Method for recognizing thief zone in oil pool, computer apparatus and computer readable storage medium

Abstract

A method for recognizing a thief zone in an oil pool, a computer apparatus and a computer readable storage medium, wherein, the method comprises: calculating a yield contribution value per unit thickness for single-reservoir stratum and a relative contribution coefficient of individual reservoir stratum in oil pool production logging, the relative contribution coefficient being a ratio of the yield contribution value per unit thickness for single-reservoir stratum to a yield per unit thickness for the whole reservoir stratum interval; determining a smallest yield contribution value per unit thickness for single-reservoir stratum and a smallest relative contribution coefficient from the yield contribution values per unit thickness for single-reservoir stratum and the relative contribution coefficients in the oil pool production logging, according to the characteristics of different oil pools; calculating the yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient of each reservoir stratum of each well in the oil pool to-be-measured; determining whether or not a thief zone is developed for each reservoir stratum of each well according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to the magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient.

1 . A method for recognizing a thief zone in an oil pool, comprising:
 calculating a yield contribution value per unit thickness for single-reservoir stratum and a relative contribution coefficient of individual reservoir stratum in oil pool production logging, wherein, the yield contribution value per unit thickness for single-reservoir stratum is a ratio of a single-reservoir stratum yield to a single-reservoir stratum thickness, and the relative contribution coefficient is a ratio of the yield contribution value per unit thickness for single-reservoir stratum to a yield per unit thickness for the whole reservoir stratum interval;   determining a smallest yield contribution value per unit thickness for single-reservoir stratum and a smallest relative contribution coefficient from the yield contribution values per unit thickness for single-reservoir stratum and the relative contribution coefficients in the oil pool production logging, according to the characteristics of different oil pools, wherein, the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient meet the requirements of thief zone recognition for different oil pools;   calculating the yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient of each reservoir stratum of each well in the oil pool to-be-measured; and   determining whether or not a thief zone is developed for each reservoir stratum of each well, according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to a magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient.   
     
     
         2 . The method for recognizing a thief zone in an oil pool according to  claim 1 , wherein determining whether or not a thief zone is developed for each reservoir stratum of each well according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to a magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient comprises:
 drawing a graph by taking the yield contribution value per unit thickness for single-reservoir stratum of individual reservoir stratum in the oil pool production logging as an ordinate and the relative contribution coefficient of individual reservoir stratum in the oil pool production logging as an abscissa, wherein, an intersection line of the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient divides the graph into different areas; and   determining whether or not a thief zone is developed for each reservoir stratum of each well, according to distribution positions of the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the relative contribution coefficient of each reservoir stratum of each well in the different areas of the graph.   
     
     
         3 . The method for recognizing a thief zone in an oil pool according to  claim 1 , wherein determining whether or not a thief zone is developed for each reservoir stratum of each well according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to a magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient comprises:
 not judging the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is smaller than the smallest yield contribution value per unit thickness for single-reservoir stratum; determining the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is smaller than the smallest relative contribution coefficient to be a non-thief zone; and   determining the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is greater than the smallest relative contribution coefficient to be a thief zone.   
     
     
         4 . The method for recognizing a thief zone in an oil pool according to  claim 1 , wherein for a carbonatite oil pool, the smallest yield contribution value per unit thickness for single-reservoir stratum is 50, and the smallest relative contribution coefficient is 2. 
     
     
         5 . A computer apparatus comprising a processor and a memory comprising computer readable instructions, the processor being enabled to execute the following operations when the computer readable instructions are executed:
 calculating a yield contribution value per unit thickness for single-reservoir stratum and a relative contribution coefficient of individual reservoir stratum in oil pool production logging, wherein, the yield contribution value per unit thickness for single-reservoir stratum is a ratio of a single-reservoir stratum yield to a single-reservoir stratum thickness, and the relative contribution coefficient is a ratio of the yield contribution value per unit thickness for single-reservoir stratum to a yield per unit thickness for the whole reservoir stratum interval;   determining a smallest yield contribution value per unit thickness for single-reservoir stratum and a smallest relative contribution coefficient, from the yield contribution values per unit thickness for single-reservoir stratum and the relative contribution coefficients in the oil pool production logging, according to the characteristics of different oil pools, wherein, the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient meet the requirements of thief zone recognition for different oil pools;   calculating the yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient of each reservoir stratum of each well in the oil pool to-be-measured; and   determining whether or not a thief zone is developed for each reservoir stratum of each well, according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to a magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient.   
     
