PetroChina Liaohe Oilfield Company
Major science and technology projects of CNPC (2017E-16)
针对高含水油藏开发后期流场内部优势通道明显，注入水低效循环导致开发效果差等问题开展了流场匹配性研究，建立了高含水油藏流场评价体系，并以此对比不同层系流场的油相匹配度和水相匹配度，找到需要调整的小层。同时以注水量和产液量为变量，以累积产油量最大值为目标函数，构建注采优化模型，利用蚁群算法对模型进行求解，得到最优注采方案。以埕东油藏为例，评价结果表明第4、8、10层开发效果较差。对于此类较差区域注采调整后得到最优注采方案，对比原开发方案产油量增加了173 76 m3，含水率降低了0.028 7%。研究表明油藏流场评价体系可以快速准确表征高含水油藏流场，结合注采优化可以改善高含水油藏流场分布，提高剩余油的动用程度，充分挖潜剩余油潜力，对改善高含水油藏水驱开发效果具有重要意义。
The flow field matching was studied and the flow field evaluation system of high water cut reservoirs was established, based on the study of the problems such as obvious internal dominant channels of the flow field in the later stage of the development of high water cut reservoirs and the poor development effect caused by the inefficient circulation of injected water. Based on the evaluation system, the oil phase matching degree and water phase matching degree of the flow field of different layers are calculated and compared, and the small layers that need to be adjusted are found. At the same time, the injection production optimization model is established with the maximum cumulative oil production as the objective function, and the ant colony algorithm is used to solve it, so as to obtain the optimal injection production scheme. Chengdong reservoir is taken as the example to evaluate the flow field matching degree, and the development effect of the 4th, 8th and 10th layers is poor. After adjusting the injection and production of such poor areas, the optimal injection and production result was obtained. Compared with the original development plan, the oil production increased by 17376 m3 and the water cut decreased by 0.0287%. The research indicates that the flow field of high water cut reservoir can be quickly and accurately characterized by the reservoir flow field evaluation system. Meanwhile, the optimization of injection and production can improve the flow field distribution of high water cut reservoir, improve the degree of remaining oil production, and fully tap the potential of remaining oil, which is of great significance to improve the waterflooding development effect of high water cut reservoir.
石栗,侯智玮. 基于流场匹配性评价的注采优化研究——以埕东油藏为例[J]. 科学技术与工程, , ():复制