A numerical model for wet steam circulating in horizontal wellbores during starting stage of the steam-assisted-gravity-drainage process

Sun, Fengrui; Yao, Yuedong; Li, Guozhen; Liu, Wenyuan

doi:10.1007/s00231-019-02564-7

Cited by 8 publications

(2 citation statements)

References 60 publications

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“…In order to reduce this non-uniformity, the flow control device, outflow control device (OCD), can be installed at the completion interval to inhibit the flow through the high-speed interval and generate additional pressure drop so as to increase the flow rate of the wellbore interval with high flow resistance, eliminate the non-uniform flow caused by the heel effect of the horizontal well and the non-uniformity of permeability, and ensure the uniform spread of the suction profile along the horizontal well (Parappilly, and Zhao, 2009;Gu et al, 2014a;Dong et al, 2014a;Dong et al, 2014b). The combination of a packer and OCD is usually used in production, which can achieve uniform oil drainage in heterogeneous reservoirs and maintain liquid output balance by limiting different oil production indexes in each section so as to delay bottom water coning, prolong anhydrous or bottom water oil production period, and improve oil and gas well production and recovery efficiency (Sun et al, 2018a;Sun et al, 2019). It is an advanced measure to stabilize oil and water and control water.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flow resistance characteristics of the uniform steam injection outflow control device

Du,

Li,

Liu

2023

Front. Chem.

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Introduction: Multi-point steam injection technology is a new completion method for heavy oil horizontal wells to solve the uneven distribution of the intake profile in the horizontal section. It is equipped with the flow control device to achieve the effect of balanced steam injection.Methods: The steady-state experiment method was adopted; Considering the variable mass complex flow of the steam–liquid two-phase flow in the downhole flow device, the pressure loss of downhole tools through uniform steam injection with different steam–liquid compositions was tested, the influencing factors of the pressure drop were analyzed, and a more reliable pressure drop calculation method was established.Results: The overflow pressure drop can be adjusted by changing the aperture, steam dryness, and fluid flow of the downhole outflow control device (OCD).Discussion: By comparing the experimental and theoretical results, the calculation method of the overflow resistance of single-phase and steam–liquid two-phase fluids in OCD is given, and the error is within the usable range.

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Section: Introductionmentioning

confidence: 99%

Experimental study on flow resistance characteristics of the uniform steam injection outflow control device

Du,

Li,

Liu

2023

Front. Chem.

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“…The SAGD process usually employs two parallel horizontal wells. The horizontal injector is closely placed above the producer, which is usually near the base of the reservoir [9][10][11][12]. In traditional SAGD well pair operations, only the heel string is used for injection and production.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Model for Investigating the Steam Conformance along the Dual-String Horizontal Wells in SAGD Operations

et al. 2020

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Non-uniformity of the steam-assisted gravity drainage (SAGD) steam chamber significantly decreases the development of heavy oil reservoirs. In this study, to investigate the steam conformance in SAGD operations, a wellbore model is developed for fluid flow in dual-string horizontal wells. Then, a three-dimensional, three-phase reservoir model is presented. Next, the coupled wellbore and reservoir model is solved with a fully implicit finite difference method. Finally, the effects of the injector wellbore configuration, steam injection ratio and injection time on the steam conformance are investigated. The results indicate that under different injector wellbore configurations, the closer the differences between the pressure drop from the landing position of the short string to the heel of the wellbore and the pressure drop from the landing position of the short string to the toe of the wellbore, the better is the steam conformance. The smaller the difference in the steam injection rate between the long and short injection strings, the higher is the uniformity of the steam chamber. The injector annular pressure profile uniformity is consistent with the steam conformance. Creating a more uniform steam pressure in the annulus of the injector improves the uniformity of the steam chamber. The steam conformance decreases with increasing injection time, so the optimization method of steam chamber uniformity should be adjusted according to different injection times.

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Simultaneously modelling steam flow and heat transfer in vertical and horizontal wellbores during SAGD cyclic pre-heating stage

Wang

Yang

et al. 2021

Heat Mass Transfer

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A numerical model for wet steam circulating in horizontal wellbores during starting stage of the steam-assisted-gravity-drainage process

Cited by 8 publications

References 60 publications

Experimental study on flow resistance characteristics of the uniform steam injection outflow control device

Experimental study on flow resistance characteristics of the uniform steam injection outflow control device

A Numerical Model for Investigating the Steam Conformance along the Dual-String Horizontal Wells in SAGD Operations

Simultaneously modelling steam flow and heat transfer in vertical and horizontal wellbores during SAGD cyclic pre-heating stage

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