JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Haiyan Dong,Tianle Li,Shaocong Pang,Yuxiu An
There are a large number of nano-micron pores on the surface of the rock layer, and during the drilling process, water molecules will penetrate into the formation through these nano-micron pores, causing hydration and expansion of the rock, causing instability of the wellbore and other problems. Nano-micron plugging agents can effectively seal the nano-micron pores in the formation, reducing the hydration and expansion of the formation. This paper synthesized the ternary copolymer (AAK) using modified nano silica (KH-570), acrylamide (AM), and 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) as raw materials, and used it as a plugging agent in water-based drilling fluids. The characterization and performance of AAK were studied using Fourier transform infrared spectroscopy, particle size analyzer, transmission electron microscopy, and thermogravimetric experiments. The plugging performance was evaluated using microporous filter membrane temperature and pressure tests, liner swelling tests, immersion test, and contact angle tests. In addition, its tackiness and salt resistance were also tested. The results indicate that the particles of AAK are nanoscale particles, which can effectively seal the nano and micro pores in rock blocks. At the same time, AAK has good temperature and salt resistance. The addition of AAK does not significantly change the rheological properties of the drilling fluid and can be used as a plugging agent in water-based drilling fluids.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2020
·Vol. 56
·期 4
·601-611
·
IF 0.405
Zhang Yihang,He Miao,Song Jianjian,Xu Mingbiao,Xu Peng
Carbonate reservoirs in Asmari block of Missan oilfield are characterized by complex geological characteristics. Temporary plugging is commonly used for effective damage control caused by the working fluid when drilling in such complex multi-pressure reservoirs and for preventing leakage, blowout, and collapse in long open hole wells. In this paper a new temporary plugging drilling fluid formulation system is proposed, designed for the low permeability carbonate reservoir containing H 2 S and CO 2 in the target block. The system contains a specially designed acid-soluble temporary plugging agent DSK-1 combined with HCOONa and modified biopolymer VS-A flow pattern regulator; modified starch water loss reduce agent, and DSP antioxidant. The parameters of the system, including temperature stability, resistance to formation water pollution, inhibition capacity, and stability to acids and acid gases, were evaluated in a series of experimental tests. The plugging ability was evaluated by experiments on cores received from the target block. The results showed that the plugging removal and recovery rate of the drilling fluid system was up to 86.3%, which can effectively meet the target requirements, and provide guidance and reference for the follow-up study of temporary plugging in low permeability carbonate reservoirs.
研究领域:
石油工程
·
地质学
✓ 已验证
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 15
·1999
·
IF 4.9
Wenzhe Li,Pingya Luo,Xudong Wang
Lost circulation is a major challenge in oil and gas drilling operations, severely restricting drilling efficiency and compromising operational safety. Conventional bridging and plugging materials rely on precise particle-to-fracture size matching, resulting in low success rates. Self-healing gels penetrate loss zones as discrete particles that progressively swell, accumulate, and self-repair in integrated gel masses to effectively seal fracture networks. Self-healing gels effectively overcome the shortcomings of traditional bridging agents including poor adaptability to fractures, uncontrollable gel formation of conventional downhole crosslinking gels, and the low strength of conventional pre-crosslinked gels. This work employs stearyl methacrylate (SMA) as a hydrophobic monomer, acrylamide (AM) and acrylic acid (AA) as hydrophilic monomers, and graphene oxide (GO) as an inorganic dopant to develop a GO-based self-healing organic–inorganic hybrid plugging material (SG gel). The results demonstrate that the incorporation of GO significantly enhances the material’s mechanical and rheological properties, with the SG-1.5 gel exhibiting a rheological strength of 3750 Pa and a tensile fracture stress of 27.1 kPa. GO enhances the crosslinking density of the gel network through physical crosslinking interactions, thereby improving thermal stability and reducing the swelling ratio of the gel. Under conditions of 120 °C and 6 MPa, SG-1.5 gel demonstrated a fluid loss volume of only 34.6 mL in 60–80-mesh sand bed tests. This gel achieves self-healing within fractures through dynamic hydrophobic associations and GO-enabled physical crosslinking interactions, forming a compact plugging layer. It provides an efficient solution for lost circulation control in drilling fluids.
