Abstract
Jin 45 block has entered the later period of cyclic steam, Transforming the development mode is imminent,there is a big technical risks in the development of cyclic steam of edge and bottom water of heavy oil when it turns to steam flooding development, it is needed to understand the characteristics of Edge-bottom water which invades in reservoir and master the restricting factors of invasion of the edge-bottom water,to avoid the risk of steam flooding development reasonably and effectively. The experiment uses the three layers of inhomogeneous Artificial core which has high permeability transition zone of simulative edge water on the edge. Analysis the factors of differential pressure, temperature and distance of the water and bottom water to the effect of Edge-bottom water encroachment sensitivity. The results show that: Among many factors of water encroachment sensitivity, the effect of differential pressure to the regularity of water invasion is most obvious, at the stage of Connection of water invasion, the differential pressure has a little effect on the Instantaneous water influx, After the channel of water encroachment has formed,Instantaneous water rate and differential pressure is index function relation, in the late of water invasion, the instantaneous water rate is stable. The result provides the basis for the heavy waterflooded area turn to steam flooding.
Published Version
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