Characterization of a novel aluminum-based shale stabilizer

Zhang, Shifeng; Qiu, Zhengsong; Huang, Weian; Cao, Jie; Luo, Xi

doi:10.1016/j.petrol.2013.02.008

Cited by 29 publications

(9 citation statements)

References 11 publications

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“…Shale formations consist of consolidated clay minerals and contain native fractures and nano-pores. This results in their ultra-low permeability (van Oort 2003;Zhang et al 2013;Zhong et al 2011) and serious clay swelling when encountering water, a main factor causing hole collapse, wellbore weakening, and stuck pipes in drilling (Zhong et al 2015). The composition of clay minerals is a major factor contributing to swelling capability as some clay minerals are non-swelling.…”

Section: Introductionmentioning

confidence: 99%

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Weijia

et al. 2018

Pet. Sci.

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Graphene oxide (GO) nano-sheets were synthesized using a modified Hummers' method from graphite powder. The Raman spectrum of GO displayed a D-band at 1359 cm -1 and a G-band at 1594 cm -1 . The I D /I G value of GO was calculated to be 0.97, suggesting the formation of new sp 2 clusters upon reduction. A method was designed to investigate the assembly of the GO/montmorillonite (MMT) composite. After the addition of GO, the typical peaks of montmorillonite in FT-IR spectra shifted, indicating the assembly between GO and MMT. The D-band and G-band reduced sharply in the GO/MMT composite. More importantly, the D-band (1344 cm -1 ) and G-band (1574 cm -1 ) shifted significantly and the I D / I G value of the GO/MMT composite was calculated to be 1.13, showing a change in the GO structure. In the addition of 0.04 wt% GO to MMT, the value of interlayer space (d) was up to 13.0 Å measured by XRD due to the insertion of GO into MMT. The evident increases in contents of carbon atoms (26.59%) and nitrogen atoms (3.44%) indicate that GO was successfully combined with MMT. The nano-pores and clay sheets were not observed in the SEM image of GO/clay, but obvious wrinkles, while flexible sheets were observed in the typical scanning electron microscopy images of GO. This further proves that GO was combining with clay. The TEM image shows that the GO nano-sheets were tiled on the surface of MMT sheets. This observation suggests that a stable assembly structure was formed between GO sheets and MMT sheets. The change in particle size of MMT with the addition of GO shows that interaction occurred between GO sheets and MMT sheets, which was further confirmed by the results of zeta potential. Adsorption and insertion were the main mechanisms to assemble GO and MMT.

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Section: Introductionmentioning

confidence: 99%

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Weijia

et al. 2018

Pet. Sci.

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“…As shown in Figure 10 , the P(St-MMA) latex particles could be deformable to internally bridge and seal pore throats and microfractures of shale cores, and the aluminum complex would precipitate when the drilling fluid filtrate is exposed to formation water and the precipitation could block and seal pore throats and microfractures [ 36 ]. What is more, the P(St-MMA) latex particles and aluminum complex could act synergistically to reduce pore pressure transmission and increase membrane efficiency of shale cores, thus improving shale stability in drilling engineering.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Latex Particles as Potential Physical Shale Stabilizer in Water-Based Drilling Fluids

Liu

Qiu

Huang

et al. 2014

The Scientific World Journal

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The poly(styrene-methyl methacrylate) latex particles as potential physical shale stabilizer were successfully synthesized with potassium persulfate as an initiator in isopropanol-water medium. The synthesized latex particles were characterized by Fourier transform infrared spectroscopy (FT-IR), particle size distribution measurement (PSD), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA). FT-IR and TGA analysis confirmed that the latex particles were prepared by polymerization of styrene and methyl methacrylate and maintained good thermal stability. TEM and PSD analysis indicated that the spherical latex particles possessed unimodal distribution from 80 nm to 345 nm with the D90 value of 276 nm. The factors influencing particle size distribution (PSD) of latex particles were also discussed in detail. The interaction between latex particles and natural shale cores was investigated quantitatively via pore pressure transmission tests. The results indicated that the latex particles as potential physical shale stabilizer could be deformable to bridge and seal the nanopores and microfractures of shale to reduce the shale permeability and prevent pore pressure transmission. What is more, the latex particles as potential physical shale stabilizer work synergistically with chemical shale stabilizer to impart superior shale stability.

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“…The shale core plug permeability tests were conducted using Autolab‐1000 servo‐hydraulic operated system manufacture by New England Research Company. This system uses pore pressure transmission test that is a usual assessment for pore fluid flowing in shale to determine permeability of core plugs, and the low permeability assembly enables the measurement of low permeability materials of 5 nD to 50 μD …”

Section: Methodsmentioning

confidence: 99%

Experimental study of permeability reduction and pore size distribution change due to asphaltene deposition during CO₂huff and puff injection in Eagle Ford shale

Shen

Sheng

2017

Asia-Pacific J Chem Eng

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Many laboratory and simulation studies regarding gas injection enhanced oil recovery method in shale reservoir have been performed and shown good results. However, one problem not investigated is the asphaltene precipitation and deposition problem. In conventional reservoirs, the permeability reduction caused by asphaltene plugging and adsorption has been observed and well studied. In shale reservoirs, the deposition, if any, will be more critical.In this work, experimental studies were conducted to investigate the effect of asphaltene deposition on the pore size reduction and permeability reduction in shale core samples during the CO 2 huff and puff injection process using a dead oil sample from a Wolfcamp shale reservoir. A decrement of pore with a diameter size in the range from 100 to 800 nm and an increment of pore with a diameter size smaller than 100 nm were observed after 6 cycles of CO 2 huff and puff injection. The result indicates the existence of pore plugging and asphaltene adsorption during the gas injection process. The experimental results also showed a 47.5-nD permeability reduction after 6 cycles of CO 2 huff and puff injection. Compared with the original permeability of the shale core, 126 nD, the permeability reduction is more than one-third of the original permeability.

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Characterization of a novel aluminum-based shale stabilizer

Cited by 29 publications

References 11 publications

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Preparation and Characterization of Latex Particles as Potential Physical Shale Stabilizer in Water-Based Drilling Fluids

Experimental study of permeability reduction and pore size distribution change due to asphaltene deposition during CO₂huff and puff injection in Eagle Ford shale

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Characterization of a novel aluminum-based shale stabilizer

Cited by 29 publications

References 11 publications

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Preparation and Characterization of Latex Particles as Potential Physical Shale Stabilizer in Water-Based Drilling Fluids

Experimental study of permeability reduction and pore size distribution change due to asphaltene deposition during CO2huff and puff injection in Eagle Ford shale

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Experimental study of permeability reduction and pore size distribution change due to asphaltene deposition during CO₂huff and puff injection in Eagle Ford shale