Investigation of Application Conditions of Barium/Strontium Scale Inhibitor in Oilfields

2011 ◽  
Vol 311-313 ◽  
pp. 1097-1101
Author(s):  
Qiang Ke ◽  
Fa Shu Liang
Keyword(s):  
Inhibition Efficiency ◽  
Scale Inhibitor ◽  
Gas Field ◽  
Republic Of China ◽  
Barium Strontium ◽  
Scale Inhibition ◽  
Common Scale ◽  
Gas Standards ◽  
Inhibition Performance ◽  
Temperature Time

In response to the serious barium / strontium – scale in oilfields, we simulated oilfield conditions and investigated the scale inhibition performance of several common scale inhibitors to barium and strontium, by following the protocol from Evaluation Methods of Anti-Scale Agent for Oilfield Use, Petroleum Gas Standards of People’s Republic of China SY/T 5673. The most effective scale inhibitor CD-1 was screened out. With CD-1 as barium / strontium scale inhibitor in the static anti-scale analytical experiments, the dependence of scale inhibition performance on scale inhibitor concentration, saltiness, temperature, time and the system pH was investigated. The application conditions of barium / strontium scale inhibitor in real petroleum and gas field was obtained. Under the optimized application conditions, the mixture scale inhibitor had better scale inhibition efficiency than CD-1 alone.

Formation and Mitigation of BaSO4 Scale in Oil Fields

2015 ◽  
Vol 814 ◽  
pp. 278-285
Author(s):  
Ming Zhu ◽  
Cheng Qiang Ren ◽  
Yuan Yuan Meng ◽  
Li Liu ◽  
Yun Ping Zheng
Keyword(s):  
Inhibition Efficiency ◽  
Oil Fields ◽  
Scale Inhibitor ◽  
Conductivity Method ◽  
Environment Friendly ◽  
Scale Inhibition ◽  
Negative Role ◽  
Corrosion Inhibition Efficiency ◽  
Effects Of Temperature ◽  
Inhibition Performance

The deposition of BaSO4scale is always found in the oilfield. It is difficult to be removed. Therefore, it plays a negative role to the production. The effects of temperature and water chemistry on BaSO4scale have been investigated by using the conductivity method in this work. An environment-friendly copolymer was prepared to control the scaling of BaSO4. The copolymer was proved by static scale inhibition method, and weight-loss test that it has excellent scale inhibition performance and corrosion inhibition efficiency. Furthermore, FTIR spectra was used to prove that the scale inhibitor was polyepoxysuccinic acid (PESA).

Scale inhibitors with a hyper-branched structure: preparation, characterization and scale inhibition mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92943-92952 ◽  
Author(s):  
Henghui Huang ◽  
Qi Yao ◽  
Hualin Chen ◽  
Bailing Liu
Keyword(s):  
Inhibition Efficiency ◽  
Water Bodies ◽  
Inhibition Mechanism ◽  
Industrial Water ◽  
Scale Inhibitor ◽  
Phosphorus Pollution ◽  
Scale Inhibition ◽  
New Type ◽  
Branched Structure

In order to improve the scale inhibition efficiency of existing scale inhibitors for industrial water and to reduce the phosphorus pollution of water bodies, a new type of scale inhibitor with a hyper-branched structure has been developed.

Experimental study on scale inhibition performance of a green scale inhibitor polyaspartic acid

2008 ◽  
Vol 51 (7) ◽  
pp. 695-699 ◽  
Author(s):  
ZhenHua Quan ◽  
YongChang Chen ◽  
XiuRong Wang ◽  
Cheng Shi ◽  
YunJie Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Scale Inhibitor ◽  
Polyaspartic Acid ◽  
Scale Inhibition ◽  
Inhibition Performance

Synthesis and characterization of an ionic liquid–carboxylic acid copolymer scale inhibitor and its scale inhibition performance

2019 ◽  
Vol 19 (5) ◽  
pp. 1463-1472 ◽  
Author(s):  
Wenlin Zhang ◽  
Gongwei Li ◽  
Fei Jin ◽  
Yu Huo ◽  
Tengfei Sun ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Ionic Liquid ◽  
Carboxylic Acid ◽  
Magnetic Resonance ◽  
Acrylic Acid ◽  
Inhibition Efficiency ◽  
Hydrogen Sulfate ◽  
Scale Inhibitor ◽  
Acid Copolymer ◽  
Scale Inhibition

Abstract A phosphorus-free scale inhibitor (ionic liquid–carboxylic acid copolymer) was successfully synthesized by the reaction of 1-sulfobutyl-3-vinylimidazolium hydrogen sulfate (SVIS) and acrylic acid (AA). The structure of the product was characterized by Fourier transform infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance (1H NMR) and carbon-13 nuclear magnetic resonance (13C NMR). Then the scale inhibition efficiency of 1-sulfobutyl-3-vinylimidazolium hydrogen sulfate-acrylic acid (SVIS-AA) copolymer against CaCO3 and CaSO4 was determined. The results indicated that SVIS-AA copolymer showed better scale inhibition efficiency than poly (acrylic acid) (PAA). After that, the effects of temperature and Ca2+ concentration on the scale inhibition efficiency against CaCO3 were studied. Results showed that when the temperature reached 90 °C, the scale inhibition efficiency could still remain 91% at a concentration of 18 mg L−1. When the concentration of Ca2+ reached 1,200 mg L−1, the scale inhibition efficiency could remain 70% at a concentration of 20 mg L−1. At last, the effect of SVIS-AA copolymer on the morphologies of CaCO3 and CaSO4 scale was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD).