研究领域:
石油工程
·
材料科学
·
化学工程
·
地质学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Liu Lu,Luo Yuquan,Pu Xiaolin,Yang Bai,Wang Hongru,Luo Pingya,Fu Zhiyong
Effective pore and fracture plugging typically requires the integration of various types and sizes of particles, ranging from nanoscale to microscale, to minimize drilling fluid invasion into the formation. Here, we report novel thermosetting silica nanoparticles decorated with resin (RSNP), which not only retain their nanoscale distribution even at high temperatures but also promote the formation of micrometer-sized particles through interactions with clay in drilling fluids. Characterizations using Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis and Differential Scanning Calorimetry (TGA-DSC), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM) were employed to confirm the chemical structure of the synthesized silica nanoparticles and their interaction with clay in the drilling fluid. The plugging effectiveness was systematically assessed using various filter media and natural shale rock samples. TEM and SEM images revealed a narrow, monodisperse particle size distribution of the synthesized silica nanoparticles in the nanoscale, which were found to adsorb on the edges and surfaces of clay lamellae. Original pores and fractures were effectively sealed by silica nanocomposites of comparable size. The strong adsorption of silica nanocomposites on clay particles facilitates clay flocculation in the water phase and expels water molecules from the clay interlayer due to the intercalation and plugging effects of the silica nanocomposites, thereby inhibiting water invasion. Due to the thermosetting nature of the silica nanocomposites, which encapsulate and bridge clay particles at high temperatures, the drilling fluid evolves from a monodisperse to a bimodal particle size distribution, particularly under high-temperature conditions. This transition results in the formation of micrometer-sized particles in water-based drilling fluids, effectively matching the pore and fracture sizes ranging from nanoscale to microscale. These findings offer a novel strategy for designing nanocomposites for multi-stage plugging, optimizing additive usage while minimizing drilling fluid invasion into porous formations.
研究领域:
材料科学
·
纳米技术
·
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Kai Shan,Zhengsong Qiu,Qi Yin,Qingzhen Cui,Dandan Su,Hanyi Zhong,Xin Zhao
For the purpose of efficient temporary plugging and self-removal of the plugging of reservoir formations, the thermally induced expandable and acid-generating temporary plugging agent (TAPA) was prepared with acrylonitrile (AN), methacrylic acid (MAA), N,N-dimethylacrylamide (DMAA), and butyl acrylate (BA) as the shell monomers as well as the carboxylate esters with high boiling points as the core material. The TAPA was structurally characterized, and the properties were studied. The results showed that the TAPA had a good spherical structure with a median particle size (D50) of 16.03 μm. The initial expansion temperature Tstart of the TAPA was 134.75 °C, and its maximum expansion temperature Tmax was 197.77 °C. The surface was hydrophilic and negatively charged, with excellent shear strength and sealing. The TAPA was suitable for temporary plugging and self-removal of the plugging of the reservoir formation with a temperature of 160 °C. The release of core materials and the effect on self-removal of plugging were not significantly affected with different salinities, weak acid or weak alkali environments, or a small quantity of hydrocarbons. With addition of 1–3 wt % TAPA, the rheological property of water-based drilling fluid changed slightly, but the filtration loss reduced, suggesting a good compatibility of the TAPA with the drilling fluid. Results of plugging and plugging removal experiments in fractured reservoir formations and permeable reservoir formations showed that the TAPA improved the strength of the temporary plugging layer with the elastic deformation due to thermal expansion and realized self-removal of the plugging by corroding the temporary plugging layer with carboxylic acid hydrolyzed from the carboxylic ester released, thereby decreasing the backflow pressure of oil and gas wells in the production stage. The results provided a new method and technological idea for efficient temporary plugging and self-removal of the plugging of reservoir formations.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POWDER TECHNOLOGY
·
2019
·
IF 3.413
Xuechen Tang,Wanli Kang,Bobo Zhou,Yongbo Gao,Changxiao Cao,Shujun Guo,Muhammad Wassem Iqbal,Hongbin Yang
Polymer/nano-SiO 2 composite microspheres (PNSCMs) were synthesized via inverse suspension polymerization with 3-methacryloxypropyltrimethoxysilane (MPS) modified SiO 2 as the reinforcing filler. The influences of these polymerizable nanoparticles on the swelling behavior, mechanical property, thermal stability, viscoelasticity and dispersion stability were examined in detail. Moreover, the plugging behaviors were investigated by sand pack tests. The results indicate that the introduction of these modified nanoparticles revealed a significant enhancement on the comprehensive properties of PNSCMs. By varying the content of MPS-modified SiO 2 , the environmental sensitivity of the microspheres’ swelling behavior was reduced. Besides, the mechanical property, thermal stability and viscoelasticity were greatly improved by increasing the SiO 2 loading. Compared with SiO 2 -free ones, PNSCMs exhibited better dispersion stability and plugging performance, and the maximum plugging rate reached 93.64%, which was increased by 14.69%. These PNSCMs studied can realize in-depth profile control in reservoirs and have great application prospects in the further enhanced oil recovery research.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2024
