Hongbin Yang

China University of Petroleum - East China

Many oilfields around the world are using enhanced oil recovery methods to maximize oil production. Longterm water flooding processes have led to water channeling in mature reservoirs, which is a severe problem in oilfields. Polymer gel is widely used as a plugging agent to reduce water production. Previously, the conventional polymer gel is extens...

In view of the short effective period of conventional foam for water shutoff during oil and gas reservoir development, a strong stability gel foam system is proposed in this work. By comparing the foam properties of different foaming systems, the optimized formulation of foam system is “0.3% SDS (sodium dodecyl sulfate) + 0.4% HPAM (partially hydro...

pH-Responsive wormlike micelles (WLMs) have attracted lots of attention due to their abundant advantages, for example, ease of adjustment and strong reversibility. We have learned that the degree of protonation of diethylenetriamine (DETA) varies with pH, and the anionic sodium dodecyl sulfate (SDS) can connect with cationic groups. Inspired by thi...

Polymer flooding technology has become the most widely utilized chemical flooding technology in the world. The polymer structure gradually grows from linear to branched and hyperbranched as reservoir variability increases and polymer flooding technology advances. In this study, the nano-SiO2 was first controllably modified, and subsequently, a seri...

In order to solve the uncontrollable swelling ratio and degradation time and insufficient strength of conventional self-degradable temporary plugging agent (CSD-TPA), a controllable self-degradable temporary plugging agent (SD-TPA) was proposed. A series of SD-TPA were prepared with free radical polymerization, and the SD-TPA was synthesized by dif...

Foam flooding technology can effectively enhance oil recovery (EOR) and has conformance control in heterogeneous reservoirs. However, the stability of foam migrating through porous media is still a challenge with individual surfactant. Herein, we developed viscoelastic surfactant (VES) via the synergisms of anionic (sodium dodecyl sulfate, SDS) and...

CO2 flooding is often used in low permeability reservoirs, but there is general fracture in the reservoir, resulting in the problem of gas channeling. To achieve anti-gas channeling in deep formation, acrylamide (AM), sodium p-styrenesulfonate (SSS) and dimethyl diallyl ammonium chloride (DMDAAC) were used as functional monomers, N′ N-methylene bis...

Surfactants are effective for imbibition enhanced oil recovery (IEOR) in tight sandstone reservoirs because of their ability to change rock wettability and reduce oil-water interfacial tension (IFT). Different surfactants have different IEOR, and some surfactants even have a negative effect on IEOR. Thus, the selection of an optimum surfactant is n...

Polymers are generally applied to enhance foam stability and boost the efficiency of foam flooding for enhanced oil recovery (EOR). In low-permeability reservoirs, the polymers can unavoidably damage the formation. In this study, a novel viscoelastic surfactant system was developed by combining zwitterionic surfactant erucic acid amide propyl hydro...

Hydrophobic polymer microsphere (PM-C16) was synthesized by adding cetyl dimethylallyl ammonium chloride (C16) to study the mechanism of salt resistance. The structure of PM-C16 was analyzed by Fourier transform infrared spectrometric analyzer (FTIR), scanning electron microscope (SEM) and atomic force microscopy (AFM). The kinetic characteristics...

Surfactant-based wormlike micelles (WLMs) have been proven to be efficient in improving oil recovery due to their high viscosity and low oil/water interfacial tension (IFT). In this study, a novel WLMs oil displacement system was developed by mixing zwitterionic surfactant (Erucylamido propyl betaine, EAPB) and anionic surfactant (Sodium dodecylsul...

For the past decades, long-term water flooding processes have to water channeling in mature reservoirs, which is a severe problem in oilfields. The development of better plugging ability and cost-effective polymer microspheres is a key aspect for the control of excess water production. Research on polymer microspheres applicable in a heterogeneous...

Benefiting from the closed wellbore space for heat-carrying fluid circulation, the wellbore self-circulation technology can effectively avoid the problems of wellbore scaling, corrosion, formation deficit, and reinjection capacity decline in the traditional geothermal mining technology. However, its applicability and how to enhance the heat extract...

The combination of pH-responsive hydrotropes and cationic surfactants is a novel way to construct pH-responsive surfactant aggregates. Herein, in order to investigate the chain length influence of hydrotrope on surfactant aggregate, three hydrotropes were formed from p-hydroxybenzaldehyde (HB) and added amine (hexylamine (HA), octylamine (OA), dode...

