超稠油油藏直井辅助双水平井SAGD参数优化

Optimization of SAGD Key Parameters for Vertical Assisted Double Horizontal Wells in Super Heavy Oil Reservoir

王青 杨浩哲 刘佳 高雨 高亮

WANGQing YANGHaozhe LIUJia GAOYu GAOLiang

中国石油新疆油田公司勘探开发研究院, 新疆 克拉玛依 834000 中国石油新疆油田公司风城油田作业区, 新疆 克拉玛依 834000

Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China Fengcheng Oilfield Operation District, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

针对超稠油油藏SAGD开发中蒸汽腔发育不均衡、横向扩展缓慢和汽窜等问题，在SAGD基础上采取了多井型组合、多介质辅助及多措施方式等方法进行开发增效，其中，直井辅助SAGD可以明显改善蒸汽腔发育，提高采油速度且所需费用较少，可操作性较强。目前，直井辅助SAGD技术的关键参数尚无系统性的论证。为了达到最优生产效果，通过数值模拟对风城油田超稠油典型井区Z01井区直井辅助时机、考虑隔夹层时射孔参数、直井吞吐预热阶段的注采参数、直井转汽驱辅助阶段的注采参数进行了优化研究。研究结果表明，直井辅助双水平井SAGD措施能有效地提高水平井动用程度和采油速度，改善开发效果，参数优化后的方案切实有效。该研究为超稠油油藏直井辅助SAGD高效开发提供了重要技术支撑。

In view of the problems of unbalanced development of steam cavity, slow lateral expansion and steam channeling in the development of SAGD in super heavy oil reservoir, multi well combination, multi-media assistance and multi measures are adopted to increase development efficiency on the basis of SAGD. Among them, vertical well assistance SAGD can significantly improve the development of steam cavity, improve oil production rate, and requires less cost and strong operability. At present, the key parameters of vertical well assisted SAGD technology have not been systematically demonstrated. In order to achieve the optimal production effect, the vertical well auxiliary time, perforation parameters considering interlayer, injection production parameters in the preheating stage of vertical well huff and puff, and injection production parameters in the auxiliary stage of vertical well to steam drive in the typical well area Z01 of super heavy oil in Fengcheng Oilfield are optimized through numerical simulation. The research results show that the SAGD measure of vertical well assisted double horizontal wells can effectively improve the production degree and production rate of horizontal well, improve the development effect, and the scheme after parameter optimization is practical and effective. The results provide important technical support for vertical well assisted SAGD efficient development of super heavy oil reservoir.

10.11885/j.issn.1674-5086.2021.06.21.01