非常规/复杂油藏

井下氢气生成系统刺激科威特复杂地层

本文重点介绍了一种利用活性氢从候选井选择到试验实施和评估来刺激难以采收的地层的方法。

高速公路边的油井和电线。
资料来源:Ugurhan/Getty Images。

完整论文中描述的试点试验的目的是提供一种经济的解决方案,以开发运营商油田中致密且难以开采的地层。这些资产代表着重大挑战,因为它们的采收率低(1-3%),现有的传统刺激技术成本高,收益低,并且无法维持生产率。

介绍

为了建立致密油和稠油地层的综合增产解决方案,开发了使用活性单原子氢能来提高近井渗透率的概念。该技术基于两种独特的加氢反应剂 (HRA) 之间的原位放热多级化学反应在井下产生氢气。该反应会产生大量热能、活性氢和其他热活性气体和酸性蒸汽。HRA 化合物的选择及其数量和浓度是针对每个油田量身定制的。

商业案例的开发

西科威特 (WK) 商业案例。WK地区的 M 地层是一种碳酸盐、多裂缝致密储层,已生产多年,但采收率开始降低。

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原文链接/JPT
Unconventional/complex reservoirs

Downhole Hydrogen-Generation System Stimulates Challenging Formations in Kuwait

This paper highlights an approach of using active hydrogen to stimulate hard-to-recover formations from candidate-well selection through pilot execution and evaluation.

Oil wells and power lines on the side of the highway.
Source: Ugurhan/Getty Images.

The objective of the pilot trial described in the complete paper was to provide an economic solution to develop tight and hard-to-recover formations within the operator’s fields. These assets represent a major challenge because of their low recovery factor (1–3%), the high cost of available conventional stimulation technologies, low revenue, and inability to sustain production rates.

Introduction

To establish an integrated stimulation solution for tight and heavy oil formations, the concept of using active single-atom hydrogen power to enhance near-wellbore permeability was evolved. This technology is based on downhole hydrogen generation from an in-situ exothermic multistage chemical reaction between two unique hydroreacting agents (HRAs). This reaction generates a huge amount of thermal energy, active hydrogen, and other hot active gases and acid vapors. The selection of HRA compounds, and their amount and concentration, is customized for each field.

Development of Business Cases

West Kuwait (WK) Business Case. The M formation in the WK region is a carbonate, multifractured tight reservoir that had been producing for years but had begun experiencing a low recovery factor.

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