套管/固井/区域隔离

该技术通过减少套管与水泥脱粘来提高井筒完整性

本文讨论了在易受常见固井问题影响的井中部署具有粗糙表面轮廓的外部保护涂层。

图 1——放置在 7 英寸套管内的 4 英寸外部涂层样品示意图（左）和带有胶结 4 英寸×7 英寸胶结环空的实际样品（右）。
图 1——放置在 7 英寸套管内的 4 英寸外部涂层样品示意图（左）和带有胶结 4 英寸×7 英寸胶结环空的实际样品（右）。
来源：SPE 220564。

本文探讨了在易受常见固井问题影响的井中，如何应用表面粗糙的外部保护涂层。作者介绍了相关挑战，并强调了该解决方案在有效提升井筒完整性方面的优势和稳健性。研究结果表明，该技术的实施不仅可以提供防腐保护，还能增强套管/水泥浆的粘结力，从而降低流体运移的风险。

介绍

作者重点研究了套管表面改性对增强套管/水泥粘结的效果。

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原文链接/JPT
Casing/cementing/zonal isolation

Technique Improves Well Integrity by Mitigating Casing-to-Cement Debonding

This paper addresses the deployment of an external protective coating with a rough surface profile in wells identified as susceptible to common cementing issues.

Fig. 1—Schematic of 4½-in. externally coated sample placed inside 7-in. casing (left) and the actual sample with cemented 4½-in.×7-in. cemented annulus (right).
Fig. 1—Schematic of 4½-in. externally coated sample placed inside 7-in. casing (left) and the actual sample with cemented 4½-in.×7-in. cemented annulus (right).
Source: SPE 220564.

This paper addresses the deployment of an external protective coating with a rough surface profile in wells identified as susceptible to common well-cementing issues. The authors present the associated challenges and highlight the benefits and robustness of the solution in effectively enhancing well integrity. Their study’s outcomes indicated that the implementation of this technique not only provides corrosion protection but also enhances the casing/cement bond. Thus, the risk of fluid migration is lowered.

Introduction

The authors focus on investigating the effect of casing-surface modification to enhance the casing/cement bond.

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