碎屑岩酸化优选及数值模拟研究

Optimization and numerical simulation of clastic rock acidification

张雄 安娜 米强波 方裕燕

Zhang Xiong An Na Mi Qiangbo Fang Yuyan

中国石化西北油田分公司石油工程技术研究院, 乌鲁木齐 830011

Research Institute of Engineering Technology, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

针对塔河油田碎屑岩地层矿物种类繁多、酸岩反应复杂、酸化效果不理想的问题,结合其他油田现场实践以及大量文献调研,给出了碎屑岩酸化选井选层及酸化酸液配方优选标准。根据该标准对塔河油田YK20井进行了酸化设计及施工,现场结果表明酸化效果良好。由于很多酸化目标井无法取得岩心进行室内流动实验,因此建立了酸岩反应数值模型,并对其进行了求解;计算结果与室内实验结果能较好的吻合,可在不进行室内流动实验的条件下指导酸化设计。

Acidifacation effect is not ideal in the Tahe Oil Field due to the complicated mineral compostion of clastic rock formations. We optimized the standard for well/formation selection and the formula of acid fracturing fluid. The optimized standard was applied in well YK20 in the Tahe Oil Field, and worked well. For some acidification wells, laboratory flow experiments can not be made due to the absence of core samples. In view of this, we established and solved a numerical simulation model. The calculation results were consistent with the laboratory experiment results. As a result, we can guide acidification design without laboratory flow experiments.

https://doi.org/10.11781/sysydz2015S1125