... in the produced water. Two biocides (THPS and glutaraldehyde), as well as the H₂S scavenger, and combinations of biocides with H₂S scavenger, were each tested on an active biofilm in five different dosages ( Table 1 ); with 14 to 16 replicates of each. Table 1 Biocide test matrix...

... an extensive study on a new FeS dissolver. The testing results showed that the new chemistry significantly outperformed 7.5% HCl and THPS (Tetrakis(hydroxymethyl)phosphonium sulfate) based dissolvers for several authigenic minerals (pyrite, marcasite, pyrrhotite, troilite) and different field scales. ¹⁴...

... to determine the mechanism generating these corrosion spikes. Scavenger performance was studied with and without the presence of oxygen. Parameters included in this study were SBS concentration, tetrakis-hydroxymethyl-phosphonium (THPS) concentration, temperature, and pH. Electrolyte simulation software...

... (THNM:DBNPA) GA+QAC PAE C (GA:DMO) THNM PAE D (THPS:THNM^*) CTAC 50,150, 250 PAE E (THPS:THNM (RR)) THPS 112.5,187.5, 250 PAE F (THPS:CTAC) DMO 100, 200, 300 PAE G (THPS:DMO) Glutaraldehyde (GA), 2-hydroxymethyl-2-nitropropane-1,3-diol (THNM), 2, 2-Dibromo-3...

... glutaraldehyde ADBAC DBNPA THPS bacteria elevated temperature sandstone adsorption INTRODUCTION Optimization of antimicrobial efficacy is commonly achieved by the use of biocide combinations. The utilization of diverse antimicrobial chemistries in respect to mechanisms of action, physical/environmental...

... activity, either combination biocides or membrane active biocides were the most effective. biocide oxidizing non-oxidizing oil and gas hydrothermal stability slickwater crosslink gel membrane active fast reactive preservative TTPC TTPC/PQ DBNPA glutaraldehyde glut/quat THPS DMO DMTT THNM...

... phosphonium sulfate (THPS) technologies have been developed that have improved compatibility, at high dose concentrations, with friction reducers and biopolymers used in EOR programmes and fracturing applications. The updated formulations have shown enhanced biocidal efficacy against acid producing bacterial...

...Abstract Since its first application in the UK sector of the North Sea in the late 1980’s, THPS has established a “best-in-class” status for the control of problematic sulfate reducing bacteria (SRB) and the operational problems associated with their metabolic activity. This paper will review how...

... coupon or “cut-out” obtained from the trunkline when a new 6” (15.2 cm) OD subsea tie-in (SSTI) was made at the 3:00 o’clock orientation in 2010. Pipeline Integrity Internal Corrosion Microbiologically Influenced Corrosion MIC Sulfate Reducing Bacteria SRB Hydrogen Sulfide H₂S THPS...

... and recommendations related to “dry” and “wet” lay-ups, including filtration requirements and specific treatments for oxygen scavengers, biocides, and corrosion inhibitors. Hydrostatic Pressure Test biocide glutaraldehyde THPS Sulfate Reducing Bacteria SRB corrosion inhibitor oxygen scavenger ammonium...

..., and metabolisable carbon was added in the form of volatile fatty acids (VFA) in the ratio of 100 acetate: 10 propionate: 1 butyrate by weight. The pH of the injection fluid was between 7.5 and 8 before the addition of THPS and the VFA loading was 111 mg/L, which, if converted entirely to sulfide (i.e. none used...

... supporting evidence for other factors that contribute to an overall reaction mechanism. One factor that could help shed light on the interaction of the two reactive species is that when two speices react, one or both of the reactants should be consumed. If this were the case, THPS and/or bisulfite residuals...

... Reduction (BCSR) theory was able to predict longer term SRB pitting using short-term pitting data in laboratory experiments for MIC in hydrotest. hydrotest SRB MIC seawater THPS model INTRODUCTION Hydrotesting is a common practice to assess pipeline integrity before service. It is different from...

... of the chemically treated fill fluids, particularly with respect to the degradation of the biocide product (THPS) and its ability to mitigate the effects of microbial influenced corrosion (MIC), over extended periods leading to production start-up. The activities performed by the Thunder Horse project team...

...In hydrotest and pre-commissioning activities, the minimal recommended chemical treatment made by BP guidelines ^{1 , 2} for hydrotest/fill fluids includes biocide, oxygen scavenger, and dye. THPS is suited to serve as the biocide in this application. Abstract The Thunder Horse project’s...

... of extraction Oxygen concentration Temperature Condition of the system to be treated Nutrient sources and availability Exposure period Biocides such as glutaraldehyde and THPS mitigate MIC by controlling proliferation of microorganisms such as sulfate reducing bacteria (SRB) and acid producing...

...Non-oxidising biocides, such as TetrakisHydroxymethylPhosphonium Sulfate (THPS), are widely used as part of a microbial control program to alleviate processing and health and safety issues associated with bacterial proliferation in oilfield water systems. However, despite this widespread use...

... the trunkline, after it was returned to service. The primary internal corrosion threat appeared to be from sulfate reducing bacteria (SRBs), based on the observation of 90 ppm H₂S in the gas that accompanied the seawater pushed to the offshore barge/tankage during the foam pig run. THPS (Tetra kis...

... biocide deactivation oxidizer non-oxidizer isothiazolone glutaraldehyde dibromonitrilopropionamide DBNPA bronopol tetrakis(hydroxymethyl)phosphonium sulfate THPS chlorine bromine TABLE 1 DEACTIVATION OF 2.8 PPM CMIT/MIT BIOCIDE AS A FUNCTION OF BISULFITE CONCENTRATION AND pH Sodium...

... for hydrotesting contains microorganisms. Natural seawater contains viruses, prokaryotes, protists (mainly flagellates) and algae ⁶ . The water for hydrotesting can be treated with biocide to avoid internal MIC of the pipeline. THPS (Tetrakis Hydroxymethyl Phosphonium Sulfate) and glutaraldehyde...