埕岛油田跟踪优化注水开发及效果

胜利海上埕岛油田馆陶组为河流相沉积的高渗透、高饱和、稠油、疏松砂岩油藏。根据开发方案设计和数值模拟研究,馆陶组在地层压力降至饱和压力附近转注,开发效果和经济效益最好。由于实施注水工程滞后两年,油藏进入溶解气驱阶段,原制定的注水时机、注采比用1.0等技术政策已不能符合油田的实际情况,在对储层发育状况及馆陶组开采特征进一步认识的基础上,应用跟踪数值模拟技术,对埕岛油田馆陶组注水开发技术政策进行了优化和完善;实施注水后,通过强化跟踪分析,及时调整,注水开发见到较好效果。

TRACKING OPTIMUM DEVELOPMENT BY WATER INJECTION AND ACHIEVE EFFECT IN CHENGDAO OILFIELD

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.