Abstract. The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide …
This paper will give a comprehensive study of halite formation and inhibition, which includes halite prediction, development of test method and halite inhibitors, and …
The ScaleSoftPitzer™ program was used to predict the scale formation potential for calcite, gypsum and halite in different brine solutions composed of produced fluids (clean out and spent acid ...
The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide limited inhibition performance. In ...
A comprehensive line of inhibitor chemistries is available to suit various deployment techniques and guard against different types of scale, including conventional carbonate and sulfate scales, halites, silicates, and sulfides. Phosphonates; polycarboxylic acids; tagged and end-capped polymers; environmentally friendly, nonaqueous, or solid ...
In Northern German gas reservoirs, the precipitation of salt from the reservoir water is observed to an increasing extent as recovery progresses. The resulting halite scale causes a significant decrease in production rate, all the way to complete blockage of the flow paths and ultimately the abandonment of wells.
DOI: 10.2118/169764-MS Corpus ID: 62657093; Concept, Design and Implementation of a Halite Scale Mitigation Completion in a Gas Well @inproceedings{Maxwell2014ConceptDA, title={Concept, Design and Implementation of a Halite Scale Mitigation Completion in a Gas Well}, author={Douglas L. Maxwell and …
The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide limited …
Abstract. Halite precipitation from gas reservoir brines can cause significant decreases in hydrocarbon production or even complete blockage of the well. This has led to many gas wells either producing at diminished rates or being abandoned. Production decline related to halite scale is routinely treated with water washes either in a …
The formation of anhydrite and halite scale, which has been observed, was predicted only for the most saline samples. In addition, the formation of anhydrite and/or halite may be related to the localized conditions of increased salinity as water is partitioned into the gas phase during production. ... Based on CO 2 gas analyses averaging 0.57 ...
MeOH performed better than MEG as 10wt% MeOH could prevent hydrate formation when the gas was expanded to about 3338 psia whereas, 10wt% of MEG could not prevent hydrate formation when gas was ...
Halite self-scaling is found with both high-temperature and low-temperature wells [e.g., with 125 and 350°F bottomhole temperature gas/gas …
Abstract. This paper describes a laboratory and modelling study into halite (sodium chloride, rock salt) deposition in mature gas production wells. Halite deposition can result in significant production and integrity issues, and mitigation measures are primarily based upon injection of low-salinity wash water, often coupled with careful control of …
The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide limited inhibition performance. In ...
Halite scale in gas reservoir has been attributed to evaporation [1 ... NaCl) during oil production are considered. The mechanism of halite formation is described, the infl uence of the active ...
Chen et al. (2009) examined halite formation and inhibition under both traditional static and dynamic conditions. The possible mechanisms of halite inhibition are discussed. ... Halite scale formation in gas-producing wells. Chem. Eng. Res. Des., 81 (2003), pp. 352-358. View PDF View article CrossRef View in Scopus Google Scholar.
These are developed by evaporation of formation water to near complete dryness in the CO 2 dominated wellbore fluids. The timing of the water backflow into the well and the mechanism driving it are uncertain, but the very high salinity of the formation water means that the total volume of scale observed could be due to minor volumes of …
Abstract. Scale formation during oil and gas production may cause formation damage, pump failure, blockage of tubing or annulus, and deposits in surface lines and equipment that can result in shutdowns or loss of production. Therefore, the prevention of scale is of considerable interest and concern to the oil and gas industry. …
The Sichuan Basin contains the most prolific marine potash salt deposits in China. Although a vast amount of polyhalite has been found in the Triassic Jialingjiang Formation, the production of soluble potash deposits has yet to begin. The origin and sedimentary environment of polyhalite has remained unclear, and this information could …
Scale formation during oil and gas production may cause formation damage, pump failure, blockage of tubing or annulus, and deposits in surface lines and equipment that can result in shutdowns or ...
Furthermore, due to a long-term drying formation during gas production, the salinity of formation water could reach and even exceed the solubility of halite in the aqueous solution at the later development period of gas reservoirs (Zhang et al. 2019). This will result in a more frequent salt precipitation during late period of gas production.
Formation of barite (BaSO4) scale is a potential problem for unconventional (shale) gas extraction, as the excessive scale can reduce well productivity by plugging the proppant pack.
Abstract. Halite scale has long been a challenge in the oil and gas industry. In recent years there has been a marked increase in the occurrence of this scale type due to the increased development of hotter and deeper gas and gas condensate fields. As …
Theoretically, using mass balance considerations, in our closed system, one single halite crystal of density ρ NaCl = 2100 kg m-3 formed from the brine (S brine, with density ρ brine = 1190 kg m ...
Abstract. Halite scale is a wide spread problem throughout several basins in the United States. This scale can form in surface equipment, downhole tubulars as well as affecting production. Traditional remediation of halite can be accomplished by dissolving the scale in fresh water as well as recycled water. In most cases the operator must factor in …
Halite scale formation in gas-producing wells. Chem. Eng. Res. Des., 81 (3) (2003), pp. 352-358. View PDF View article CrossRef View in Scopus Google Scholar. ... Prediction of Mineral Scale Formation in Wet Gas Condensate Pipelines and in MEG (mono Ethylene Glycol) Regeneration Plants (2006) Doctoral thesis, Trondheim, 209 pp. …
The inhibition of halite mineral scale in oil and gas production is notoriously difficult. High concentrations of halite inhibitors have always provided limited inhibition performance ...
In many cases, this behavior may be attributed to halite scale in the near-wellbore region around the perforated pay zone or within the wellbore. For certain gas wells in the North Sea, regular downhole freshwater treatments lasting half a day are required to restore production. Fig. 1 shows production rates as a function of time. From the end ...
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1. Introduction. Sodium chloride (halite) salt is perhaps the most ubiquitous mineral in nature. Seawater typically contains 3% NaCl; where in formation brine, the NaCl content can be anywhere from 5% and up to NaCl solubility of over 20% [1].Different from many carbonate and sulfate based minerals, halite has an exceedingly higher solubility …
A self-consistent activity model is presented to calculate the effect of methanol on barite, gypsum, celestite, and halite solubility in methanol/water/salt and ethylene glycol/water/salt solutions. The model parameters are derived from experimental studies at 0−6 m ionic strength, 4−50 °C, and 0−90 wt % of methanol and to a lesser …
The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide limited inhibition performance. In ...
The presence of halite scale on the internalsurface of the pore and the associated constriction of thecross-sectionalarea, with the resulting impairmentin perme- …
Therefore, the prevention of scale is of considerable interest and concern to the oil and gas industry. Control of scale, particularly halite in high salinity Bakken brines (total dissolved solids ...
The most common types of inorganic scale that form during the oil and gas production are calcium carbonate (calcite and aragonite); the sulfate salts of calcium (gypsum), strontium (celestite), and barium (barite); the sulfide salts (iron, zinc, lead); and sodium chloride (halite) [16].The chemical reactions and mineral names for most oilfield …
Furthermore, due to a long-term drying formation during gas production, the salinity of formation water could reach and even exceed the solubility of halite in the aqueous solution at the later development period of gas reservoirs (Zhang et al. 2019). This will result in a more frequent salt precipitation during late period of gas production.
