Downhole salt precipitation is an increasing issue in mature gas fields of the North Sea. Two novel solutions have been conceptualized and applied, the first being the installation of velocity strings. A case study is presented wherein four velocity strings were set, leading to a strong increase in platform flow rate and the extension of asset life. The major advantage of this solution is that it is relatively simple and extremely robust and does not involve increased operating expense (OPEX). Compensation of evaporation by downhole supplementation of fresh water also is a method of mitigation discussed in the complete paper.
Introduction
This paper describes two successful methods of increasing production performance for gas wells suffering from salt depositional issues.
