The applications for chemical dosing are found in both on- and off-shore installations, and invariably entail the painstaking engineering of dosing systems which are designed to operate in arduous and sometimes hazardous conditions – robustly and reliably.
2) Chlorine Dioxide
Chlorine dioxide (ClO2) is ideal for upstream gas production during oil and gas operations, as well as other oil and gas water applications. It is a sustainable biocide that meets the requirements for sustainability.
Chlorine dioxide is highly soluble in oil which gives it the unique ability to actually affect the wetability/surface tension of the oil promoting increased movement and flow without leaving any harmful residual. This combined with the chlorine dioxide’s anti-plugging agent effect often yields increases in performance and production that are unobtainable by other methods.
There is a need for control of the downhole environment in the oil patch. The source of microbial contamination is diverse therefore the microbiocidal focus should be to prevent further contamination. For upstream gas production chlorine dioxide can be used for this purpose.
Oxidizers that can target multiple points are very effective. Chlorine dioxide is a dissolved gas and penetrates the microbial cell wall via diffusion performing its oxidative function on the metabolic biochemical components of the microbe
Inadequate microbial control can have a significant impact on downhole corrosion rates and can create both economic cost and sustainability concerns. SRBs are the primary cause of microbial-induced corrosion. Chlorine dioxide can quickly and effectively kill SRBs and oxidize the hydrogen sulfide (H2S) they produce, reducing corrosion rates.
Chlorine dioxide results in lower corrosivity. Oxidizers can be used to provide passivation of metal surfaces. Short-term exposure of ferrous metal to oxidizers can induce an oxide film that helps the metal resist further surface corrosion. The rapid-acting oxidative chemistry of chlorine dioxide with ferrous metals (even at low dosages, low residuals, and short contact times) suggests that it may aid in passivating ferrous metal surfaces.
Careful selection of the right equipment is necessary to achieve the results required. Gee & Co can supply and install suitable Chlorine Dioxide preparation and automatic systems.