Abstract:

Guantao system of Chengdao reservoir in Shenli oil field is a river sedimentary faces, high permeability, high saturation, viscous crude and loose sandstone reservoir. According to the design and the numerical simulation of this reservoir, it would get the best development effect and the economic benefit if the change for water injection was applied in the Guantao system when the reservoir pressure decreased to the saturation pressure. Because the change for water injection was lagged for about two years and the reservoir was in its depletion drive stage, the timing of water injection designed formerly and the injection-production ratio 1:1 were not adapt to the actual reservoir situations. On the basis of the farther cognition of the formation growing and the development characterization in the Guantao system, the tracking numerical simulation is used to optimize and consummate the water injection technique policy in Guantao system of Chengdao oil field. Through intensifying the tracking analysis and adjusting duly after the water injection was applied, a better effect will be gotten in the water injection development.

Key words: Chengdao oil field, water injection development, tacking numerical simulation, optimization and adjustment