缝洞型油藏开发室内模拟研究

Laboratory simulation study on exploitation of fractured and cavernous reservoirs

刘鹏飞 姜汉桥 徐晖 胡庆贺 涂兴万

LIU Pengfei JIANG Hanqiao XU Hui HU Qinghe TU Xingwan

中国石油大学石油工程教育部重点实验室，北京　102249 中国石化西北石油局采油二厂，新疆乌鲁木齐　830011

MOE Key Laboratory of Petroleum Engineering, China Petroleum University, Beijing 102249, China No.2 Oil Recovery Plant of Sinopec Northwest Petroleum Bureau, Urumqi 830011, China

基于塔河缝洞型碳酸盐岩油藏地质特征和开采规律，建立了一套能够模拟以补充能量和重力置换为主要作用机理的单井注水替油室内试验装置。在接近实际油藏条件下，采用注水、注气进行了对注入孔隙体积倍数与采出程度、压力等关系试验，结果表明：天然能量开采程度低；多轮注水在两次注水后基本失效；多轮注水稳定开采后，后期的多轮注气开采有很好的采出效果，尤其是前三轮尤佳，注气阶段后采出程度增加了27.4%。

Based on the geological characteristics and the exploitation rule of Tahe fractured carbonate reservoir, a set of indoor experimental devices that can be used to simulate single-well water injection for oil displacement is established. The main mechanism of the devices is to add energy and replace gravity. Closing to the actual conditions of the reservoir, water injection and gas injection are carried out to test the correlation between the multiple of pore volume and the recovery degree and stress. The results show that exploitation with natural energy is on a low level. And the injection after two rounds becomes invalid basically. In addition, after several rounds of water stability in the exploitation, gas injection in the later rounds of exploitation has a good recovery results, especially in the former three rounds. After gas injection there is an increase of 27.4 percent in the degree of recovery.