Ultra-Stable Silica Nanoparticles as Nano-Plugging Additive for Shale Exploitation in Harsh Environments

Ma, Lun; Luo, Peng; He, Yi; Zhang, Liyun; Fan, Yi; Jiang, Zhenju

doi:10.3390/nano9121683

Cited by 35 publications

(16 citation statements)

References 46 publications

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“…However, the modified nano-plugging agent has insufficient temperature resistance and cannot be used in deep and ultra-deep wells with higher temperature. 20 Liu et al (2019) described shale gas wellbore instability and leakage, and a micro–nano polymer microsphere plugging agent was developed by emulsion polymerization, the plugging agent can form a continuous and dense plugging layer on the well wall through the mechanism of “adsorption-bridging-deformation filling” and “chemical plugging agent,” preventing pressure transmission and filtrate intrusion. Moreover, it has good rheological, filtering, and lubricating properties, which can effectively block shale micro- and nanoscale fractures, inhibit shale hydration, and provide drilling fluid technical support for shale gas drilling and development.…”

Section: Introductionmentioning

confidence: 99%

Preparation of the Tetrameric Poly(VS-St-BMA-BA) Nano-Plugging Agent and Its Plugging Mechanism in Water-Based Drilling Fluids

et al. 2022

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In response to the current problem that micron-scale plugging agents cannot effectively plug shale nanopores and fractures, tetrameric poly(VS-St-BMA-BA) nanoparticles were synthesized by the Michael addition reaction using sodium vinyl sulfonate, styrene, butyl methacrylate, and butyl acrylate as raw materials. The nanoparticles poly(VS-St-BMA-BA) were characterized by infrared spectroscopy, particle size analysis, and thermogravimetric analysis. The particle size distribution of poly(VS-St-BMA-BA) at room temperature ranged from 62.17 to 96.44 nm, with a median particle size of 75.8 nm, and could withstand high temperature of 359.5 °C. The effects of poly(VS-St-BMA-BA) on the rheological parameters of drilling fluid and the effects of different temperatures on the median particle size were investigated by the drilling fluid performance testing methods and high-temperature stability testing methods. The results showed that the apparent viscosity, plastic viscosity, yield point, and high temperature and high pressure water loss of drilling fluid gradually decreased with the increase in poly(VS-St-BMA-BA) dosage; when the addition of poly(VS-St-BMA-BA) was 2.0%, the overall performance of drilling fluid was better, the filtration loss was 4.4 mL, and the drilling fluid had good water loss wall building performance. The median particle size of poly(VS-St-BMA-BA) was 132.60 nm (the particle size at room temperature was 75.8 nm) after standing for 16 h at 180 °C, indicating that poly(VS-St-BMA-BA) has good high-temperature stability and dispersion stability. The plugging performance and plugging mechanism of poly(VS-St-BMA-BA) under extreme conditions (high temperature) were investigated by the plugging performance test method and pressure transfer method. The results showed that the plugging rate of artificial mud cake and artificial core reached 48.18 and 88.75%, respectively, when the amount of poly(VS-St-BMA-BA) was added at 2.0%. In the pressure-transfer experiments, poly(VS-St-BMA)-BA) could invade the 2 mm position of the nanopore fracture on the core surface and form a sealing barrier layer to prevent the further invasion of liquid. Combined with the pressure-transfer experiment, it shows that poly(VS-St-BMA-BA) can enter the nanopore and fracture at a certain distance under the action of formation pressure and keep accumulating to form a tight blockage, which can effectively prevent the filtrate from entering the nanopore fracture of the shale formation. Poly(VS-St-BMA-BA) is expected to be used as a promising nano-plugging agent in water-based drilling fluids.

