江桥杜66区块浅薄层稠油油藏热水驱注采参数优化

Optimization of Injection-Production Parameters in Thin Heavy Oil Reservoirs Development of Du66 Block in Jiangqiao through Hot Water Flooding

为提高浅薄层普通稠油油藏冷采后的开发效果,对影响热水驱开发效果的注采参数进行了研究。根据相似性原理模拟与储层特征和热采环境相似的岩心驱替试验,应用petrel软件建立区块地质模型,并采用CMG软件热采模块的数值模型,对比分析不同温度、不同注入方式和注采比下杜66区块的开发效果,确定了中含水期转注热水、冷热水交替注入的开发方式。研究表明,优化后的开发方式为综合含水60%时转注热水,采取冷热交替七段塞、注采比0.95的方式注入温度80℃热水,其驱油效率比冷水驱提高17.27%。研究结果表明,热水驱可以改善浅薄层普通稠油油藏的开发效果,为浅薄层稠油油藏经济有效开发提供了技术支持。

In order to improve the recovery of thin heavy oil reservoir after cold production,injection- production parameters influencing hot water flooding have been studied. According to the core flooding la- boratory experiment under the simulated reservoir conditions and thermal recovery environment, the geo- logical model and numerical model were established with petrel and thermal recovery module of CMG, re- spectively. Du66 Block development under various temperatures, injection patterns and IPR were compared, the development mode of flooding shift in moderate water cut stage and alternating injection of hot and cold water were selected. The study shows the optimized development mode includes flooding shift at water cut of 60% ,7 cycles of alternating injection of hot and cold water,and injection of 80 ℃ hot water at 0.95 IPR, which can result in an increase of oil displacement efficiency of 17. 27% over cold water flooding. The re- search results show that hot water flooding can improve the development effect of thin heavy oil reservoirs and provide technical support for their economic development.