The world consumption of hydrocarbons is projected to increase by some fifty percent in the next twenty years. Yet, many of the countries supplying the world's insatiable demand will, themselves, become net oil and gas importers in the very near future. It becomes ever more important, therefore, to maximize the productivity of each and every well. While many new wells benefit from improved drilling and completion practices, there are a significant number of mature wells that are still capable of producing at economic rates, if properly stimulated. One of the simplest and most cost effective methods to do this is by matrix acidising.
Acidising has established itself as an indispensable technique for enhancing production from hydrocarbon reservoirs worldwide. Over the years, research scientists and engineers have developed and improved many chemicals and additives to enhance the efficiency of these acid systems, as well as reduce the health, safety and environmental impact they have on operations. Despite huge improvements in the last decade, many issues and concerns still exist today. Handling, mixing, storage, pumping and disposal of acid and acid additives remain critical concerns in the industry.
In response to these concerns, new operational methods using specialized equipment, improved mixing techniques and new acid systems have been developed. This paper discusses the current practice, reviews its shortcomings and introduces these improved methods for enhancing HSE practices and optimizing operational efficiency in offshore operations.
Finally, actual implementation of the technique in various offshore scenarios is discussed, describing the HSE and logistical advantages of the process, as well as the resulting synergies.