水管理

适用于高温、高矿度油藏的纳米乳化体系

本文介绍了基于纳米颗粒乳液型化学材料的堵水剂的评价结果​​。

ESN阻塞和解阻塞可逆机制示意图。 (a) ESN注入操作； (b)回流操作。
图1′ESN阻塞与解阻塞可逆机制示意图。(a) ESN注入操作；(b)回流操作。
资料来源：SPE 211167。

完整的论文介绍了基于纳米粒子乳液型化学材料的堵水（WSO）剂的评估结果。WSO剂被作者称为纳米颗粒乳液系统（ESN），与现有的聚合物和凝胶材料相比，它具有多种优点，包括热稳定性高、对矿化的敏感性低、触变特性、对油和水的阻塞效应具有选择性，以及阻断效应的可逆性。在 WSO 应用中，ESN 的这些特性非常适合提高石油采收率。

介绍

ESN 被认为是一种经过验证的碳酸盐岩储层技术。然而，所研究的油藏的条件并不恶劣；因此，这项工作评估了阿联酋通常具有高温和高盐度条件的碳酸盐岩储层的ESN潜力。

除了提高石油采收率外，该技术的一个主要目的是有助于减少温室气体排放并建立具有竞争力的低CO 2强度石油品牌价值。

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Water management

Emulsion System With Nanoparticles Suitable for High-Temperature, High‑Salinity Reservoirs

This paper presents the evaluation results of a water-shutoff agent based on an emulsion-type chemical material with nanoparticles.

Schematic mechanism of ESN reversibility for blocking and unblocking. (a) ESN injection operation; (b) flowback operation.
Fig. 1—Schematic mechanism of ESN reversibility for blocking and unblocking. (a) ESN injection operation; (b) flowback operation.
Source: SPE 211167.

The complete paper presents the evaluation results of a water-shutoff (WSO) agent based on an emulsion-type chemical material with nanoparticles. The WSO agent, which the authors call an emulsion system with nanoparticles (ESN), has several advantages to existing polymer and gel materials, including high thermal stability, low sensitivity to mineralization, thixotropic characteristics, selectivity of blocking effects for oil and water, and reversibility of blocking effects. In WSO applications, these properties of ESN could be well-suited for improved oil recovery.

Introduction

ESN is recognized as a proven technology for carbonate reservoirs. However, the reservoir under study did not feature harsh conditions; therefore, this work evaluated ESN potential for carbonate reservoirs in the UAE typically having high-temperature and high-salinity conditions.

A primary purpose of the technology, aside from improved oil recovery, is contributing to greenhouse-gas emission reduction and building competitive low-CO2-intensity oil-brand value.

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