In todays’ world, there is an increasing number of mature oil fields every year, a phenomenon that is leading to the development of more elegant enhanced oil recovery (EOR) technologies that are potentially effective for reservoir profile modification. The technology of conformance control using crosslinked microgels is one the newest trends that i...

Improved oil recovery (IOR) includes enhanced oil recovery (EOR) and other technologies (i.e. fracturing, water injection optimization, etc.), have become important methods to increase the oil/gas production in petroleum industry. However, conventional flooding systems always encounter the problems of low efficiency, high cost and complicated synth...

In order to solve the problem of conventional preformed particle gel (PPG) with relatively high cost and poor strength and shearing resistance, a preformed sawdust gel particle (S-PPG) with a more superior performance than PPG was presented. A series of S-PPG with different mass ratio of sawdust particles to gelling liquid were prepared with free r...

De-emulsification performance and mechanism of β-CD reverse demulsifier for amphiphilic polymer oil in water (O/W) emulsion, Journal of Molecular Liquids (2021), doi: https://doi. Abstract: In order to evaluate the performance and mechanism of de-emulsification for amphiphilic polymer produced oil in water (O/W) emulsion,the environmentally friendl...

De-emulsification performance and mechanism of β-CD reverse demulsifier for amphiphilic polymer oil in water (O/W) emulsion, Journal of Molecular Liquids (2021), doi: https://doi. Abstract: In order to evaluate the performance and mechanism of de-emulsification for amphiphilic polymer produced oil in water (O/W) emulsion,the environmentally friendl...

Responsive wormlike micelles (WLMs) consisted of cationic surfactants and organic-acids are fascinating due to their reversible molecular recognition properties. However, it is unknown how the structure of organic-acids alters the stimuli-responsiveness of WLMs systems. Herein, the peculiar nature of temperature-responsive behaviors in three WLMs s...

The “graft onto” method is used to obtain the “stimuli-responsive water-soluble polymer” with low concentration, where 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and n-hydroxysulfosuccinimide sodium salt as catalyst and sodium polyacrylate as backbone chain. The molecular structure of the polymer is characterized by Nuclear Magneti...

The application of spontaneous emulsification method during oil displacement provides a low-cost and environmentally friendly approach to enhance oil recovery for unconventional reservoirs. A surfactant-polymer mixture system composed of hydrophobically modified polyvinyl alcohol (HPVA) and cetyltrimethylammonium bromide (CTAB) with the ability of...

In order to evaluate the performance and mechanism of de-emulsification for amphiphilic polymer produced oil in water (O/W) emulsion,the environmentally friendly β-cyclodextrin (β-CD) was chosen as a reverse demulsifier. Viscosity of amphiphilic polymer solution (APP4) and de-emulsification rate of the O/W emulsion were determined by rheometer and...

Microemulsion, because of its excellent interfacial tension reduction and solubilization properties, has wide range of applications in the petroleum industry, especially in improved oil recovery (IOR). Herein, the concept, types and formation mechanism of microemulsion were primarily introduced. Then, the preparation and characterization methods we...

CO2 capture and reinjection process (CCRP) can reduce the used CO2 amount and improve the CO2 storage efficiency in CO2 EOR projects. To select the best CCRP is an important aspect. Based on the involved equipment units of the CCRP, a novel techno-economic model of CCRP for produced gas in CO2 EOR and storage project was established. Five kinds of...

Blockage is a common problem in the development of water-flooding reservoirs. The key to solve this problem is to determine the composition and distribution rules of the blockage. In this work, the location distribution and components of blockage were analyzed by one-dimensional (1D) and two-dimensional (2D) cores, and x-ray diffraction and differe...

Nanoemulsions consist of small particle size, uniform dispersion, and long-term stability, making them suitable for use in enhanced oil recovery for low-permeability reservoirs. In this paper, an ultrastable oil-in-water nanoemulsion was prepared using the emulsification inverse phase method at a constant temperature. Rheology, multiple-light scatt...

Surfactants have been widely used in enhanced oil recovery. The zwitterionic surfactant possesses a high critical micelle concentration, that its use requires an increased concentration and thus it is uneconomical. In this paper the use of erucic acid amidopropyl- betaine (EDAB, C22) and sodium alkyl sulfate (SDS) is proposed to construct a worm-li...

