is determined by the following steps: A. drilling a plurality of wells, measuring actual depth of strata in each well to obtain actual drilling result, calculating the interval velocity of each strata in each well in a survey area with an acoustic logging curve, and calculating a conversion interval velocity of each stratum in each well with the actual drilling result, said survey area refers to the work area of seismic exploration, said each strata in each well refers to various geologic strata at a well location, and said actual drilling result refers to the actual depth of the strata; B. with coordinates of the well location in each strata in step A, drawing a circle with said coordinates as the center, and forming a set by all the well locations in the circle; if the number of wells in the set is smaller than a preset value, enlarging the radius until the number of wells in the set is larger than or equal to the preset value; C. fitting the function of first degree regarding the variation of velocity with depth by regression analysis, according to the logging interval velocity of each well in the set of step B, taking the value a of the function as the value a of the well location; D. calculating value b from the formula v=ah+b, according to the value a of the well location and the conversion interval velocity derived from step A, taking said value b as the value b of the well location; E. gridding the value a obtained from step C and value b from step D, respectively, according to Kriging interpolation algorithm to form a plurality of grid locations across the survey area and to obtain value a and value b of each grid location in the whole survey area, and forming the well-constrained transverse variable H-V curve in accordance with the formula v=ah+b.