Organic precipitation during the production of hydrocarbons has proven to be a production assurance problem experienced in the majority of oil and gas fields throughout the world. Paraffin and asphaltene deposition occurs in several areas of the production system including: the reservoir, wellbore components including the perforation face and production tubing, surface components such as chokes and on flowlines, and also in production equipment downstream. In an effort to maintain optimum production, removal of existing restrictions is essential, just as minimizing the deposition of same. There is no universally effective treatment for organic deposition. Proper identification of the deposit, design and implementation of the treatment is essential to the cost effective production of oil and gas wells experiencing the problem. The most common methods of removal include: mechanical means, chemicals of various types, heat techniques and micro-organisms. This paper analyzes the results of a chemical treatment exercise executed in the Southwest Soldado Oil Field, an offshore asset owned by the Petroleum Company of Trinidad and Tobago Limited (Petrotrin). A paraffin dispersant-asphaltene inhibitor was applied as a method of cost-effectively optimizing production, in a field within which organic precipitation is inescapable as a result of the crude's nature coupled with conditions necessary for deposition. Successful application of this treatment in eight (8) flowing wells and seven (7) flowline segments resulted in increased production levels within the field, despite the production constraints experienced within the field at the time. As a result of this success, apart from expansion of the exercise and treatment on an annual basis, continuous chemical treatment systems were introduced to the field, as a means of minimizing deposition on flowlines and in flowing and PCP wells.

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