In order to ensure the emulsification function of chemical flooding and simultaneously relieve the difficulty in demulsification of produced fluid in heavy oilfield, a pH-responsive surfactant HB-HA⁻ (4-hydroxybenzaldehyde (HB) and n-hexylamine (HA)) was constructed based on dynamic imine bond. The molecular structure and its pH-responsive property...

A novel viscoelastic N2 foam (0.12% sodium dodecyl sulfate + 0.18% erucyl dimethyl amidopropyl betaine) with ultra-low interfacial tension and alkali-free was developed. With the conditions of Xinjiang Oilfield (45℃, c (salinity)= 7880 mg/L), the foam performances were investigated by the modified Rose-Miles method. The modified Rose-Miles method i...

In order to study the interaction between the sodium dodecyl sulfate (SDS)/ n-hexylamine (NHA) composite aqueous solution, the supramolecular system had been constructed at the optimal molar ratio of 1:1 at high mass concentration. Based on the experimental results, supramolecular system formation mechanism was proposed according to the determinati...

In order to prepare materials with controllable properties, changeable microstructure, and high viscoelasticity solution with low polymer and surfactant concentration, a composite is constituted by adding surfactant (sodium dodecyl sulfate, SDS) to hydrophobically associated water‐soluble polymer (abbreviated as PAAC) solution. The viscoelasticity,...

CO 2 flooding has been widely applied for enhanced oil recovery (EOR) in recent years, while the difficulty in demulsification of the produced fluid has become an urgent problem due to the specific physical and chemical properties of CO 2 flooding process. In this study, the crude oil from Block Hei-59 by CO 2 flooding was used to prepare simulated...

Dynamic covalent bonds are reversible and responsive, the external environment can cause change of molecular configuration of the compound system, leading to changes in the microscopic morphology of the micelles, thereby achieving intelligent control of the fluid state. Therefore, this work used cationic surfactant cetyltrimethylammonium bromide (C...

The rheology and microstructural behaviors of viscoelastic surfactant solutions induced by different organic acids are fascinating. However, the viscosity and viscoelasticity behavior of some surfactants such as oleyl amidopropyl betaine (OAPB) surfactant is very poor even at high concentrations. To improve these properties at low concentrations, a...

CO2 flooding has been widely applied in lots of low permeability reservoirs. After extensive CO2 injection, some reservoirs began to show serious gas channeling problems. CO2 foam had been successfully used to solve gas channeling problems due to its advantages of water selective plugging features (not plugging oil). In this paper, a novel CO2 foam...

Polymer flooding technology has become a common flooding technology in medium-high permeability reservoirs. With the gradual development of high salinity reservoirs, higher requirements for the salt resistance of polymers have been put forward. Herein, a novel binary copolymer amphiphilic polymer (PAMA) with salt thickening property was synthesized...

CO2 flooding has been widely applied for enhanced oil recovery (EOR) in recent years, while the difficulty in demulsification of the produced fluid has become an urgent problem due to the specific physical and chemical properties of CO2 flooding process. In this study, the crude oil from Block Hei-59 by CO2 flooding was used to prepare simulated pr...

Viscoelastic surfactant (VES) fracturing fluids, with the advantages of low residues, complete gel breaking, and low formation damage, have received considerable attention in hydraulic fracturing techniques. However, the complicated synthesis process and high costs limit the widespread application of VESs. Herein, a VES fracturing fluid composed of...

High-frequency pulsed alternating current field (HFPACF) has attracted attentions owing to its excellent performances of eliminating short circuit, saving energy and reducing environmental pollution. To study the coalescence mechanism of aqueous drops in water-in-oil (W/O) emulsions under HFPACF, micro-behavior of dispersed drops for W/O emulsion w...

For the past decades, long-term water flooding processes have led to water channeling in mature reservoirs, which is a severe problem in oilfields. The development of better plugging ability and cost-effective polymer gel is a key aspect for the control of excess water production. Research on polymer gel applicable in a heterogeneous reservoir to p...

Both amphiphilic polymer and surfactant can be used to enhance oil recovery (EOR) by emulsifying crude oil. In this work, the emulsifying ability and emulsion stability of combination system constituted by amphiphilic polymer (APC16) and anionic surfactant (erucyl dimethyl amidopropyl betaine, EDAB) were studied. The bottle test was selected to eva...

