井干预

缓解气井井下盐沉积的新方法

本文介绍了一种涉及安装速度管柱的井下盐沉淀解决方案。

荷兰北海一家天然气生产商的射孔深度附近出现了盐沉淀（左），特写照片显示了用捞砂工具串捞出的盐。
图 1——荷兰北海某天然气生产商靠近穿孔深度处的盐沉淀（左），以及用舀水工具串带上来的盐的特写照片。
来源：SPE 215035。

井下盐沉淀是北海成熟气田日益严重的问题。目前已构思并应用了两种新解决方案，第一种是安装速度管柱。本文介绍了一个案例研究，其中设置了四个速度管柱，大大提高了平台流量并延长了资产寿命。该解决方案的主要优势在于它相对简单且非常可靠，并且不会增加运营费用 (OPEX)。通过在井下补充淡水来补偿蒸发也是本文讨论的缓解方法之一。

介绍

本文介绍了两种提高受盐沉积问题影响的气井生产性能的成功方法。

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原文链接/JPT
Well intervention

Novel Solutions Mitigate Downhole Salt Deposition in Gas Wells

This paper describes a solution for downhole salt precipitation involving the installation of velocity strings.

Salt precipitation close to perforation depth in a gas producer in the Dutch North Sea (left) with close-up photographs of salt brought up in a bailer toolstring.
Fig. 1—Salt precipitation close to perforation depth in a gas producer in the Dutch North Sea (left) with close-up photographs of salt brought up in a bailer toolstring.
Source: SPE 215035.

Downhole salt precipitation is an increasing issue in mature gas fields of the North Sea. Two novel solutions have been conceptualized and applied, the first being the installation of velocity strings. A case study is presented wherein four velocity strings were set, leading to a strong increase in platform flow rate and the extension of asset life. The major advantage of this solution is that it is relatively simple and extremely robust and does not involve increased operating expense (OPEX). Compensation of evaporation by downhole supplementation of fresh water also is a method of mitigation discussed in the complete paper.

Introduction

This paper describes two successful methods of increasing production performance for gas wells suffering from salt depositional issues.

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