Model-based interpretation of bottomhole pressure records during matrix treatments in layered formations

作     者：Igor Reznikov Dmitry Abdrazakov Dimitry Chuprakov Igor Reznikov;Dmitry Abdrazakov;Dimitry Chuprakov

作者机构：Schlumberger Moscow ResearchLeningradskoe shossebldg.16Acorp.3Moscow125171Russian Federation Novosibirsk Technology Center1/10 Zelenaya Gorka strNovosibirsk630060Russian Federation 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2024年第21卷第5期

页      面：3587-3611页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：Authors express gratitude to Marat Yamborisov for participation at the initial stage of this project  Dr. Valery Shako for valuable remarks about the model  Aleksandra Peshcherenko for assistance with paper preparation  and Schlumberger for permission to publish this work 

主　　题：Matrix treatment Inverse problem Forward problem Skin factor Interpretation 

摘      要：During injection treatments, bottomhole pressure measurements may significantly mismatch modeling results. We devise a computationally effective technique for interpretation of fluid injection in a wellbore interval with multiple geological layers based on the bottomhole pressure measurements. The permeability, porosity and compressibility in each layer are initially setup, while the skin factor and partitioning of injected fluids among the zones during the injection are found as a solution of the problem. The problem takes into account Darcy flow and chemical interactions between the injected acids, diverter fluids and reservoir rock typical in modern matrix acidizing treatments. Using the synchronously recorded injection rate and bottomhole pressure, we evaluate skin factor changes in each layer and actual fluid placement into the reservoir during different pumping jobs: matrix acidizing, water control, sand control, scale squeezes and water flooding. The model is validated by comparison with a simulator used in industry. It gives opportunity to estimate efficiency of a matrix treatment job, role of every injection stage, and control fluid delivery to each layer in real time. The presented interpretation technique significantly improves accuracy of matrix treatments analysis by coupling the hydrodynamic model with records of pressure and injection rate during the treatment.