摘要
根据渤海旅大16-1深层特稠油油藏地质特点,建立了室内高温高压填砂模型,通过物理与数值模拟研究了多元热流体辅助重力泄油（MAGD）开采规律,结果表明：MAGD初期产能高,采油速度递减快,与蒸汽辅助重力泄油（SAGD）相比,其物理模拟采收率与累积油汽比分别提高了4.7%和0.196,与数值模拟结果（5.3%和0.066）较为一致;MAGD通过添加大量非凝析气扩大了泄油面积,此外非凝析气与原油间的物理化学作用,减少了蒸汽注入量,进一步提高了采收率。MAGD影响因素研究表明：随气水比增加,采收率先上升后下降,最佳气水比为20~50;增加CO2比例有助于提高开采效果;注汽温度越高,开采效果越好。
Based on the geological properties of LD16-1 extra-heavy oil reservoir in Bohai water, a taborato- ry sand-packed model with high temperature and pressure was built, through which the recovery pattern of multi-component-thermal-fluid-assisted gravity drainage （MAGD） was researched by using physical and numerical simulation. The results have indicated that MAGD will be characterized by high initial produc- tivity and fast production decline, with its recovery factor and cumulative oil-steam ratio in physical simu- lation being 4.7% and 0. 196 higher than those of steam-assisted gravity drainage （SAGD） respectively, and in numerical simulation being 5.3% and 0. 066 higher than those of SAGD respectively. MAGD will increase its oil drainage area due to injecting a lot of non-condensate gas, and several effects of non-conden- sate gas further improve recovery effects. According to a research on the factors to influence MAGD, the recovery factor will first rise and then fall with increasing the gas-water ratio, with the optimal gas-water ratio being 20～50. In addition, increasing the proportion of CO2 will improve recovery effects of MAGD, and the higher the temperature of injected steam, the better the recovery effects.
出处
《中国海上油气》
CAS
CSCD
北大核心
2015年第1期68-73,共6页
China Offshore Oil and Gas
基金
国家自然科学基金项目"蒸汽-气体协同驱替与重力泄油开采方法研究(编号:51474227)"
国家自然科学基金项目"二氧化碳驱油藏流体混合传质理论与局部混相效应研究(编号51174041)"部分研究成果
关键词
多元热流体辅助重力泄油
SAGD
非凝析气
特稠油
物理模拟
数值模拟
multi-component-thermal-fluid-assisted gravity drainage
steam-assisted gravity drainage
non- condensate gas
extra-heavy oil
physical simulation
numerical simulation