·
IF 6
Zhe Xu,Jin-Sheng Sun,Jing-Ping Liu,Kai-He Lv,Xiao-Dong Dong,Zong-Lun Wang,Tai-Feng Zhang,Yuan-Wei Sun,Zhi-Wen Dai
As drilling wells continue to move into deep ultra-deep layers, the requirements for temperature resistance of drilling fluid treatments are getting higher and higher. Among them, blocking agent, as one of the key treatment agents, has also become a hot spot of research. In this study, a high temperature resistant strong adsorption rigid blocking agent (QW-1) was prepared using KH570 modified silica, acrylamide (AM) and allyltrimethylammonium chloride (TMAAC). QW-1 has good thermal stability, average particle size of 1.46 μm, water contact angle of 10.5°, has a strong hydrophilicity, can be well dispersed in water. The experimental results showed that when 2 wt% QW-1 was added to recipe A (4 wt% bentonite slurry+0.5 wt% DSP-1 (filtration loss depressant)), the API filtration loss decreased from 7.8 to 6.4 mL. After aging at 240 °C, the API loss of filtration was reduced from 21 to 14 mL, which has certain performance of high temperature loss of filtration. At the same time, it is effective in sealing 80–100 mesh and 100–120 mesh sand beds as well as 3 and 5 μm ceramic sand discs. Under the same conditions, the blocking performance was superior to silica (5 μm) and calcium carbonate (2.6 μm). In addition, the mechanism of action of QW-1 was further investigated. The results show that QW-1 with amide and quaternary ammonium groups on the molecular chain can be adsorbed onto the surface of clay particles through hydrogen bonding and electrostatic interaction to form a dense blocking layer, thus preventing further intrusion of drilling fluid into the formation.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 8
·635
·
IF 5.3
Xinying Cui,Chengwen Wang,Weian Huang,Shifeng Zhang,Haiqun Chen,Bo Wu
During drilling operations, lost circulation frequently occurs, leading to significant loss of drilling fluids which causes environmental damage and increasing drilling costs. To address the problem of fracture plugging, gel materials have emerged as an ideal solution due to stable physicochemical properties and excellent environmental compatibility. However, most existing gels exhibit poor stability and low mechanical strength under high-temperature conditions. To overcome these limitations, high-temperature-resistant phase-conversion stiffened dual-network hydrogel for oil-based drilling fluids was developed. Phase-conversion was realized by immersing synthesized double-network hydrogel in ethylene glycol (EG), polyethylene glycol (PEG), and glycerol (Gly), optimizing and enhancing its mechanical properties, followed by plugging performance evaluations. Experimental results demonstrated that the phase-conversion stiffened gels achieved significantly improved compressive strength and plugging efficiency at elevated temperature. The GC-MS results indicated that dehydration and reagent exchange occurred during immersion, with change in the solid content of the sample. After being treated by white oil at high temperature, the oil phase almost replaced the water phase in the gel. The results of ATR-IR confirmed the formation of hydrogen bonds in the gel. TGA data revealed that PEG enhanced the thermal stability of the gel, EG negatively affected thermal stability, and Gly had negligible influence. The enhancement in gel strength primarily stems from the increase in solid content caused by phase transformation. Dehydration and multiple hydrogen bonds formed between organic reagent molecules and polymer chains in the gel have a synergistic enhancement effect.
研究领域:
石油工程
·
材料科学
·
钻井液技术
·
聚合物水凝胶
·
提高采收率
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Mengjiao Yang,Yingjie Xu,Xiaozhou Xin,Chengjun Zeng,Yuanshi Li,Cheng Lin,Yanju Liu,Yuanyuan Guo,Jinsong Leng
Congenital heart defects (CHDs) are one of the most common congenital malformations, accounting for ≈30% of all congenital malformations. Interventional implantation of occlusion devices is becoming the preferred treatment for CHDs. However, current occlusion devices suffer from serious problems, such as thrombosis, slow endothelialization, imprecise localization, abrasion, displacement, etc. Here, a multifunctional drug-carrying fiber platform with structural similar to the extracellular matrix is innovatively designed to develop 4D printed cardiac occlusion devices, with characteristics of efficient anticoagulation, proendothelialization, and precise localization. Biomimetic ligament structures are designed to achieve a similar mechanical response to myocardial tissue, which helps to synergize deformation and reduce tissue wear. A structural design method for biomimetic personalized multilevel occlusion devices is proposed, facilitating further improvement of sealing reliability. The radiopaque 4D printed shape memory composites are developed, realizing the complete visualization and precise localization of the device in vivo. The novel 4D printed cardiac occlusion device provides an effective way to reduce the risk of complications and contributes to versatility. It is expected to be a next-generation multifunctional repair device for personalized treatment of CHDs.
