碳酸盐岩缝洞型油藏深抽实践认识——以塔河油田为例

Deep pumping in fractured-and-vuggy carbonate reservoirs: Practices in Tahe oil field

张世亮 崔奕 郭忠良 丁磊

Zhang Shiliang Cui Yi Guo Zhongliang Ding Lei

中国石化 西北油田分公司 采油二厂, 新疆 轮台 841604

No. 2 Oil Production Plant, SINOPEC Northwest Oilfield Company, Luntai, Xingjiang 841604, China

深抽作为经济有效的一个常规提液手段，逐步应用于塔河油田缝洞型油藏，并且形成了一套以注水曲线指导深抽的技术政策，但实践过程中发现注水走平井深抽有效率一般。通过对深抽机理重新认识，发现前期忽略了裂缝系统的应力敏感，实际生产过程中裂缝渗透率会随地层压力下降而变差，提出深抽不能一味的去降低液面、放大生产压差，应该合理补充远端地层能量，采取保压开采。

As a conventional and economic technique, deep pumping has been applied gradually in fractured-and-vuggy carbonate reservoirs in the Tahe oil field, guiding by water injection curves. However, the practice of deep pumping in go-flat injection wells showed a poor efficiency. With a new understanding of deep pumping mechanism, it was found that stress was sensitive in fracture system. Fracture permeability decreased as formation pressure increased during production. As a result, when deep pumping, we should not blindly deepen fluid level and enlarge production pressure difference. Logically supplying formation energy was recommended to take packing mining.

https://doi.org/10.11781/sysydz2016S1075