A New Correlation for Calculating Wellhead Production Considering Influences of Temperature, GOR, and Water-Cut for Artificially Lifted Wells

Ghareeb, Mohamed; Elgaghah, Shedid

doi:10.2523/11101-ms

Cited by 7 publications

(2 citation statements)

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“…A literature search for papers pertaining to multiphase flow through wellhead chokes revealed that multiple researchers have developed empirically and theoretically derived correlations for the prediction of multiphase flow through wellhead chokes. The empirical correlation that appeared to be the most directly applicable was developed by Gilbert (1954) for critical multiphase flow through a wellhead choke, which takes the following form (Poettmann and Beck 1963;Omana et al 1969;Fortunati 1972;Ashford 1974;Ashford and Pierce 1975;Sachdeva et al 1986;Ajienka and Ikoku 1987;Al-Attar and Abdul-Majeed 1988;Surbey et al 1988Surbey et al , 1989Ghassan and Maha 1991;Osman and Dhokla 1992;Perkins 1993;Ajienka et al 1994;Al-Towailib and Al-Marhoun 1994;Elgibaly and Nashawi 1998;Guo et al 2002Guo et al , 2007Burstev et al 2006;Schuller et al 2003Schuller et al , 2006Alsafran and Kelkar 2007;Ghareeb and Shedid 2007;Al-Attar 2008, 2010Nasriani and Kalantariasl 2011):…”

Section: Methodology Comparisonmentioning

confidence: 99%

Proposed Alternative Method for Calculating Emissions From Hydraulic Fracturing Operations

Sexton

Hinman

McKaskle

et al. 2014

SPE Economics &Amp; Management

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The US Environmental Protection Agency (EPA) developed the Mandatory Greenhouse Gas Reporting Rule, published in the Code of Federal Regulations (CFR) at Title 40, Part 98 (40 CFR 98), as a tool to help policy makers assess potential actions to take regarding greenhouse gases (GHGs). Subpart W, "Petroleum and Natural Gas Systems," of 40 CFR 98 prescribes GHG-emissionestimation methodologies and reporting requirements for the oil and gas industry. One area where significant issues remain to be resolved is the estimation of GHG emissions from the act of flowing back gas wells after recent hydraulic fracturing operations.As an alternative to measuring the flowback volume of GHG emissions from a fractured well, EPA presented equations for sonic and subsonic flow, which appear to be derived from the ideal-gas law. Anecdotal evidence from member companies of multiple trade organizations indicated that these equations may overestimate flow rates by as much as 600%.Noble Energy Incorporated (Noble), with the help of Trimeric Corporation (Trimeric), investigated and evaluated empirical methods to estimate GHG emissions from flowback operations that follow hydraulic fracturing. A number of earlier developed correlations for multiphase flow were considered before choosing the Gilbert-type correlation as a potentially applicable equation for this case. The goal of this analysis was to compare the accuracy of the ideal-gas-type equation in a multiphase-flow regime with a Gilbert-type predictive multiphase-flow correlation by use of site-specific and field-regressed coefficients.Measured data for daily and total cumulative gas, water, and oil produced, choke size, and tubing pressure for several wells within a field are needed to develop field-regressed coefficients for the Gilbert-type equation. However, once they have been determined, singular daily average values of choke size, tubing pressure, and rate of produced liquid (oil and water) are all that is required to predict the total volume of produced-gas emissions for other flowback operations in the field.The results of this study indicate that the Gilbert-type correlation with field-regressed coefficients predicts the overall volume of gas produced during a flowback operation more accurately than the single-phase flow EPA Eq. W-11B in 40 CFR 98.

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Section: Methodology Comparisonmentioning

confidence: 99%

Proposed Alternative Method for Calculating Emissions From Hydraulic Fracturing Operations

Sexton

Hinman

McKaskle

et al. 2014

SPE Economics &Amp; Management

View full text Add to dashboard Cite

show abstract

“…According to quality and scope of data upon which they are based, the validity of those correlations is limited. The most popular correlation was developed by Gilbert (1954) but it is valid for critical flow occurring when the upstream pressure of the choke is at least 70 % higher than the downstream pressure or when the ratio of downstream pressure to upstream pressure is equal to 0.588 (Ghareeb and Shedid, 2007). The most popular correlation was developed by Gilbert (1954) but it is valid for critical flow occurring when the upstream pressure of the choke is at least 70 % higher than the downstream pressure (Ghareeb et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

New multiphase choke correlations for a high flow rate Iranian oil field

et al. 2012

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Abstract. The multiphase flow through wellhead restrictions of an offshore oil field in Iran is investigated and two sets of new correlations are presented for high flow rate and water cut conditions. The both correlations are developed by using 748 actual data points, corresponding to critical flow conditions of gas-liquid mixtures through wellhead chokes. The first set of correlations is a modified Gilbert equation and predicts liquid flow rates as a function of flowing wellhead pressure, gas-liquid ratio and surface wellhead choke size. To minimize error in such condition, in the second correlation, free water, sediment and emulsion (BS & W) is also considered as an effective parameter. The predicted oil flow rates by the new sets of correlations are in the excellent agreement with the measured ones. These results are found to be statistically superior to those predicted by other relevant published correlations. The both proposed correlations exhibit more accuracy (only 2.95% and 2.0% average error, respectively) than the existent correlations. These results should encourage the production engineer which works at such condition to utilize the proposed correlations for future practical answers when a lack of available information, time, and calculation capabilities arises.

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Introducing a New Correlation for Multiphase Flow Through Surface Chokes With Newly Incorporated Parameters

Beiranvand

Khorzoughi

2012

SPE Production &Amp; Operations

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Summary Flow-rate prediction of oil production wells is of prime importance to effectively confront high-water-cut and separator problems. (Semi-) empirical multiphase-flow correlations are proved quite useful for this purpose. This work presents new generalized multiphase flow choke correlation, derived on the basis of actual production data from horizontal and vertical wells from an oil field in Iran. The newly established correlation predicts liquid flow rates as a function of flowing wellhead pressure, gas/liquid ratio, surface wellhead choke size, and the newly incorporated parameters: basic sediment and water (BS&W) and temperature. To evaluate the influence of these two new parameters, a parameter-sensitivity analysis was performed and the results are shown. This proposed correlation exhibited an average error of roughly 2.89%, which is superior to those previous correlations in the literature that did not use these two newly incorporated parameters (BS&W and temperature). These new parameters can be added to the previous correlations when the water cut and temperature become important in the production history of the wells.

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A New Correlation for Calculating Wellhead Production Considering Influences of Temperature, GOR, and Water-Cut for Artificially Lifted Wells

Cited by 7 publications

References 0 publications

Proposed Alternative Method for Calculating Emissions From Hydraulic Fracturing Operations

Proposed Alternative Method for Calculating Emissions From Hydraulic Fracturing Operations

New multiphase choke correlations for a high flow rate Iranian oil field

Introducing a New Correlation for Multiphase Flow Through Surface Chokes With Newly Incorporated Parameters

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