Statoil Experiences and Consequences Related to Continuous Chemical Injection

Abstract

Abstract Current completion solutions using Continuously Chemical Injection system faces challenges to prevent plugging of the capillary line. Where as Completion engineering principles have in the past mainly focused on the physical properties of the injection valve and mandrel, the chemists focus have been finding effective chemicals. We now experience that we need to have a system focus. The Chemical Injection Systems are not covered by any industry standards such as ISO or API, some elements are covered but none with focus on the entire system. As such Statoil has experienced that there are many other aspects and challenges linked to Chemical Injection systems that has not been explored in the past, and as a consequence Statoil has initiated an enhanced program to gain more knowledge and experience to better understand the physical and practical interlinks related to Continuous Chemical Injection. Understanding the behaviour of chemicals in vacuum or near-vacuum pressure regimes in the upper part of the capillary line is one of the keys to understand the challenges related to these completions. Through communication with other operators throughout our industry, we understand that the challenges we have experienced are also relevant for others well operations. Statoil believe in an open environment where experiences are shared within the industry to improve our and others operations and to develop more robust solutions for the future.