Frontiers in Energy Research
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2022
·
IF 3.858
Li Xufeng,Meng Zilong
Gas hydrate is a type of ice like crystals, which could widely form and plug the offshore oil and gas pipelines. In order to reduce the cost of hydrate control in oil and gas transportation, search for new anti-agglomerates (AAs) is always needed. In this work, fourteen different types of polymers from drilling fluid additives were selected and their anti-agglomeration ability on gas hydrate was experimentally studied by using a high-pressure rocking cell. The hydrate volume percentage, slider moving range, and moving velocity were measured for evaluation. Two polymers [acrylamide polymer (AAP) and hydrolyzed polyacrylonitrile ammonium salt (HAPS)] were found to be effective to avoid agglomerating at low hydrate concentration (≤6%). AAP and HAPS could prevent plugging, while the hydrate concentration is lower than 15.12% and 16.92%, respectively. It was speculated that the hydrogen bonding capability of the hydrophilic groups, the length of the hydrophobic chains and polymer molecules, and the antagonism of different functional groups might affect the anti-agglomerating performance of polymers.
研究领域:
化学工程
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石油工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Ming Lei,Jinsheng Sun,Haiyan Zhu,Weian Huang,Zhixiang Cai
The increasing energy demand and environmental pressure require the utilization of high-performance and eco-friendly drilling fluid materials for oil/gas exploration. Herein, a green nanocomposite involving the core structure of silica (SiO 2 ), the resin shell structure of rosin dehydroabietic acid (DHAA) derivative [poly(DHAA- co -styrene) (PDS)], and the crown structure of hydrophilic layer [crosslinked poly(2-acrylamido-2-methyl-1-propanesulfonic acid- co - N , N -dimethylacrylamide) (CAD)] was prepared through semi-continuous emulsion polymerization and utilized as a high-performance and multifunctional additive for drilling fluid. The optimal composition of core, shell and crown was determined to be 0.3: 10: 2 in mass, and the DHAA component accounted for 50 wt% in the shell structure and the molar ratio of 2-acrylamido-2-methyl-1-propanesulfonic acid and N , N -dimethylacrylamide in the crown was 3:7. The core-shell-crown nanocomposite (SiO 2 -PDS-CAD) exhibited a well-organized multi-layered nanostructure with an effective encapsulation of PDS on nano-SiO 2 and CAD on PDS, facilitating a uniform nano-dispersion of SiO 2 -PDS-CAD. The bulky copolymerized rosin-based segments coupled with nano-SiO 2 resulted in high thermal stability of SiO 2 -PDS-CAD and broadened the softening point of raw rosin from 87°C to 141°C. Meanwhile, the environmental assessments of acute toxicity and biodegradability showed that SiO 2 -PDS-CAD was nontoxic and readily biodegradable, and the higher incorporation of rosin components enabled SiO 2 -PDS-CAD more biodegradable in contrast to the non-biodegradability of the analog without rosin. Moreover, SiO 2 -PDS-CAD showed versatile functions in bentonite-based drilling fluid by maintaining high yield points, lowering fluid loss and enhancing nano-porous plugging capacity (100–400 nm), especially at elevated temperatures (140–180°C). A maximum increment of 1200 % on yield point occurred after aging 170°C, and the highest improvement of approximately 72 %-75 % on fluid loss occurred at 150–180°C. It also could effectively inhibit clay swelling and decrease the lubrication coefficient. The enhancement mechanism was revealed to be the core-shell-crown synergistic effects, in which the hydrophilic crown contributed to the dispersion stability of SiO 2 -PDS-CAD and affinity with bentonite clay, and the rigid bridging of core and flexible deformation of rosin shell strengthened the interparticle interactions. The study highlighted a novel strategy for preparing high-value-added rosin-based biomass material for green multifunctional applications in water-based drilling fluids.
研究领域:
材料科学
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石油工程
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环境科学
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产品关联
DOI
高影响因子
Processes
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2025
·Vol. 13
·期 8
·2427
·
IF 2.8
Guowei Zhou,Xin Zhang,Weijun Yan,Zhengsong Qiu
Natural polymer materials are increasingly utilized in drilling fluid additives. Starch has come to be applied extensively due to its low cost and favorable fluid loss reduction properties. However, its poor temperature resistance and high viscosity limit its application in high-temperature wells. This study innovatively introduces for the first time diatomite as an inorganic material in the modification process of starch-based fluid loss additives. Through synergistic modification with acrylamide and acrylic acid, we successfully resolved the longstanding challenge of balancing temperature resistance with viscosity control in existing modification methods. The newly developed fluid loss additive demonstrates remarkable performance: It remains effective at 160 °C when used independently. When added to a 4% sodium bentonite base mud, it achieves an 80% fluid loss reduction rate—significantly higher than the 18.95% observed in conventional starch-based products. The resultant filter cake exhibits thin and compact characteristics. Moreover, this additive shows superior contamination resistance, tolerating 30% NaCl and 0.6% calcium contamination, outperforming other starch-based treatments. With starch content exceeding 75%, the product not only demonstrates enhanced performance but also achieves significant cost reduction compared to conventional starch products (typically containing < 50% starch content).
研究领域:
石油工程
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高分子材料科学
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钻井液技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2018
·Vol. 54
·期 7
·5927-5941
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IF 2.993
Ma Jingyuan,An Yuxiu,Yu Peizhi
The copolymer (PAAN-SiO 2 ) of acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), N -vinylpyrrolidone (NVP) and modified nano-silica (M-SiO 2 ) was synthesized by free radical polymerization in a water solution. The composition, micro-morphology and thermal stability properties of PAAN-SiO 2 were characterized by Fourier transform infrared spectroscopy, thermal gravity analysis and transmission electron microscopy (TEM). The results showed that AM, AMPS and NVP were successfully grafted onto the surface of M-SiO 2 and formed a spherical core–shell structure copolymer. A significant reduction in the filtration volume was achieved after PAAN-SiO 2 added, and this phenomenon was even more pronounced after aging at the high temperature. The filtration volume of base slurry containing 2 wt% of calcium chloride after aging at 180 °C was reduced from 186 to 6 ml after adding 2 wt% of PAAN-SiO 2 , which exhibited a special property of anti-calcium contamination at high temperature. The interaction mechanism between PAAN-SiO 2 and bentonite and calcium ions was analyzed by particle size analysis, scanning electron microscopy, TEM and X-ray diffraction. Because of the stretching of polymer chain under 180 °C that more amide, sulfonic acid groups and cyclic rigid groups were exposed and the strengthening of the connection between PAAN-SiO 2 and clay prevents a large amount of ion exchange between Ca 2+ and clay layers, reducing the agglomeration of clay. Meantime, the distribution of clay particles was more extensive and some particles with a size of 1–10 μm plugged the micro-nano-pores on the filter cake, and eventually the thin and compact filter cake was formed.
研究领域:
高分子化学
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石油工程材料
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胶体与界面科学
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功能纳米材料
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钻井液添加剂
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）