Research on Corrosion and Scale Inhibition Performance of HEDP

2012 ◽  
Vol 535-537 ◽  
pp. 1180-1184
Author(s):  
Mao Dong Li ◽  
Bin Zeng ◽  
Lin Yang ◽  
Jun Ming Zhao ◽  
Yu Hui Du ◽  
...  
Keyword(s):  
Corrosion Inhibition ◽  
Concentration Ratio ◽  
Inhibition Efficiency ◽  
Total Iron ◽  
Water Medium ◽  
Boiler Water ◽  
Inhibition Effect ◽  
Scale Inhibition ◽  
Industrial Boiler ◽  
Inhibition Performance

The static scale inhibition method will be used to evaluate the scale inhibition performance of HEDP. In order to study the corrosion inhibition of 20A steel with additive of HEDP in the industrial boiler water medium，the total iron ions in the solution are determined through autoclave static experiments. The results indicated that the scale inhibition efficiency，in the simulation boiler water with a certain concentration ratio and temperature，reached the maximum when CHEDP is 7 mg/L. It has a good corrosion inhibition effect on the 20A steel when the HEDP concentration exceeds 15ppm.

Research on the Scale Inhibition Performance of AA/SAS Binary Polymer

2013 ◽  
Vol 448-453 ◽  
pp. 3949-3953
Author(s):  
Shan Fa Tang ◽  
Hui Liao ◽  
Lei Tian ◽  
Xiao Jie Wang ◽  
Xiao Yang Lei ◽  
...  
Keyword(s):  
Inhibition Efficiency ◽  
Formation Water ◽  
Mass Ratio ◽  
High Concentration ◽  
Binary Polymer ◽  
Scale Inhibition ◽  
High Calcium ◽  
Barium Ion ◽  
Strontium Ions ◽  
Inhibition Performance

The binary polymer AA/SAS was synthesized by acrylic acid (AA) and sodium allylsulfonate (SAS), named as AS and its structure was characterized. Its scale inhibition performance was also investigated for single CaCO3, CaSO4 scales, and composite scales in simulated formation water containing Ca2+, Mg2+, Ba2+ and Sr2+. The results indicate that when adding 50mg/L of the inhibitor, it is 85.05% efficient for CaCO3 inhibition and 98.85% for CaSO4, but only 49.05% and 51.58% for BaSO4 and SrSO4 separately. The scale inhibition performance is obvious in the simulated formation water with high concentration of calcium (1300mg/L) and low barium ion (100mg/L ), the inhibition efficiency are both above 85% at a dosage of 80mg/L. And it can fairly satisfy the demand of inhibiting composite scales (CaCO3 scale, CaSO4 scale, BaSO4 scale and SrSO4 scale), when AS and CT was combined at a mass ratio of 2:1 in high calcium , barium and strontium ions contained formation water, being 95.3% efficient at the dosage of 100mg/L.

scholarly journals Synthesis and Visualization of a Novel Fluorescent-Tagged Polymeric Antiscalant during Gypsum Crystallization in Combination with Bisphosphonate Fluorophore

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 992 ◽  
Author(s):  
Maxim Oshchepkov ◽  
Vladimir Golovesov ◽  
Anastasia Ryabova ◽  
Svetlana Frolova ◽  
Sergey Tkachenko ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Inhibition Efficiency ◽  
Paradoxical Effect ◽  
Scale Inhibitor ◽  
Solid Complex ◽  
Secondary Importance ◽  
Scale Inhibition ◽  
Scale Particle ◽  
Scale Deposition ◽  
Habit Modification

An attempt to reveal the mechanisms of scale inhibition with the use of two different fluorescent-tagged antiscalants at once is undertaken. To reach the goal, a novel 1,8-naphthalimide-tagged polyacrylate (PAA-F2) is synthesized and tested separately and jointly with 1,8-naphthalimide-tagged bisphosphonate (HEDP-F) as a gypsum scale inhibitor within the frames of NACE Standard TM0374-2007. Here, it is found that at a dosage of 10 mg·dm−3 it provides a much higher inhibition efficiency (96%) than HEDP-F (32%). A PAA-F2 and HEDP-F blend (1:1 mass) has an intermediate efficacy (66%) and exhibits no synergism relative to its individual components. The visualization of PAA-F2 revealed a paradoxical effect: an antiscalant causes modification of the CaSO4·2H2O crystals habit, but does not interact with them, forming particles of its own solid complex [Ca-PAA-F2]. This paradox is interpreted in terms of the “nano/microdust” concept, prioritizing the bulk heterogeneous nucleation step, while an ability of the scale inhibitor to block the nucleus growth at the next steps is proven to be of secondary importance. At the same time, HEDP-F does not change the gypsum crystals morphology, although this antiscalant is completely located on the surface of the scale phase. The PAA-F2 and HEDP-F blend revealed an accumulation of both antiscalants in their own [Ca-PAA-F2/Ca-HEDP-F] phase with some traces of HEDP-F and PAA-F2 on the CaSO4·2H2O crystals surface. Thus, the visualization of two different antiscalants separately and jointly applied to gypsum deposition demonstrates differences in phosphonic and polymeric inhibitors location, and a lack of causal relationship between antiscalant efficiency and scale particle habit modification. Finally, it is shown that the confocal microscopy of several fluorescent antiscalant blends is capable of providing unique information on their interrelationships during scale deposition.

