Method analysis on natural decline rate control in mature oilfield

In order to gain stable single well production rate, this paper provides a method to effectively control the natural decline rate and proposes the way to realize it. Taking continuous flow process of fluid as main line, three zones, two types and six factors analyzing methods were mentioned in detail. Preliminary analyses were made to the target parameters of each flow zone and the component part of each factor affecting the target. It is suggested that gray correlation theory was used to investigate the correlation degree between the influence factors in every flow zone and zone target. Priorities of control and adjustment measures could be chose according to the sequence of correlation degree for influence factors.