In order to improve the shear resistance of amphiphilic polymer gel, cyclodextrin polymer is selected to construct inclusion polymer gel named as CADC inclusion gel. The critical shear condition was determined to be 4000 rpm and 7 min through rheological method. Under this condition, variety of instruments such as rheometer, scanning electron micro...

In order to investigate the effect of host-guest inclusion on the stability of emulsion, two host-guest inclusion complexes (CDP-APC16 and CDP-APP4 respectively) were constructed by using cyclodextrin polymer (CDP) and amphiphilic polymers(named APC16, APP4). The optimal inclusion ratios of APP4 and APC16 with CDP were explored and the O/W emulsion...

For investigating the types and formation mechanisms of residual oil after surfactant imbibition, the easy-emulsifying surfactant Sodium Dodecylbenzene Sulfonate (SDBS) and ultra-low interfacial tension surfactant Sodium Oleate (SOL) were selected. The visual micromodel was adopted to observe the oil morphologies, while the rheometer and the emulsi...

In recent years, the use of dynamic chemical bonds to construct stimulus-responsive micelle systems has received increasing attention. However, current reports focus on the construction of dynamic covalent bond surfactants using dynamic chemical bonds, and the method of applying dynamic covalent bonds to hydrotropes has not been reported yet. In th...

Polymeric surfactant flooding is an effective method to improve oil recovery, and the stability of the emulsion is closely related to the effect of surfactant flooding. The preparation method for a surfactant-stabilized emulsion is relatively simple, and the emulsion produced by the existing device cannot simulate the real formation conditions. To...

In order to solve the problem of poor acid-resistant of preformed particle gel (PPG) as conformance control material in reservoirs with supercritical CO2 flooding, acrylamide (AM), N,N′-methylene bisacrylamide (MBA) and dimethyldiallylammonium chloride (DMDAAC) were used to prepare an acid-resistant preformed particle gel (AR-PPG) by radical polyme...

During the past 20 years, polymer flooding has become a successful enhanced oil recovery (EOR) technique for mature reservoirs with high water cut and recovery percent around the world. However, the high bulk viscosity of polymer solutions could slow down the separation rate of the crude oil emulsion and make it difficult to treat the produced flui...

Amphiphilic polymers have been widely studied and applied in oil fields as effective enhanced oil recovery (EOR) agents. However, the viscosity of their aqueous solution is low at low concentration. In order to improve their poor viscosity-thickening ability at low concentrations, a combined system was used by mixing a zwitterionic surfactant (eruc...

In recent years, with the further development of old oilfields, in order to further improve the oil recovery, they must be conformance controlled. Among various types of conformance control methods, polymer gels composed of polymers and crosslinkers have attracted widespread attention because of their efficiency and low costs. Among them, organic c...

Low elastic polymer microsphere (L-EPM) had been a promising conformance control agent with the wide application of polymer microspheres. The filtration loss characteristics, core damage and selective conformance control performance of L-EPM conformance control system were studied. The results showed that L-EPM system had less damage to the matrix...

Due to a growing number of wells being in late stages of operation, there is an increasing demand for introduction of new integrated solutions reducing wellbore fluid watercut. Eventually, watercut reduction enables a prolonged operation of encroached wells and improves recovery of residual oil reserves. Polyacrylamide is the most available and ind...

In polymer flooding process, the poor solubility of polymer and the wrap of incompletely dissolved polymer particles with heavy oil lead to the generation of complicated blockage, which seriously affects the normal production of wells. Therefore, how to fabricate an effective blockage removal agent is particularly important. Based on the blockage f...

Emulsions stabilized by the supramolecular systems with sodium polyacrylic acid and amphiphilic polymers with different hydrophobic monomer contents were investigated. Multiple-light scattering was used to characterize the stability of emulsions. Optical microscopy and particle size analyzer were utilized to determine the droplet size distributions...

The Gemini-like surfactants have been constructed by compounding N-erucamidopropyl-N,N-dimethylamine (UC22AMPM) and o-phthalic acid (o-PA), m-phthalic acid (m-PA), or p-phthalic acid (p-PA), and named as o-EAPA, m-EAPA, p-EAPA respectively. It is well known that inorganic salts have vital effects on surfactants aggregates, and herein the influence...

