石油学报 ›› 2019, Vol. 40 ›› Issue (7): 830-838.DOI: 10.7623/syxb201907007

• 油田开发 • 上一篇    下一篇

致密油多级压裂水平井井网参数分级优化

冯其红1, 徐世乾1,2, 任国通2, 王森1, 李昱垚1   

  1. 1. 中国石油大学(华东)石油工程学院 山东青岛 266580;
    2. McDougall School of Petroleum Engineering, University of Tulsa Tulsa 74104 USA
  • 收稿日期:2018-11-27 修回日期:2019-04-29 出版日期:2019-07-25 发布日期:2019-07-28
  • 通讯作者: 徐世乾,男,1991年2月生,2014年获中国石油大学(华东)学士学位,现为中国石油大学(华东)博士研究生、美国University of Tulsa联合培养博士研究生,主要从事致密油油藏数值模拟及生产优化方面的科研工作。Email:xsq.s.upc@gmail.com
  • 作者简介:冯其红,男,1969年6月生,1993年获石油大学(华东)学士学位,2004年获中国石油勘探开发研究院博士学位,现为中国石油大学(华东)教授、博士生导师,主要从事非常规油气勘探开发及提高采收率方面的科研工作。Email:fengqihong.upc@gmail.com
  • 基金资助:

    国家自然科学基金石油化工联合基金(A类)重点支持项目(No.U1762213)、国家重点基础研究发展计划(973)项目"致密油高效开发油藏工程理论与方法研究"(2015CB250905)、国家科技重大专项"松辽盆地致密油开发示范工程"(2017ZX05071)和中央高校基本科研业务费专项资金项目(18CX07006A)资助。

Hierarchical optimization of well pattern parameters in multi-stage fractured horizontal well for tight oil

Feng Qihong1, Xu Shiqian1,2, Ren Guotong2, Wang Sen1, Li Yuyao1   

  1. 1. School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
    2. McDougall School of Petroleum Engineering, University of Tulsa, Tulsa Oklahoma 74104, USA
  • Received:2018-11-27 Revised:2019-04-29 Online:2019-07-25 Published:2019-07-28

摘要:

为改善致密油的开发效果,以经济净现值最大化为优化目标,提出了先优化单井裂缝参数,再优化井网参数的分级优化策略,建立了致密油多级压裂水平井井网参数分级优化数学模型。考虑基质中流体的非线性渗流,基质和压裂缝的应力敏感特性,基于嵌入离散裂缝模型建立了致密油藏数值模拟方法;利用耦合协方差矩阵自适应进化策略算法对数学模型进行求解,提出了致密油多级压裂水平井井网参数分级优化方法。与整体优化相比,新的分级优化策略可以在不降低优化结果准确性的基础上提高寻优效率。若不考虑基质中流体的非线性渗流,基质和压裂缝渗透率的应力敏感特性,则优化结果不具有矿场指导意义。

关键词: 致密油, 水平井, 水力裂缝, 优化方法, 嵌入离散裂缝

Abstract:

To improve the recovery of tight oil, a hierarchical optimization strategy is built to maximize net present value (NPV), i.e., to initially optimize single-well fracture parameters, and then optimize well pattern parameters. On this basis, the mathematical model has been created for the hierarchical optimization of well pattern parameters in multi-stage fractured horizontal well of tight oil. First, considering the non-linear flow in matrix and the stress sensitivity of matrix and fracture, a reservoir numerical simulation method of tight oil has been established based on embedded discrete fracture model, and then through the coupling it and the covariance matrix adaptation evolution strategy (CMA-ES)algorithm to solve this mathematical model, an efficient optimization method is proposed on well pattern parameters in multi-stage fractured horizontal well of tight oil. In comparison with overall optimization, the hierarchical optimization strategy proposed in this paper can significantly improve the optimization efficiency but with no reduction in the accuracy of optimization results. In addition, if not considering the non-linear flow in matrix and the stress sensitivity of matrix and fracture permeability, the optimal results will have no guiding significance to mining.

Key words: tight oil, horizontal well, hydraulic fracture, optimization method, embedded discrete fracture model

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