Inflow performance relationship of vertical wells in fractured vuggy media during semi-steady state flow regime

Unified Fracture Design for fracturing optimization is a simple and reliable way to push the limit of the injection ability, reported frequently in recent years. However, most studies focus on fracture design under pseudo-steady state flow regime. The analysis of the different pressure systems between water injection well and oil production well tells us that the steady flow regime in the formation takes up most life span of water injection wells, associated with the field experience. To maximize injection capability for fractured vertical water wells under this regime, a physical optimization method is developed based on the concept of proppant number. Meanwhile, two new type curves without consideration of formation damage are obtained for quantifying the correlation between dimensionless injectivity and dimensionless conductivity. Then, calibrated design procedures accounting for gel damage and non-darcy effect, are also proposed. Finally, sensitivity studies are addressed to clarify the effect of several variables on the optimum fracture geometry.

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STEADY-STATE FLOW DISTRIBUTION ANALYSIS OF NATURAL CIRCULATION IN WATER TUBE BOILER

Computational Thermal Sciences An International Journal ◽

10.1615/computthermalscien.2020033963 ◽

2020 ◽

Vol 12 (3) ◽

pp. 275-288

Author(s):

Atul M. Elgandelwar ◽

R. S. Jha ◽

Mandar M. Lele

Keyword(s):

Steady State ◽

Natural Circulation ◽

Flow Distribution ◽

Distribution Analysis ◽

Steady State Flow ◽

State Flow ◽

Water Tube

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Calibration 7" – Cutthroat Flume as New Size for Discharge Measurement at Free Flow Condition

Engineering and Technology Journal ◽

10.30684/etj.v38i12a.891 ◽

2020 ◽

Vol 38 (12A) ◽

pp. 1783-1789

Author(s):

Jaafar S. Matooq ◽

Muna J. Ibraheem

Keyword(s):

Steady State ◽

Flow Condition ◽

Laboratory Experiments ◽

Free Flow ◽

Experimental Program ◽

Steady State Flow ◽

Empirical Formulas ◽

State Flow ◽

Operation Conditions ◽

Throat Width

This paper aims to conduct a series of laboratory experiments in case of steady-state flow for the new size 7 ̋ throat width (not presented before) of the cutthroat flume. For this size, five different lengths were adopted 0.535, 0.46, 0.40, 0.325 and 0.27m these lengths were adopted based on the limitations of the available flume. The experimental program has been followed to investigate the hydraulic characteristic and introducing the calibrated formula for free flow application within the discharge ranged between 0.006 and 0.025 m3/s. The calibration result showed that, under suitable operation conditions, the suggested empirical formulas can accurately predict the values of discharge within an error ± 3%.

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A Graphical Method for Storage Coefficient Determination from Quasi-Steady State Flow Data

Hydrology Research ◽

10.2166/nh.1996.0008 ◽

1996 ◽

Vol 27 (4) ◽

pp. 247-254 ◽

Cited By ~ 2

Author(s):

Zekâi Şen

Keyword(s):

Steady State ◽

Graphical Method ◽

Pumping Test ◽

Quasi Steady State ◽

Flow Data ◽

Steady State Flow ◽

Storage Coefficient ◽

State Flow ◽

Aquifer Test

A simple, approximate but practical graphical method is proposed for estimating the storage coefficient independently from the transmissivity value, provided that quasi-steady state flow data are available from a pumping test. In the past, quasi-steady state flow distance-drawdown data have been used for the determination of transmissivity only. The method is applicable to confined and leaky aquifers. The application of the method has been performed for various aquifer test data available in the groundwater literature. The results are within the practical limits of approximation compared with the unsteady state flow solutions.

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