New technology for heavy oil exploitation wastewater reused as boiler feedwater

Heins, Bill; Xiao, Xie; Yan, Deng-chao

doi:10.1016/s1876-3804(08)60016-6

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…Heat transfer characteristics of superheated steam The intensity of steam heat transfer in the wellbore and formation is usually measured by heat transfer coefficient in thermodynamics. The physical meaning of heat transfer coefficient is the unit heat pass through the unit heat transfer area in the per unit time under 1 o C temperature difference [5][6][7] . Obviously, the greater the heat transfer coefficient, the more the heat transfer per unit time.…”

Section: Properties Of Superheated Steammentioning

confidence: 99%

Improvements of Superheated Steam Stimulation in Secondary Development of Heavy Oil Reservoir

Wu²,

Fan

et al. 2012

AMR

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With superheated steam, there is no direct relationship between temperature and pressure, Therefore, at a particular pressure it is possible for superheated steam to exist at a wide range of temperatures higher than that of its saturated steam. The heat transfer coefficient is 1/150-1/250 as much as that of saturated steam during heat transferring, and it takes a relatively long time to cool, during which time the steam is releasing very little energy and transmitted long distances. The mechanisms of superheated steam stimulation are mainly pointed to the performance of crude oil viscosity reduced, flow environment improved, rock wettability changed, oil displacement efficiency improved. Physical simulation shows that oil displacement efficiency by superheated steam is 6-12% higher than that of saturated steam at the same temperature, and under the condition of carrying the same heat, superheated steam enlarged the heating radius by about 10m, oil steam ratio increased by 0.7. Superheated steam stimulation was put into Kazakstan’s heavy oil reservoir after two cycles of saturated steam stimulation. The average daily oil production was 2-4 times that of saturated steam stimulation, which improved heavy oil production effectively. The secondary heavy oil thermal recovery by superheated steam stimulation applied in marginal heavy oil reservoirs achieved satisfactory effect.

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Section: Properties Of Superheated Steammentioning

confidence: 99%

Improvements of Superheated Steam Stimulation in Secondary Development of Heavy Oil Reservoir

Wu²,

Fan

et al. 2012

AMR

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“…According to some calculations, losses represent more than 50% of the energy used in SAGD [7]. Finally, a number of efforts have been made to recover and clean the water produced in the free water phase and in the water/oil emulsion contained in the recovered fluids [8,9].…”

Section: Introductionmentioning

confidence: 99%

Experiments on Steam Injection into Preformed Steam Chambers of Various Shapes for Maximum Condensate Recovery

Medina,

García,

López Villa

et al. 2023

Fluids

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Recently, in a previous study, we experimentally showed the existence of an optimal injected steam mass flow rate, per unit length, ϕopt, which produces the maximal recovery of condensate in a preformed steam chamber with an elliptical cross section of a horizontal semi-major axis. Mutatis mutandis, in this work, we present experimental studies in preformed steam chambers: one elliptical and the other circular. In both cases, we also found the existence of unique optimal values. These configurations try to recreate the steam condensation at a given time-lapse, as it would occur during the growth stage of the steam-assisted gravity drainage (SAGD) process: a method used in the recovery of heavy and extra-heavy oil from homogeneous reservoirs. Finding the optimal mass flow rates in the actual recovery process could be useful in the design of optimized SAGD processes.

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“…This emulsion is then pumped to the surface, where the bitumen is separated and the produced water is treated and reused for additional steam generation. After separation of the steam, about 20% of the initial volume remains for disposal as highly concentrated boiler-blowdown (BBD) wastewater, characterized with high pH, elevated temperature, and excessive concentrations of total dissolved solids (TDS) and dissolved organic matter (DOM) …”

Section: Introductionmentioning

confidence: 99%

“…After separation of the steam, about 20% of the initial volume remains for disposal as highly concentrated boiler-blowdown (BBD) wastewater, characterized with high pH, elevated temperature, and excessive concentrations of total dissolved solids (TDS) and dissolved organic matter (DOM). 4 BBD wastewaters possess extremely challenging water quality, in part, because of the properties of the geological formation as well as the residual effects of upstream unit processes unique to the SAGD method. It is common for most BBD waters to have near-boiling temperatures caused by residual heat from steam generation.…”

Section: Introductionmentioning

confidence: 99%

Targeted Removal of Dissolved Organic Matter in Boiler-Blowdown Wastewater: Integrated Membrane Filtration for Produced Water Reuse

Hurwitz

Pernitsky

Bhattacharjee

et al. 2015

Ind. Eng. Chem. Res.

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The efficacy of coagulation and membrane filtration was studied for the treatment of boiler-blowdown (BBD) wastewater to enable reuse and minimize the overall water consumption in steam-assisted-gravity-drainage (SAGD), thermally enhanced, oil recovery operations. Direct nanofiltration of chemically unadjusted BBD at its original pH was the optimal treatment option with respect to the flux stability and the removal of dissolved organic material and salinity, which if not removed would result in the fouling and failure of downstream process equipment. The naturally high solute hydrophilicity allowed for prolonged operation with an elevated flux of 60 L m −2 h −1 (LMH) and recovery up to 85% while maintaining solute removal as high as 80% and 45% for dissolved organic carbon and total dissolved solids, respectively. Comparatively, neither precoagulation nor preacidification improved the rejection of dissolved organic material or salinity and consistently resulted in increased membrane surface fouling and flux decline. The proposed filtration treatment solution would result inasmuch as a 4-fold reduction in the volume of makeup water required and BBD wastewater disposed compared to a conventional SAGD facility.

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New technology for heavy oil exploitation wastewater reused as boiler feedwater

Cited by 16 publications

References 3 publications

Improvements of Superheated Steam Stimulation in Secondary Development of Heavy Oil Reservoir

Improvements of Superheated Steam Stimulation in Secondary Development of Heavy Oil Reservoir

Experiments on Steam Injection into Preformed Steam Chambers of Various Shapes for Maximum Condensate Recovery

Targeted Removal of Dissolved Organic Matter in Boiler-Blowdown Wastewater: Integrated Membrane Filtration for Produced Water Reuse

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