研究领域:
生物医学工程
·
心血管病学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 6
·1205
·
IF 3.2
Qingsong Zhang,Huaqiang Sheng,Jinliang Li,Jinhu Li,Hao Zhang
In order to address the issue of wind leakage leading to spontaneous coal combustion in goafs during gob-side entry mining, a KH570 silane coupling agent (SCA)-modified vinyl acetate–ethylene (VAE)/cement-based flexible spraying sealing material was developed. The mechanical properties and wind leakage sealing performance of the material were evaluated using specialized testing equipment. Furthermore, molecular dynamics simulations and microstructural characterization techniques were utilized to assess and model the interface compatibility of the material. The experimental results demonstrate that KH570 significantly enhanced the material’s mechanical properties. Following modification, the material exhibited increases in the maximum tensile strength, compressive strength, and flexural strength by 53%, 38%, and 29%, respectively. KH570 not only promotes the formation of additional calcium silicate hydrate (C-S-H) gel through cement hydration, but also establishes Si-O-Si chemical bonds with cement hydration products and hydrogen bonds with the VAE emulsion. This functions as a “molecular bridge”, significantly enhancing the interface performance of the composite. The interaction between the organic and inorganic phases contributes to the formation of an interpenetrating network structure, imparting excellent compressive, flexural, and tensile deformation resistance to the material. The wind leakage of the spray-modified material was reduced by 2.7 times compared to the unmodified material, significantly improving its sealing performance under mining-induced pressure conditions. This enhancement effectively minimizes spontaneous combustion in mined-out coal areas caused by wind leakage, thereby ensuring safer mining operations.
研究领域:
材料科学
·
分子动力学
·
采矿工程
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2024
·
IF 3.8
Yongquan Han,Zhixue Yu,Zijun Guan,Rui Ma,Yuzhou Hu
Supramolecular gel can be used to seal fractures and pores in the formation during oil and gas drilling and production. In this study, a supramolecular gel plugging agent based on hydrophobic association was prepared by free radical polymerization of acrylamide, octadecyl methacrylate, sodium dodecyl sulfate and other monomers by micellar copolymerization. The forming time, rheology, swelling, mechanical properties and plugging properties of supramolecular gels were studied. The experimental results show that the formation time of supramolecular gel plugging agent is controllable, and it has excellent viscoelastic recovery ability in a certain range of shear strain and scanning frequency. When the compression amount is close to 88.3%, the compressive stress reaches 3.82 MPa. Meanwhile, the swelling performance of supramolecular gel was good, and the equilibrium swelling degree reached 22.1% after 188 min swelling in 15% NaCl brine solution. In 1% NaCl solution, the equilibrium swelling degree of supramolecular gel reached 32.5%. In addition, supramolecular gel has strong formation bonding ability, good plugging performance, plugging rate is greater than 95%, can effectively reduce the leakage and improve the plugging effect of low permeability layer. It is of reference and guiding significance for the long-term plugging of heterogeneous and malignant leakage formations.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Xinying Cui,Chengwen Wang,Weian Huang,Shifeng Zhang,Haiqun Chen,Bo Wu
Carboxylized graphene oxide (GO-COOH)-silica (SiO 2 ) composite (GO-COOH/SiO 2 ) was synthesized in two-steps, and can be applied as plugging additive during drilling operations of shale strata. In the synthetic rout, improved carboxylation method was adopted to have more carboxyl groups grafted on graphene oxide, and nanosilica was synthesized by sol–gel/emulsion technique. The preparation of GO-COOH/SiO 2 composite was achieved by dispersing SiO 2 nanoparticles in GO-COOH solution. XRD and Raman spectroscopy showed that the interlayer spacing of GO-COOH/SiO 2 was 1.36 nm, which was higher than that of GO (0.84nm) and GO-COOH (0.92nm). According to SEM and TEM, particle size of synthesized SiO 2 sphere was estimated to be 150 nm, and there were more grown SiO 2 spheres than wrapped SiO 2 particles in the GO-COOH/SiO 2 . The more carboxyl groups offers more nano SiO 2 distributed points. Compared to single nanosilica material, the SiO 2 particles in the composite was more evenly distributed and agglomeration was reduced. Plugging properties test results indicated that GO-COOH/SiO 2 composite had better sealing performance than SiO 2 , GO and GO-COOH. To evaluate influence of GO-COOH/SiO 2 addition on water-based drilling fluid properties, comparative tests were conducted. The experimental results revealed that introduction of GO-COOH/SiO 2 can reduce filtration loss and enhance plugging capability and thermal tolerance of water-based drilling fluid. Therefore, GO-COOH/SiO 2 can act as a promising nanoplugging additive for shale formation.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）