The souring of reservoirs by microbial activity has become a major concern to the oil and gas industry. In the present study, core flood experiments were used to evaluate the efficacy of periodic formaldehyde injection for the control of in situ biogenic reservoir souring. In these floods two reservoir environments were simulated: the near-injection well, and the deep-formation. Formaldehyde treatments were demonsrated to control souring in both enviroments; if the formaldehyde can be transported through the reservoir, in situ biogenic souring should be mitigated.

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