THE TECHNIQUE AND APPLICATION ON THE COMPREHENSIVE RECOGNITION METHOD OF LOW-ORDER FAULT IN DEEP RESERVOIR DEVELOPMENT STAGE

The low-order fault has great influence on the distribution of remaining oil and the exploitation effectiveness of water drive reservoir in deep development stage.This paper takes Es2(1-3) sand sets of district one in Shengtuo Oilfield for example,which is a faulted anticline reservoir.The distribution model of low-order fault is built to improve the geologic model by 3D seismic interpretation,multi-well strata correlation in close spacing and dynamic analysis of reservoir.The study shows that the low-order fault model needs to be updated with the raising of data occupancy in deep development stage.Limited by the data discernibility and fault dimension,the 3D seismic interpretation is suitable for the identification and rebuilding of the fourth order fault,while the multi-well strata correlation in close spacing is suitable to describe the fifth order fault,and the dynamic analysis is a very important measure to verify the seismic and geologic research results.