Simulating Cold Heavy Oil Production With Sand by Reservoir-Wormhole Model

Wang, Y.; Chen, C.Z.

doi:10.2118/04-04-03

Cited by 14 publications

(4 citation statements)

References 14 publications

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“…Scholars have conducted extensive research on sand production in gas wells. , It is believed that the gas volume in a gas well is between the critical flow rate of proppant reflux in the fracture and the critical sand carrying flow rate in the wellbore, which not only avoids proppant reflux in the fracture but also reduces the probability of wellbore fluid accumulation and sand blockage in the gas well throttle and reduces the safety risks of gas well production and gathering.…”

Section: Resultsmentioning

confidence: 99%

Cause Analysis and Preventive Measures for Sand Production in Gas Wells of Sulige Gas Field

Wen¹,

Li²,

Huang³

et al. 2023

ACS Omega

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Sand production from gas wells has a significant impact on the production of gas wells. This review aims to reveal the reasons for fracturing sand backflow in Sulige Gas Field gas wells and provide targeted preventive measures to prevent fracturing sand backflow. The critical parameters of sand production in gas wells were calculated through theoretical models, and the reasons and mechanisms of fracturing sand backflow in Sulige gas wells were analyzed from three major aspects: production factors, reservoir factors, and process factors. The Analytic Hierarchy Process was used to analyze the degree of influence of the sand production factors in gas wells. Research has shown that the high production rate of gas wells, unreasonable design of fracturing parameters, and insufficient drainage of fracturing fluid are the main reasons for sand discharge in the Sulige gas well formation. Controlling the production of gas wells between the critical flow rate of fracturing proppant reflux and the critical sand carrying flow rate of the wellbore, designing fracturing construction parameters reasonably, prolonging the gas testing time, and allowing the fracturing fluid to fully reverse flow can effectively prevent sand production from the gas well.

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Section: Resultsmentioning

confidence: 99%

Cause Analysis and Preventive Measures for Sand Production in Gas Wells of Sulige Gas Field

Wen¹,

Li²,

Huang³

et al. 2023

ACS Omega

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“…Random walk algorithm to generate fractal wormholes (Yuen et al [14]), stress analysis and instability model of fluid and granular matrix flow (Geilikman et al [15]; Geilikman and Dusseault [16]; Wang and Chen [20]), and altering the absolute permeability and porosity in the region surrounding the production well (Denbina et al [17]; Sanyal and Al-Sammak [18]; Rivero et al [19]) are among the approaches used to model CHOPS process.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Cold Heavy Oil Production with Sand (CHOPS) using a fluidized sand algorithm

Haddad¹,

Gates²

2015

Fuel

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“…1) Equivalent Permeability Models: In these models, the production of sand was thought to lead to the development of a radial higher permeability (dilated) zone which would start at the vertical well and grow into the formation (2)(3)(4)(5) . 1) Equivalent Permeability Models: In these models, the production of sand was thought to lead to the development of a radial higher permeability (dilated) zone which would start at the vertical well and grow into the formation (2)(3)(4)(5) .…”

Section: Introductionmentioning

confidence: 99%

“…Denbina et al (3) concluded that both a dynamically enhanced absolute permeability of the formation with sand production and a suppressed gas relative permeability were required to history match the oil production from typical cold production wells. Wang and Chen (5) developed a cold production model which also takes into account the sand transport within wormholes. Wang and Chen (5) developed a cold production model which also takes into account the sand transport within wormholes.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Sand Transport Through Wormholes

Tremblay¹

2005

Journal of Canadian Petroleum Technology

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One of the key mechanisms in the cold production (CHOPS) process is the development of high permeability channels (wormholes), which increase the access to the reservoir. In order to model the growth of wormholes in the field, it is necessary to predict the flow of sand along the wormholes. The laminar flow of sand and oil through an open channel within a wormhole was modelled using an analytical Bingham Mohr-Coulomb model. This model was tested by comparing its predictions to oil and sand flow rate measurements obtained in pipe flow experiments reported in the literature. The model for sand transport was used in developing a field wormhole growth model. Introduction In Western Canada, well operators have observed that encouraging sand production along with the oil, in primary recovery, can lead to the economical production of heavy oil from thin reservoirs. Field tests and laboratory experiments suggest that the enhanced recovery associated with massive sand production can best be explained by the development of high permeability channels (wormholes), which access the reservoir(1). The existing cold production models can be essentially divided into three groups.Equivalent Permeability Models: In these models, the production of sand was thought to lead to the development of a radial higher permeability (dilated) zone which would start at the vertical well and grow into the formation(2–5). The earlier models assumed that the permeability of the dilated zone was constant(2). Denbina et al.(3) concluded that both a dynamically enhanced absolute permeability of the formation with sand production and a suppressed gas relative permeability were required to history match the oil production from typical cold production wells. Kumar and Pooladi-Darvish(4) went further in this approach by also history matching the sand production from a typical cold production well. Wang and Chen(5) developed a cold production model which also takes into account the sand transport within wormholes. They history matched the cumulative oil and sand for a typical cold production well.Wormhole Network (Fractal) Models: In this category of models, the enhanced permeability zone caused by sand production is assumed to be caused by a fractal network of wormholes(6–9). The number and density of the wormhole network was assumed to be large enough such that on a larger scale, the region from which sand is produced can be assumed to be uniform. This required that the wormholes be small and that significant branching occur. Reasonable history matches of the oil and sand production rates were obtained for a set of cold production wells(8). Tan et al.(6) also matched the temperature in producing wells during steam injection. The wormhole network was modelled using the Diffusion Limited Aggregation (DLA) fractal geostatistical approach. A semi-analytical cold production model based on a fractal distribution of wormholes was also developed by Liu and Zhao(9).Linear Channel Models: Loughead and Saltuklaroglu(10) interpreted the pressure build-up tests in cold production wells as indicative of linear flow through a high permeability channel.

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Simulating Cold Heavy Oil Production With Sand by Reservoir-Wormhole Model

Abstract: FIGURE 1: Proposed time-dependent relative permeability correlation (the arrow in the curve points to the direct of more released gas).

Cited by 14 publications

References 14 publications

Cause Analysis and Preventive Measures for Sand Production in Gas Wells of Sulige Gas Field

Cause Analysis and Preventive Measures for Sand Production in Gas Wells of Sulige Gas Field

Modelling of Cold Heavy Oil Production with Sand (CHOPS) using a fluidized sand algorithm

Modelling of Sand Transport Through Wormholes

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