Research on the synthesis and scale inhibition performance of a new terpolymer scale inhibitor

2015 ◽  
Vol 73 (7) ◽  
pp. 1619-1627 ◽  
Author(s):  
Yufei Bao ◽  
Meng Li ◽  
Yanqing Zhang
Keyword(s):  
Calcium Carbonate ◽  
Polymerization Reaction ◽  
Molar Ratio ◽  
Scale Inhibitor ◽  
Sodium Styrene Sulfonate ◽  
Scale Inhibition ◽  
High Conversion Rate ◽  
Infrared Spectrometer ◽  
Chelating Ability ◽  
Inhibition Performance

A new terpolymer named β-CD-MA-SSS was produced using free-radical polymerization of β-cyclodextrin (β-CD), maleic-anhydride (MA) and sodium-styrene-sulfonate (SSS) as monomers, with potassium persulfate (KPS) as initiator. Its performance as a scale inhibitor to prevent deposition of calcium carbonate (CaCO3) has been investigated. Experimental results demonstrated that β-CD-MA-SSS performed excellent scale inhibition and exhibited a high conversion rate under the following conditions: initiator consisting of 6%, molar ratio of reaction monomers SSS:MA = 0.8:1, MA:β-CD = 6:1, reaction temperature of 80 °C, reaction time of 6 h, and dropping time of 40 min when MA was dosed as a substrate, and SSS and KPS were dosed as dropping reactants simultaneously. Use of a Fourier transform infrared spectrometer for this inhibitor showed that the polymerization reaction had taken place with the reaction monomers under the above specified conditions. Scanning electron microscopy indicated that the β-CD-MA-SSS had a strong chelating ability for calcium (Ca2+) and a good dispersion ability for calcium carbonate (CaCO3).

Synthesis of New Phosphate and the Evaluation as Scale Inhibitor in Oilfield

2019 ◽  
Vol 814 ◽  
pp. 493-498
Author(s):  
Ren Jun Xu ◽  
Hua Lei He ◽  
Jing Wang ◽  
Hai Peng Hui ◽  
Qiao Na Liu
Keyword(s):  
Calcium Carbonate ◽  
Phosphonic Acid ◽  
Synthesis Method ◽  
Normal Growth ◽  
Inhibition Rate ◽  
Scale Inhibitor ◽  
Composite Scale ◽  
Scale Inhibition ◽  
Ph Range ◽  
Inhibition Performance

Compared with inorganic phosphonates, organic phosphonates have better chemical stability in water treatment, and are not easy to hydrolyze in higher temperature and wider pH range. In this paper, a one-step synthesis method of ethylene diamine tetra (methylene phosphonic acid) sodium (EDTMPS) and methylene phosphonic acid (DTPMPA) were studied. A new phosphate scale inhibitor was prepared and its scale inhibition performance was evaluated. The results showed that the scale inhibition rate increased with the increase of the concentration of synthetic products (EDTMPS, DTPMPA). At the same concentration, compared with DTPMPA, EDTMPS has better scale inhibition performance, and the maximum scale inhibition rate can reach 96.85%. The scale inhibition performance of composite scale inhibitor is better than that of single scale inhibitor, and the scale inhibition rate of the synthesized products can reach more than 90% after compounding. And inhibitory mechanism has been proposed: Because phosphonates effectively control the rate of nucleation. In addition, polyphosphonates can chelate Ca2+, Mg2+ plasma to form monocyclic or bicyclic chelates. This will destroy the normal growth process of calcium carbonate and other crystals, thus preventing the formation of calcium carbonate scale.

scholarly journals The synthesis of polyaspartic acid derivative PASP-Im and investigation of its scale inhibition performance and mechanism in industrial circulating water

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33595-33601
Author(s):  
Xinyu Guo ◽  
Xiaowei Zhao ◽  
Yanhua Xu ◽  
Panpan Zhang ◽  
Yamin Cheng ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Acid Derivative ◽  
Iminodiacetic Acid ◽  
Scale Inhibitor ◽  
Polyaspartic Acid ◽  
Circulating Water ◽  
Synthesis Route ◽  
Scale Inhibition ◽  
Inhibition Performance ◽  
Performance And Mechanism

A polyaspartic acid derivative (PASP-Im) as a novel scale inhibitor was synthesized by a simple green synthesis route with polysuccinimide and iminodiacetic acid as the starting materials.

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