Measurement and modeling of methane dissolution in synthetic liquids applied to drilling fluid formulation for deep and ultradeep water wells

Ribeiro, Paulo Leonardo Lima; Filho, Pedro de Alcântara Pessôa; Lomba, R.F.T.; Bonet, E.J.

doi:10.1016/j.petrol.2005.11.007

Cited by 21 publications

(12 citation statements)

References 8 publications

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“…Critical region solubility should be confirmed experimentally. Ribeiro et al did similar work and measured methane solubility in three different synthetic based drilling fluids at temperatures of 70°C and 90°C (Ribeiro, et al, 2006). The experiments with these base oils gave a very good fit to the theoretical element based equation of state (EOS) calculations.…”

Section: Introductionmentioning

confidence: 84%

Experimental Gas Absorption in Petroleum Fluids at HPHT Conditions

et al. 2015

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For efficient and safe well operations it is important to understand the behaviour of gas influx in petroleum fluids and the impact of relevant temperature and pressure changes in the well. Drilling simulators are tools for analysing gas kick detection limits, designing well control procedures, planning the chemicals and equipment needed on the rig, and generally for planning the well design. A major weakness in current models of kick detection is the lack of experimentally verified data in the HPHT region. The data from this study will be analysed and used as an input in a computational model of two phase gas-drilling fluid flow in the well, allowing better prediction of gas absorption.This study will provide experimental measurements under HPHT conditions for oil based drilling fluids (OBDFs) and base oils mixed with methane. As a part of the DrillWell centre program, SINTEF has developed an experimental setup for studying the effects of natural gas dissolved in drilling fluids under conditions relevant for HPHT drilling operations. In this setup we are able to measure density and rheological properties of drilling fluids with different degrees of methane saturation at pressures and temperatures of up to 1000 bar and 200°C.Base oils, the major constituent of OBDFs, contribute to the mud properties. Knowing the properties of the base oils at different pressure and temperature conditions enables assessment of the influence of the other components in the drilling fluid. In this paper we present measurements of a refined mineral base oil, especially designed for deepwater operations, and a linear paraffin oil. These base oils were tested for gas absorption capacity at various pressures and temperatures, and the effect of dissolved gas on the density of the base oils was measured. Experimentally determined saturation pressures show good correlation with predictions made with PVTsim for low gas-oil-ratios (GORs), however, at higher GOR-values the deviation is significant. The temperature influence on the saturation pressure is underestimated by PVTsim, demonstrating the need for more experimental data of drilling fluid behaviour at HPHT conditions. Furthermore, there was a clear difference in the maximum saturation pressure of the two base oils, which may be of high importance for the choice of drilling fluid at high reservoir pressures.In the continuation of this study we will perform measurements of methane solubility in two OBDFs composed of the two base oils studied in this work, respectively. Density and viscosity of mixtures of OBDF/CH 4 will be measured for various amounts of methane at pressures and temperatures ranging from standard ambient to HPHT. The resulting HPHT data will be highly important for improved calculation of bottom hole pressure and prediction of gas kicks.

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Section: Introductionmentioning

confidence: 84%

Experimental Gas Absorption in Petroleum Fluids at HPHT Conditions

et al. 2015

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“…Ribeiro et al [5] extended the synthetic fluids study presenting experimental data for methane-(iso+n) paraffin mixtures and discussing the well control consequences of the gas-synthetic fluids mixtures behavior. The authors also presented a thermodynamic modeling of the gas-liquid mixtures behavior based on Krichevsky-Kasarnovsky (KK) correction of Henry's law.…”

Section: Literature Reviewmentioning

confidence: 99%

Study of the PVT Properties of Gas—Synthetic Drilling Fluid Mixtures Applied to Well Control

Monteiro

Ribeiro

Lomba

2008

SPE Annual Technical Conference and Exhibition

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The study of the interaction between the formation gas and the drilling fluid during offshore operations as well as in HPHT environment is essential to safely and economically drill the pay zone of the well. The environmental regulatory issues and the peculiar technical aspects involved in deep and ultradeep waters require low toxicity synthetic drilling fluids. The main objective of this study was to understand the PVT behavior of those fluids by the experimental determination and modeling of thermodynamic properties such as: solubility, specific gravity and formation volume factor of the fluid. Those properties have a direct impact on kick detection and circulation out of the well and should be addressed in well control planning and execution. The experimental work was conducted in a PVT lab, using mixtures of methane and n paraffin based emulsions as unweighted drilling fluids, tested at the temperatures of 158, 194 and 302 o F. The pressure, temperature and fluid composition effects on those gas-liquid properties were analyzed and the experimental data for solubility and formation volume factor compared to predictions considering the additivity hypothesis and mathematical fittings based on the experimental data. A model for the methane and n paraffin system based on literature data and Peng-Robinson equation of state has also been fitted to the data in order to discuss the application of the additivity hypothesis for the emulsions. Pit gain evaluation based on the correlated experimental data for the synthetic drilling fluid has been performed and compared to the values expected for water based muds.

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“…Darwish reported methane solubility data in heavy n-paraffins at temperatures from 323 to 423 K and pressure up to 10.7 MPa. 9 Silva, Monterio, and Ribeiro conducted methane solubility tests in different esters, and the experimental temperatures are 343.15 and 363.15 K. [10][11][12] Feng compared methane solubility in three base fluids (brine, mineral oil, and poly-alpha-olefin), showed that methane solubility in mineral oil and poly-alpha-olefin are much greater than that in brine. 13 In the area of model development, Thomas applied equation of state (EoS) to predict the bubble point pressure of methane/diesel and methane/ diesel-based mud.…”

Section: Introductionmentioning

confidence: 99%

Investigation of methane/drilling mud phase behavior and its influence to hydrocarbon drilling activity

Feng

Chen

et al. 2019

Energy Science & Engineering

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Knowledge of methane dissolution behavior in drilling mud is of major importance to early kick detection and well control operation in oil and gas drilling industry. In this work, methane solubility experiments in water‐based and oil‐based muds were conducted over wide ranges of temperature and pressure conditions. The influences of mud compositions and methane phases were investigated accordingly. It is found that methane solubility in water‐based mud is minimal and can be ignored. The data in oil‐based mud were analyzed using different equation of state and mixing rules. Our results show that the combination of our novel binary interaction parameter equations, Peng‐Robinson equation, and van der Waals2 mixing rule provides a very good representation of our data as well as those available in the literature. With the proposed model, the annulus methane solubility profile of a deepwater well in South China Sea was predicted, which provides a better understanding of the annulus flow behavior and further improve the safety of drilling operation.

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Measurement and modeling of methane dissolution in synthetic liquids applied to drilling fluid formulation for deep and ultradeep water wells

Cited by 21 publications

References 8 publications

Experimental Gas Absorption in Petroleum Fluids at HPHT Conditions

Experimental Gas Absorption in Petroleum Fluids at HPHT Conditions

Study of the PVT Properties of Gas—Synthetic Drilling Fluid Mixtures Applied to Well Control

Investigation of methane/drilling mud phase behavior and its influence to hydrocarbon drilling activity

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