For the past decade, hydraulic fracturing has been an effective way of stimulating low-permeable reservoirs to increase hydrocarbon productivity. The development of clean and cost-effective fracturing fluid is a key aspect of the hydraulic fracturing process. Studies on smart wormlike viscoelastic surfactant (VES) fluid applicable in fracturing hav...

In Enhanced oil recovery methods, CO2 is an excellent injecting fluid than water because of its prominent properties which includes non-flammability, non-polarity and non-toxicity. The reservoir pressure is over minimum miscibility pressure (MMP), it also provides for miscible displacement process of multi-contact. The CO2 injection process has bee...

Profile control treatment is an effective technology to improve reservoir heterogeneity and decrease the watercut. Polymer gel has become the most widely used profile control agent. The most commonly used polymer in polymer gels is HPAM, which has poor adaptability in high temperature and high salinity reservoirs resulting in poor gel performance....

pH-responsive wormlike micelles (WLMs) have been widely constructed by the mixture of surfactants and organic acids. However, the effect of different ortho-substituents on the rheological behaviors of WLMs remains unclear. Here in, three pH-responsive WLMs were prepared by combining N-erucamidopropyl-N, N-dimethylamine (UC22AMPM) with o-phthalic ac...

Functional polymer flooding has been proven to be capable to improve oil recovery by mobility control and emulsification. However, the contribution degree of emulsification function of polymer flooding to oil recovery has not been clarified. This work experimentally investigated the ability of two functional polymers (RH-4 and KLP-6) with emulsific...

Amine-surfactant can be converted to be cationic surfactant in water solution saturated with CO2, which can enhance their foaming ability and foam stability, and the foaming ability can be switched off or on by CO2 or replacing with N2 with heating, so the amine-surfactants have great potential for smart mobility control to gas channeling during CO...

Hydrophobically modified polyacrylamide (HMPAM) is widely used in petroleum development, whereas it still confronts challenges in high salinity reservoirs. In this work, a twin-tailed modified polyacrylamide was introduced and characterized by FT-IR, ¹H NMR and TGA. The rheological properties and thickening mechanism were investigated by viscosimet...

Low elastic polymer microsphere (L-EPM) has been proposed as a functional polymer microsphere these years. L-EMP has the excellent deformation ability in the porous medium due to the low storage modulus. Herein, one kind of L-EPM with storage modulus (G′) of 23.6 Pa was prepared by inverse suspension polymerization. The shear resistance of L-EPM wa...

The amphiphilic polymer supramolecular system with high viscosity was constructed by electrostatic interaction between the cationic amphiphilic polymer and polyorganic acid, which expanded the thickening mode of amphiphilic polymer system. The optimum conditions for the construction of amphiphilic polymer supramolecular system and its thickening ab...

Worm-like micelles (WLMs) system can be obtained by mixing long-chain cationic surfactants and polybasic organic acids in aqueous solution. However, the effect of different organic acid structures on the rheological behavior of WLMs system has not been researched. Herein, a novel pH-responsive wormlike micelles system (EATA) was constructed by the...

Dynamic covalent bond is widely used to fabricate stimuli responsive system due its reversible molecular recognition properties. In this study, we developed a pH-responsive morphology transition system based on mixture of cationic surfactant CTAB and two nonamphiphilic precursors, 4-hydroxybenzaldehyde (HB) and octylamine (OA), at the molar ratio o...

A new fluorescent polymer was prepared by copolymerization of acrylamide and a modified rhodamine B (RhB). Fourier transformation infrared spectrometer and nuclear magnetic resonance confirmed the successful modification of RhB and the synthesis of fluorescent polymer. The rheological and fluorescence properties were studied by fluorospectrophotome...

Recently, the composite materials developed by the combination of polymer and inorganic nanomaterial have gained various attraction for researchers. In this paper, the negative charged silica nanoparticles (silica NPs) with hydroxyl groups on the surface were mixed with the amphiphilic polymer having positive charged hydrophobic groups to form a NP...

A quantitative method to study the association behavior of the hydrophobically modified polyacrylamide (HMPAM) in aqueous solution was proposed based on host-guest inclusion. Scanning electron microscopy (SEM), dynamic light scattering (DLS), rheometer and fluorescence probe were also used to investigate its association behavior for comparative stu...