Study on determining the dominant flow path of oil reservoir by static data

Abstract

Block A is a 2016-2017 production block. After infilling, block 1,2 and 3 are divided into three segments, block 4 is divided into two segments, block 4 is divided into two segments, and block 4 is not divided into segments, that is, Gaotaizi first segment. With the increase of well pattern density and the increase of vertical upper strata, the whole injection-production relationship becomes more complex and the dynamic adjustment is more difficult. By integrating the static data, we can determine the dominant wells and the dominant zones among the well groups, and find out the dominant channel of each zone by comparing the seepage capacity in each direction of the water coming from the sub-zone. To further subdivide the connecting types, and finally determine the dominant channel of each sedimentary unit by combining the reservoir thickness, well spacing and source direction. For the case of multiple well patterns interacting with each other, aiming at the sections of the dominant wells and formations which are in the front of the sequence and are easy to be overinjected. For the interval in the middle of the sequence of dominant wells and formations, the water injection volume fluctuates frequently and needs to be checked and matched. For the interval in which the sequence of dominant wells and formations is backward, the measures of increasing injection are adopted. It has important guiding significance for efficient development of Gaotaizi reservoir in the later stage of ultra-high water cut.