## Abstract

One of the major problems related to the use of oil base fluids is the dissolution of the natural gas in the fluid. This paper attempts initially at making a bibliographical review of all that was written on the subject of drilling fluids up to now. It also mentions some theoretical aspects regarding the process of gas dissolution in diesel oils, in order to produce an understanding of how the dissolution mechanism is processed. For a same increase in measured volume on the surface, the amount of gas incorporated into the fluid is significantly larger if the gas is dissolved in the oil phase than if it is emulsified in the fluid, as occurs when the fluid is water base. A rig team used to working with water-base fluids may be surprised with the fact that an increase of 20 bbl of fluid on the surface of a 5000 m well can mean the incorporation of about 1800 m{sup 3} of gas, if the fluid is oil-base and all the gas is in solution instead of the incorporation of 900 m{sup 3} if the fluid is water base. This paper has the goal of warning drilling engineers and technicians about
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Lazaro, Welmar;

^{[1] }Boas, Mario Barbosa V^{[2] }- PETROBRAS, Rio de Janeiro (Brazil). Dept. de Perfuracao. Div. de Fluidos de Perfuracao
- PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

## Citation Formats

Lazaro, Welmar, and Boas, Mario Barbosa V.
Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo.
Brazil: N. p.,
1989.
Web.

Lazaro, Welmar, & Boas, Mario Barbosa V.
Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo.
Brazil.

Lazaro, Welmar, and Boas, Mario Barbosa V.
1989.
"Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo."
Brazil.

@misc{etde_700861,

title = {Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo}

author = {Lazaro, Welmar, and Boas, Mario Barbosa V}

abstractNote = {One of the major problems related to the use of oil base fluids is the dissolution of the natural gas in the fluid. This paper attempts initially at making a bibliographical review of all that was written on the subject of drilling fluids up to now. It also mentions some theoretical aspects regarding the process of gas dissolution in diesel oils, in order to produce an understanding of how the dissolution mechanism is processed. For a same increase in measured volume on the surface, the amount of gas incorporated into the fluid is significantly larger if the gas is dissolved in the oil phase than if it is emulsified in the fluid, as occurs when the fluid is water base. A rig team used to working with water-base fluids may be surprised with the fact that an increase of 20 bbl of fluid on the surface of a 5000 m well can mean the incorporation of about 1800 m{sup 3} of gas, if the fluid is oil-base and all the gas is in solution instead of the incorporation of 900 m{sup 3} if the fluid is water base. This paper has the goal of warning drilling engineers and technicians about this problem, as well as presenting charts and equations that allow for a more realistic evaluation of the amount of gas incorporated into oil fluids. (author) 16 refs., 7 figs., 2 tabs.}

place = {Brazil}

year = {1989}

month = {Dec}

}

title = {Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo}

author = {Lazaro, Welmar, and Boas, Mario Barbosa V}

abstractNote = {One of the major problems related to the use of oil base fluids is the dissolution of the natural gas in the fluid. This paper attempts initially at making a bibliographical review of all that was written on the subject of drilling fluids up to now. It also mentions some theoretical aspects regarding the process of gas dissolution in diesel oils, in order to produce an understanding of how the dissolution mechanism is processed. For a same increase in measured volume on the surface, the amount of gas incorporated into the fluid is significantly larger if the gas is dissolved in the oil phase than if it is emulsified in the fluid, as occurs when the fluid is water base. A rig team used to working with water-base fluids may be surprised with the fact that an increase of 20 bbl of fluid on the surface of a 5000 m well can mean the incorporation of about 1800 m{sup 3} of gas, if the fluid is oil-base and all the gas is in solution instead of the incorporation of 900 m{sup 3} if the fluid is water base. This paper has the goal of warning drilling engineers and technicians about this problem, as well as presenting charts and equations that allow for a more realistic evaluation of the amount of gas incorporated into oil fluids. (author) 16 refs., 7 figs., 2 tabs.}

place = {Brazil}

year = {1989}

month = {Dec}

}