Reliability of Multiphase Flowmeters and Test Separators at High Water Cut

Ojukwu, Kelechi; Edwards, John E.

doi:10.3997/2214-4609-pdb.148.spe114127

Cited by 2 publications

(1 citation statement)

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“…Highpressure gas is injected at the gas manifold into the annulus, with injection rate being fixed by a variable orifice controller. Gas injection rate is measured using an orifice plate meter (Chia and Hussain 1999;Sutton 2008;Ojukwu and Edwards 2008). Well head flowing pressure is registered using a pressure recorder installed at the wellhead.…”

Section: Data Descriptionmentioning

confidence: 99%

A pragmatic approach for optimizing gas lift operations

Garrouch

Al-Dousari

Al-Sarraf

2019

J Petrol Explor Prod Technol

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The oil flow rate in a single vertical well undergoing gas lift operations is complicated by three factors: (1) The flow is driven by gas injection, in addition to the fluid flow potential gradient applied along the well, (2) the well is interfaced with a porous and permeable reservoir contributing with a fluid feed, and (3) the wellbore geometry may consist of concentric pipes of varying diameters and lengths, rather than a single-diameter pipe. Dimensional analysis is applied to this complex, highly nonlinear production problem, in order to develop empirical models for predicting the optimal gas injection rate and the maximum oil production rate that may be produced from continuous gas lift operations. Two pairs of coupled dimensionless groups are revealed. The first pair consists of a dimensionless pressure drop (π 1) adjusted to the complex wellbore geometry, and a dimensionless ratio of kinetic to viscous forces (π 2) which accounts for the porous medium feed. A constructed database for 388 vertical wells producing by continuous gas lift operations has been used to validate the dimensionless groups. A power-law relation is revealed between the dimensionless groups π 1 and π 2 , allowing to construct an analytical model for predicting the maximum oil production rate that corresponds to the optimal gas injection rate. The second pair consists of two groups denoted χ 1 and χ 2. The group χ 1 is a dimensionless pressure drop with adjustment being augmented to account for the temperature effects on gas flow. Similar to π 2 , the dimensionless group χ 2 is a ratio of kinetic to viscous forces, adjusted to account for the porous medium feed. However, χ 2 is a function of the injection rate, instead of the oil production rate. Likewise, a power-law relation is revealed between χ 1 and χ 2 , allowing to construct an analytical model for predicting the optimal gas injection rate. All power-law relations yield high correlation coefficients when the validation data are segregated according to a discrete productivity index. The analytical models developed by applying dimensional analysis appear to capture the physical controls of gas lift operations. Intuitively, the optimal gas injection rate depends on the pressure gradient along the pipe, the wellbore geometry, the temperature conditions at the bottom of the well and in the stock-tank, the oil density, and on the productivity index. Similarly, the maximum oil production rate, corresponding to the optimal gas injection rate, depends on the pressure gradient along the pipe, the wellbore geometry, the oil density, the productivity index which is implicitly affected by the oil permeability, and viscosity. Unlike multivariate nonlinear regression analysis, the application of dimensional analysis for deriving the analytical models, presented in this study, does not require a presumed functional relationship. In retrospect, dimensional analysis evades the guessing process associated with nonlinear regression analysis.

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Section: Data Descriptionmentioning

confidence: 99%

A pragmatic approach for optimizing gas lift operations

Garrouch

Al-Dousari

Al-Sarraf

2019

J Petrol Explor Prod Technol

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Validation of Coriolis and V-Cone Meters Using Multi Phase Flow Meters (MPFM) in ADCO's North East BAB (NEB) Field - A Case History

et al. 2012

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Oil and Gas industry began to take attentiveness in developing Multi Phase Flow Meters (MPFM) in the early 1980s as the remote data access and improved performance with more compact mobile testing systems were the key features of the required technology. MPFMs were initially used in offshore industry; however, presently their applications are prolonged to land and even subsea installations.For over ten years, Abu Dhabi Company for Onshore Oil Operations (ADCO) has been using MPFM in several oil fields and concession areas. Being relatively the furthermost recent developed field, clustering options, and full application of i-field concept including collaborative environment (CWE); North East Bab (NEB) Asset is crowned for being the frontrunner in adopting the up-to-date technologies among other ADCO Assets.NEB full field development was custom-built in 2005. Fifteen (15) number of conventional three phase test separators were put together for reservoir surveillance and production testing requirement and were lately refurbished and upgraded with Coriolis and V-cone meters rather than originally installed turbine meters. During this period, two portable MFPMs were contracted out in order to achieve the annual testing KPI and prospect was taken to validate the Coriolis and V-cone meters of the refurbished test separators using MPFMs'. This project facilitated instituting better communication protocols along with comprehensive collaborative workflow between NEB Asset and the service provider that resulted in successful completion of the revamping project. This as well had tremendously encouraged ADCO (NEB Asset) to permanently include MPFM flow metering applications in the upcoming future developments. This paper aspires to share the valuable experience gained by utilizing the MPFM in NEB Asset for different flow metering applications, and to establish the technology adoption guidelines for other field operators.

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Reliability of Multiphase Flowmeters and Test Separators at High Water Cut

Cited by 2 publications

References 0 publications

A pragmatic approach for optimizing gas lift operations

A pragmatic approach for optimizing gas lift operations

Validation of Coriolis and V-Cone Meters Using Multi Phase Flow Meters (MPFM) in ADCO's North East BAB (NEB) Field - A Case History

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