     
         6 . The computer apparatus according to  claim 5 , wherein the computer readable instructions enable the processor to:
 draw a graph by taking the yield contribution value per unit thickness for single-reservoir stratum of individual reservoir stratum in the oil pool production logging as an ordinate and the relative contribution coefficient of individual reservoir stratum in the oil pool production logging as an abscissa, wherein, an intersection line of the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient divides the graph into different areas; and   determine whether or not a thief zone is developed for each reservoir stratum of each well, according to the distribution positions of the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the relative contribution coefficient of each reservoir stratum of each well in the different areas of the graph.   
     
     
         7 . The computer apparatus according to  claim 5 , wherein the computer readable instructions enable the processor:
 not to judge the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is smaller than the smallest yield contribution value per unit thickness for single-reservoir stratum;   to determine the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is smaller than the smallest relative contribution coefficient to be a non-thief zone; and   to determine the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is greater than the smallest relative contribution coefficient to be a thief zone.   
     
     
         8 . A computer readable storage medium comprising computer readable instructions, wherein the computer readable instructions enable a processor to at least execute the following operations when the computer readable instructions are executed:
 calculating a yield contribution value per unit thickness for single-reservoir stratum and a relative contribution coefficient of individual reservoir stratum in oil pool production logging, wherein, the yield contribution value per unit thickness for single-reservoir stratum is a ratio of a single-reservoir stratum yield to a single-reservoir stratum thickness, and relative contribution coefficient is a ratio of the yield contribution value per unit thickness for single-reservoir stratum to a yield per unit thickness for the whole reservoir stratum interval;   determining a smallest yield contribution value per unit thickness for single-reservoir stratum and a smallest relative contribution coefficient, from the yield contribution values per unit thickness for single-reservoir stratum and the relative contribution coefficients in the oil pool production logging, according to the characteristics of different oil pools, wherein, the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient meet the requirements of thief zone recognition for different oil pools;   calculating the yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient of each reservoir stratum of each well in the oil pool to be measured; and   determining whether or not a thief zone is developed for each reservoir stratum of each well, according to a magnitude relationship between the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the smallest yield contribution value per unit thickness for single-reservoir stratum and according to a magnitude relationship between the relative contribution coefficient of each reservoir stratum of each well and the smallest relative contribution coefficient.   
     
     
         9 . The computer readable storage medium comprising computer readable instructions according to  claim 8 , wherein the computer readable instructions enable the processor to:
 draw a graph by taking the yield contribution value per unit thickness for single-reservoir stratum of individual reservoir stratum in the oil pool production logging as an ordinate and the relative contribution coefficient of individual reservoir stratum in the oil pool production logging as an abscissa, wherein, an intersection line of the smallest yield contribution value per unit thickness for single-reservoir stratum and the smallest relative contribution coefficient divides the graph into different areas; and   determine whether or not a thief zone is developed for each reservoir stratum of each well, according to the distribution positions of the yield contribution value per unit thickness for single-reservoir stratum of each reservoir stratum of each well and the relative contribution coefficient of each reservoir stratum of each well in the different areas of the graph.   
     
     
         10 . The computer readable storage medium comprising computer readable instructions according to  claim 8 , wherein the computer readable instructions enable the processor:
 not to judge the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is smaller than the smallest yield contribution value per unit thickness for single-reservoir stratum; to determine the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is smaller than the smallest relative contribution coefficient to be a non-thief zone; and   to determine the reservoir stratum of which the yield contribution value per unit thickness for single-reservoir stratum is greater than the smallest yield contribution value per unit thickness for single-reservoir stratum and the relative contribution coefficient is greater than the smallest relative contribution coefficient to be a thief zone.