非常规致密储层压裂缝网数字孪生构建理论与方法  

Theoretical and methodological discussion on the construction of digital twin for fracture networks in unconventional tight reservoirs

作　　者：陆吉 林伯韬[1] 朱海涛 金衍[2] 孟翰 LU Ji;LIN Botao;ZHU Haitao;JIN Yan;MENG Han(College of Information Science and Engineering/College of Artificial Intelligence,China University of Petroleum,Beijing 102249,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)信息科学与工程学院/人工智能学院,北京102249 [2]中国石油大学(北京)石油工程学院,北京102249

出　　处：《世界石油工业》2025年第1期108-119,共12页World Petroleum Industry

基　　金：国家自然科学基金项目“砾岩储层砾石-交界面-基质合压水力裂缝非平面扩展机制研究”(42277122)。

摘　　要：水平井分段压裂技术及大规模体积改造技术的提升,使非常规油气开发获得重大突破和快速发展。致密油气藏成为继页岩气之后全球非常规油气勘探开发的新热点。随着水力压裂技术在致密储层开发中的推广应用,压裂缝网精细化表征成为水力压裂数字化、智能化发展建设的关键问题,对压裂效果评价及压裂施工优化具有重要的意义。由于致密储层天然裂缝发育、非均质性强,压裂后复杂的缝网形态给缝网表征带来极大挑战。基于高精度数据采集、实时数据传输、虚拟实体建模与分析、机理数据融合仿真与决策的数字孪生技术,为压裂缝网表征提供了新思路。(1)介绍数字孪生的基本概念及压裂缝网表征的研究现状,提出压裂缝网数字孪生的五维模型及系统架构;(2)将压裂缝网数字孪生的虚拟实体归纳为储层的地质力学模型和压裂缝网模型,研究相应的孪生模型构建方法;(3)分析压裂缝网数字孪生应用于支撑剂运移及油气井产能预测的场景。在此基础上,探讨压裂缝网数字孪生亟待发展的关键技术并提出相关建议,旨在为致密储层水力压裂缝网的数字化及智能化表征与控制提供理论与方法指导。Due to the development of horizontal well segmented fracturing technology and large-scale volume transformation technology,unconventional oil and gas exploration and development have achieved significant breakthroughs and rapid development.Tight oil and gas reservoirs have become a new hotspot for unconventional oil and gas exploration and development worldwide,following shale gas.With the popularization and application of hydraulic fracturing technology in the development of tight reservoirs,the characterization of fracture network has become a key issue in the digital and intelligent development of hydraulic fracturing.It is of great significance to evaluate the fracturing effect and optimize the fracturing technology.The complex fracture network morphology caused by natural fractures and strong heterogeneity pose great challenges to the characterization of fracture networks.Digital twin technology based on high-precision data acquisition,real-time data transmission,virtual entity modeling and analysis,simulation and decision-making upon mechanism data fusion provides a new idea for fracturing fracture network characterization.This paper firstly introduces the basic concept of digital twins and the current research status of fracture network characterization,proposing a five-dimensional model and system architecture for digital twins of fracture networks.Secondly,it categorizes the virtual entities of fracture networks into geomechanical models and fracture network models,and elaborates on the model construction methods.Finally,it analyzes the applications of digital twins of fracture networks in proppant transportation and production prediction.On this basis,the key technologies of digital twin for fracture network that need to be developed are discussed.The results of this paper can provide theoretical and methodological guidance for the digital and intelligent characterization and control of hydraulic fracture networks in tight reservoirs.

关 键 词：非常规油气 致密储层 水力压裂 压裂缝网表征 数字孪生 人工智能 数字化建模 

分 类 号：TE319[石油与天然气工程—油气田开发工程] TE357.1