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Section: Introductionmentioning

confidence: 99%

Preparation of the Tetrameric Poly(VS-St-BMA-BA) Nano-Plugging Agent and Its Plugging Mechanism in Water-Based Drilling Fluids

et al. 2022

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“…They are applicable either selectively or non-selectively [10], to manage reservoir heterogeneity by targeting thief zones. Profile modification and in-depth flow Fuels 2021, 2 305 diversion techniques including colloidal dispersion gels (CDGs) [11], preformed particle gels (PPGs) [12], small microgels [13], and temperature activated polymers (TAPS) [14] have been discussed in other literature.…”

Section: Introductionmentioning

confidence: 99%

Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Obino

Yadav

2021

Fuels

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One highly undesirable characteristic of mature assets that inhibits oil recovery is high water production. Polymer gel treatment is a popular conformance improvement technique applied in this regard due to its cost effectiveness and proved efficiency. Despite this popularity, optimum performance of polymer hydrogels in water shut off is inhibited by excessive aggregation, difficulty in controlling gelation, and their instability at high temperature and high salinity reservoir conditions. To address these shortcomings, research on the application of nanoparticles (NPs) in polymer hydrogels to manage thermal stability and salinity sensitivity has significantly increased in the recent past. By incorporating metal-based NPs, silica or graphene at nanoscale; the gel strength, storage modulus, salinity tolerance and thermal stability of commonly used polymers have been greatly enhanced. In this paper, the advances in experimental studies on polymer-based nanocomposites are discussed and field experiences from adoption of polymer composites reviewed.

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“…Nanomaterials have also been a hot area of research in oil fields in recent years. Various nanomaterials, such as graphene oxide, 22 silica, 23,24 laponite, ZnO, 25 and CuO, 26 are added into drilling fluids as a filtrate reducer or plugging material 27 mides and surfactants, can mitigate sedimentation but cannot endure long-term gravitational action and Brownian motion yet. In addition, excessive thickening is not favorable for drilling fluids.…”

Section: Introductionmentioning

confidence: 99%

“…Nanomaterials have also been a hot area of research in oil fields in recent years. Various nanomaterials, such as graphene oxide, silica, , laponite, ZnO, and CuO, are added into drilling fluids as a filtrate reducer or plugging material due to their nano size. However, nanoparticle agglomeration and sedimentation have been barriers for their usage for a long period.…”

Section: Introductionmentioning

confidence: 99%

Zwitterionic Silica-Based Hybrid Nanoparticles for Filtration Control in Oil Drilling Conditions

Yang

Xie

et al. 2021

ACS Appl. Nano Mater.

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Water-based drilling fluids (WBDFs) that are susceptible to high temperature and saline pollution always exhibit poor ability to control fluid loss and seriously threaten the operation security of oil well drilling; especially, ultradeep well WBDFs that can simultaneously tolerate high salinity and temperature of over 200 °C are difficult to obtain. Herein, a zwitterionic silica-based hybrid nanomaterial (ZSHNM) with a spherical morphology (50−150 nm) was synthesized, and its filtration performance was thoroughly investigated. ZSHNM showed an extraordinary long-term (≥10 months) dispersion stability even at high concentrations in water and possessed remarkable tolerance to high temperature and salinity. Typically, merely adding 2 wt % ZSHNM in WBDFs could achieve an excellent filtration performance even at 240 °C, and with 11 wt % CaCl 2 or 36 wt % NaCl added, it showed the best performance to our knowledge. The results suggested that the sodium bentonite (Na-Bent) dispersion could be well stabilized in the presence of ZSHNM even at high temperature and with the presence of cations. Additionally, the silicate core could improve the thermal stability of ZSHNM, whereas the zwitterionic shell could form complexes with cations and further mitigate the aggregation of Na-Bent particles. Thus, the particle size distribution in WBDFs could be finely regulated similar to that in neat Na-Bent dispersion. Furthermore, given the zwitterionic ZSHNM filled in the micro−nanopores among the Na-Bent particles, a compact and lowpermeability filter cake was readily formed and ultimately reduced the drilling fluid loss during the filtration process. This work provided a versatile strategy to address the high temperature and high salinity tolerance of WBDFs synchronously, thereby pioneering a new way to develop high-performance drilling additives for ultradeep and complex wells.

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Ultra-Stable Silica Nanoparticles as Nano-Plugging Additive for Shale Exploitation in Harsh Environments

Cited by 35 publications

References 46 publications

Preparation of the Tetrameric Poly(VS-St-BMA-BA) Nano-Plugging Agent and Its Plugging Mechanism in Water-Based Drilling Fluids

Preparation of the Tetrameric Poly(VS-St-BMA-BA) Nano-Plugging Agent and Its Plugging Mechanism in Water-Based Drilling Fluids

Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Zwitterionic Silica-Based Hybrid Nanoparticles for Filtration Control in Oil Drilling Conditions

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