致密油藏注水吞吐参数优化模拟——以吉林扶余油层为例

Optimization of engineering parameters for horizontal huff and puff development of tight reservoir

为了优选与注水吞吐开发效果有关的注水时机、注水量、注水速度等工程参数,以吉林扶余油层泉四段Ⅲ砂组致密油藏为研究对象,针对致密油藏不同尺度多重孔缝介质,采用非结构混合网格加密技术,利用有限体积数值模拟方法对压裂水平井的注水吞吐开发工程参数进行了优化计算,得到了注水时机、注水量、注水速度、闷井时间、吞吐周期这5个工程参数的最优范围。并对该吞吐条件下的吞吐开发效果进行了评价,评价结果表明,在进行11个吞吐周期后,产油量可以提高约7000 m 3,提高采出程度为2.78%,吞吐效果较为明显。

To optimize the engineering parameters related to the development effect of water injection huff and puff,such as water injection timing,water injection volume,water injection speed,etc.Taking the third sand group of the fourth member of Quan Mine in Fuyu reservoir of Jilin province as the research object,aiming at the multi-pore and fracture media of different scales in the tight reservoir,the engineering parameters of water injection huff and puff development in fractured horizontal wells are optimized by using unstructured hybrid mesh refinement technique and finite volume numerical simulation method.The optimum ranges of five engineering parameters,such as injection timing,injection volume,injection speed,mugging time and huff and puff cycle,are obtained,and the huff and puff development effect under this huff and puff condition is evaluated.The evaluation results show that after 11 huff and puff cycles,the oil production can be increased by about 7000 m 3,and the recovery degree can be increased by 2.78%.The huff and puff effect is obvious.