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水驱油实验表明油水相渗及驱油效率对温度非常敏感,提高油层温度、降低原油粘度、增加原油流动性是E区超稠油开发的关键。在油藏地质特征综合研究的基础上,优选Y401井区作为注温水先导试验区。数值模拟研究表明,注采井距70m,井口注入100℃温水,可以实现有效驱替。采用反五点井网,直井注水可以满足注采平衡需要,同时可以验证不同方向温水驱效果;直井日注水20m3时,井底流体温度略高于油层温度,不会造成冷伤害。
Water flooding experiments show that oil-water phase permeation and flooding efficiency are very sensitive to temperature. It is the key to develop ultra-heavy oil in E zone to increase the temperature of oil layer, reduce the viscosity of crude oil and increase the fluidity of crude oil. Based on comprehensive study of reservoir geological features, well Y401 is selected as pilot zone for water injection. Numerical simulation shows that injection well spacing 70m, wellhead injection of 100 ℃ warm water, can achieve effective displacement. In the case of 20m3 vertical well water injection, the bottom hole fluid temperature is slightly higher than the temperature of the oil layer and will not cause cold damage.