A new model for predicting critical gas rate in horizontal and deviated wells

Fadili, Youness El; Shah, Subhash

doi:10.1016/j.petrol.2016.11.038

Cited by 17 publications

(5 citation statements)

References 9 publications

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“…Internationally, deep CBM wells are rare, with only the Piceance Basin in the U.S. conducting deep CBM experiments [22]. In China, complex CBM reservoir conditions and low permeability primarily result in the employment of vertical wells, supplemented by horizontal wells, with various lifting techniques applied [23][24][25].…”

Section: Methodsmentioning

confidence: 99%

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

Zhang,

Jiang,

Zhang

et al. 2024

Processes

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The production of deep-coalbed methane (CBM) wells undergoes four stages sequentially: drainage depressurization, unstable gas production, stable gas production, and gas production decline. Upon entering the stable production stage, the recovery rate of deep CBM wells is constrained by bottom hole flowing pressure (BHFP). Reducing BHFP can further optimize CBM productivity, significantly increasing the production and recovery rate of CBM wells. This paper optimizes the deliquification process for deep CBM in the Linxing Block. By analyzing the production of deep CBM wells, an improved sucker rod pump deliquification process is proposed, and a method considering the flow in the tubing, annulus, and reservoir is established. Using the production data of Well GK-25D in the Linxing CBM field as an example, an optimized design of the improved rod pump deliquification process was undertaken, with design parameters including the depth of the sucker rod pump, the stroke length, and stroke rate. The results show that the improved process significantly lowers the pressure at the coalbed, enhancing CBM well production by 12.24%. The improved sucker rod pump process enriches deliquification technology for deep CBM, offering a new approach for its development and helping to maximize CBM well productivity.

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Section: Methodsmentioning

confidence: 99%

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

Zhang,

Jiang,

Zhang

et al. 2024

Processes

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“…Shi(2016)et al proposed a model of critical gas volume of liquid-carrying in vertical section based on 'half-hamburger' shape droplets by experimentally observing the change of droplets' shape with their size in different inclination angles. 'Fadili(2016) et al considered the elastic collision motion of the droplets in the inclined section, and concluded that the direction of motion of the droplets would change after collision with the wall of the tubing, and calculated the pre-collision velocity based on the collision energy loss, which is the critical gas flow rate for the liquid-carrying capacity. velocity.…”

Section: Current Status Of Research On Droplet Inversion Modellingmentioning

confidence: 99%

Current Status of Research on Gas Well Fluid Accumulation and Throttling Technology and Field Measures

Zhang

2024

AJST

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“…Fadili et al [33] considered the motion of the droplet in the inclined section as an elastic collision. The first stage is the motion of the droplet in the inclined section without energy loss, and the second stage is the collision of the droplet with the oil pipe wall with energy loss, and they considered that after the collision of the droplet with the oil pipe wall, its motion direction is changed, and its required velocity before the collision can be calculated according to its collision energy loss, i.e., the critical carrying liquid-gas flow rate.…”

Section: Figure 3 Force Analysis Of Droplets In Turner's Modelmentioning

confidence: 99%

Advances in Gas Well Fluid Accumulation Modeling

Liu¹

2023

AJST

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Liquid accumulation at the bottom of a well is an important cause of production reduction or even shutdown of natural gas wells, and it is inevitable that water-bearing formations generate liquid accumulation when producing natural gas. Therefore, it is important to study gas well liquid accumulation models and identify liquid accumulation at the bottom of a well in order to take timely and reasonable process measures to deal with liquid accumulation at the well. Based on this, this paper analyzes the current status of domestic and international research on gas well critical fluid-carrying droplet models and critical fluid-carrying film models through literature research, analyzes the problems and development trends of research on gas well fluid accumulation prediction, and provides a comprehensive and systematic summary of the progress of gas well fluid accumulation model research.

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A new model for predicting critical gas rate in horizontal and deviated wells

Cited by 17 publications

References 9 publications

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

Current Status of Research on Gas Well Fluid Accumulation and Throttling Technology and Field Measures

Advances in Gas Well Fluid Accumulation Modeling

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