Network simulation for formation impairment due to suspended particles in injected water

Feng, Qihong; Li, Shang; Han, Xiaodong; Wang, Sen

doi:10.1016/j.petrol.2015.06.027

Cited by 23 publications

(9 citation statements)

References 28 publications

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“…where 3 ( ) represents the three-dimension groundwater DIC dynamics. Equation 7is the famous Riccati Equation, where the parameters , , , , and are allowed to be changing with [15][16][17][18]. Equations (2) and (4) are both simple forms of (7) and hence are also special forms of the famous Riccati Equation.…”

Section: The Major Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption

Wang

Chen

Zhang

et al. 2016

International Journal of Polymer Science

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This paper advances “nanodeserts” as a conjecture on the possibility of developing the hierarchical structured polymeric nanomaterials for enhancing abiotic CO2fixation in the soil-groundwater system beneath deserts (termed as quasi-photosynthetic CO2absorption). Arid and semiarid deserts ecosystems approximately characterize one-third of the Earth’s land surface but play an unsung role in the carbon cycling, considering the huge potentials of such CO2absorption to expand insights to the long-sought missing CO2sink and the naturally unneglectable turbulence in temperature sensitivities of soil respiration it produced. “Nanodeserts” as a reconciled concept not only indicate a conjecture in nanotechnology to enhance quasi-photosynthetic CO2absorption, but also aim to present to the desert researchers a better understanding of the footprints of abiotic CO2transport, conversion, and assignment in the soil-groundwater system beneath deserts. Meanwhile, nanodeserts allow a stable temperature sensitivity of soil respiration in deserts by largely reducing the CO2release above the deserts surface and highlighting the abiotic CO2fixation beneath deserts. This may be no longer a novelty in the future.

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Section: The Major Resultsmentioning

confidence: 99%

“…Differential, difference, and dynamic equations are used for quantitative analysis in the engineering and natural sciences [15][16][17][18]. This suggests us trying to develop some differential equations to describe the dynamics of CO 2 dissolution and absorption beneath deserts.…”

Section: Introductionmentioning

confidence: 99%

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption

Wang

Chen

Zhang

et al. 2016

International Journal of Polymer Science

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“…In recent years, there are increasing interests in pore-scale modeling and great progress has been made. Pore network modeling is no longer limited to two-phase flow and the computation of relative permeability curves (Knudsen et al, 2002;Gielen et al, 2004;Hassanizadeh, 2010, 2011;Jerome and Yannick, 2012;Blunt et al, 2013;Feng et al, 2015). Effects of wettability, wetting hysteresis, and mass transfer between phases have also been probed by using pore network model.…”

Section: Pore Network Modelingmentioning

confidence: 99%

“…Effects of wettability, wetting hysteresis, and mass transfer between phases have also been probed by using pore network model. Besides, some more applications have been developed, e.g., modeling of three-phase flow, non-Newtonian fluid, and formation impairment (Feng et al, 2014;Li et al, 2017;Watson et al, 2017). In this section, mechanisms of particles variation and its mathematic description in the proposed pore-network model in introduced in detailed.…”

Section: Pore Network Modelingmentioning

confidence: 99%

Mechanisms of reservoir pore/throat characteristics evolution during long-term waterflooding

Wang

Han

Dong

et al. 2017

Adv. Geo-Energ. Res.

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Formation pore structure and reservoir parameters change continually during waterflooding due to sand production, clay erosion, and pressure/temperature variation, which causes great challenge in geological modeling and simulation. In this work, the XA Oilfield, a block with more than 20 years' waterflooding history, is used as an example to better understand the fundamental evolution mechanisms of reservoir pore network characteristics over long time waterflooding. We performed a large number of core analyses and experiments to obtain formation parameters (e.g., permeability, porosity, relative permeability, and etc.) at different development stages. The comparison illustrates that reservoir permeability can not only decrease with clay plugging, but also increase by the detachment of fine particles and even the destruction of microscopic structure. We also observed that the point/line contacts among grains decreases, the pore network connectivity increases, the clay content reduces and the rock trends to be more hydrophilic with increasing water injection. Moreover, we developed a pore network model to simulate the variation of formation parameter. The model parameters are also compared and analyzed to get a qualitative understanding of the evolvement laws, which will provide a useful guidance for reservoir accurate modeling.Keywords: Reservoir parameter variation, permeability, water flooding, pore network model, core analysis.Citation: Wang, S., Han, X., Dong, Y., et al. Mechanisms of reservoir pore/throat characteristics evolution during long-term waterflooding.

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“…Poorly consolidated sandstone has the characteristics of shallow buried depth, weak compaction, high pore and high permeability, poor cementation. Injection pressure will increase with the increase of water injection time [4], [5]. Oil production was got badly affected.Acidification is long-term conventional method adopted to plugging-removal of water injection wells in Bohai oilfield, but blockage removal effect is not ideal, due to the limitation of acidification validity period.…”

Section: Introductionmentioning

confidence: 99%

Water Injection Fracture Pressure and Fracture Propagation Investigating in Poorly Consolidated Sandstone

Fan¹,

Deng²,

Lin³

et al. 2018

IJCEA

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Predictions of fracture initiation and propagation pressure are an essential prerequisite to determine reasonable injection pressure for poorly consolidated sandstone. Most models for hydraulic fracturing based on elasticity mechanics are not applicable for poorly consolidated rocks. The fluid-solid coupling model based on elastic theory of porous media for poorly consolidated sandstone is established to analyze fracturing modes and fracture initiation pressure by adopting the maximum tensile stress criterion and the Mohr-Coulomb criterion, and the calculation methods of water injection fracture pressure and water injection fracture propagation pressure are obtained in this paper. The study shows that fractures are mainly caused by shear failure and propagation direction is parallel to the maximum horizontal stress. The vertical and tangential effective stress are reduced with the increase of bottom-hole injection pressure. But the radial effective stress is just the opposite. So the transformation of the three principal effective stress values will occur with the increase of water injection pressure. The fractures paralleled to the radial direction of borehole are more easily propagate to formation interior when radial stress becomes intermediate principal stress. The work provides important guidance to determine the construction parameters micro-fracturing in water injection wells.

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Network simulation for formation impairment due to suspended particles in injected water

Cited by 23 publications

References 28 publications

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption

Mechanisms of reservoir pore/throat characteristics evolution during long-term waterflooding

Water Injection Fracture Pressure and Fracture Propagation Investigating in Poorly Consolidated Sandstone

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Network simulation for formation impairment due to suspended particles in injected water

Cited by 23 publications

References 28 publications

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO2Absorption

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO2Absorption

Mechanisms of reservoir pore/throat characteristics evolution during long-term waterflooding

Water Injection Fracture Pressure and Fracture Propagation Investigating in Poorly Consolidated Sandstone

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Product

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Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption

Nanodeserts: A Conjecture in Nanotechnology to Enhance Quasi-Photosynthetic CO₂Absorption