Petroleum and natural gas industries. Drilling fluid materials. Specifications and tests

Abstract In this experimental work, the absorption and desorption of CO2 (Carbon Dioxide) in oil using a laboratory scale low-pressure experimental apparatus was conducted to study the dissolution behavior of gas in the oil. Estimating the concentration and rate of CO2 transfer from/to a non-aqueous column of static fluid is very important to understand the dissolution of natural gas in an oil-based mud within a well. Studying how natural gas dissolves in an oil-based drilling fluid is of great significance due to risks that a gas kick in an oil-based mud poses to equipment and workers’ health and safety once it is in the riser. By understanding the variables associated with this phenomena, better field practices can be developed and implemented to predict the dynamics of an influx and determine the best course of action when handling the influx. A laboratory scale experimental apparatus was designed and built to inject CO2 at the bottom of a seven-foot static column of VO. The apparatus has five test chambers that can be closed individually to isolate and measure the concentration of dissolved CO2 in oil in each of the sections. As a part of the experiment, the the backpressure applied to the column of oil was varied to observe how pressure affects the mass transfer due to absorption and desorption within the oil column. The amount of gas injected was 1.0 liter per minute of CO2 with a back pressure of the apparatus ranging from 40 to 80 psi. The results of this study will influence further experiments and testing using larger scale equipment involving the dissolution of natural gas within various oil-based drilling fluids at higher pressures. This study also allows for the development of an initial time-dependent mass transfer model which will also be used for predicting dissolution dynamics of Methane in diesel for future large-scale testing.

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A new low-cost drilling fluid for drilling in natural gas hydrate-bearing sediments

Journal of Natural Gas Science and Engineering ◽

10.1016/j.jngse.2016.06.017 ◽

2016 ◽

Vol 33 ◽

pp. 934-941 ◽

Cited By ~ 15

Author(s):

Tianle Liu ◽

Guosheng Jiang ◽

Ping Zhang ◽

Jiaxin Sun ◽

Huicui Sun ◽

...

Keyword(s):

Natural Gas ◽

Gas Hydrate ◽

Drilling Fluid ◽

Low Cost ◽

Natural Gas Hydrate ◽

Hydrate Bearing Sediments

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Environmental-friendly drilling fluid system in offshore natural gas hydrate formations

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/787/1/012106 ◽

2021 ◽

Vol 787 (1) ◽

pp. 012106

Author(s):

Yubin Zhang ◽

Zhengsong Qiu ◽

Xin Zhao ◽

Yongle Ma ◽

Jiaxing Mu ◽

...

Keyword(s):

Natural Gas ◽

Gas Hydrate ◽

Drilling Fluid ◽

Natural Gas Hydrate ◽

Fluid System ◽

Environmental Friendly

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Review of Oilfield Chemicals Used in Oil and Gas Industry

Asian Journal of Physical and Chemical Sciences ◽

10.9734/ajopacs/2021/v9i230132 ◽

2021 ◽

pp. 8-24

Author(s):

M. Chukunedum Onojake ◽

T. Angela Waka

Keyword(s):

Natural Gas ◽

Crude Oil ◽

Oil Recovery ◽

Oil And Gas ◽

Drilling Fluid ◽

Petroleum Industry ◽

Oil And Gas Industry ◽

Oil Field ◽

Wide Range ◽

Oilfield Chemicals

The petroleum industry includes the global processes of exploration, extraction, refining, transportation and marketing of natural gas, crude oil and refined petroleum products. The oil industry demands more sophisticated methods for the exploitation of petroleum. As a result, the use of oil field chemicals is becoming increasingly important and has received much attention in recent years due to the vast role they play in the recovery of hydrocarbons which has enormous commercial benefits. The three main sectors of the petroleum industry are Upstream, Midstream and Downstream. The Upstream deals with exploration and the subsequent production (drilling of exploration wells to recover oil and gas). In the Midstream sector, petroleum produced is transported through pipelines as natural gas, crude oil, and natural gas liquids. Downstream sector is basically involved in the processing of the raw materials obtained from the Upstream sector. The operations comprises of refining of crude oil, processing and purifying of natural gas. Oil field chemicals offers exceptional applications in these sectors with wide range of applications in operations such as improved oil recovery, drilling optimization, corrosion protection, mud loss prevention, drilling fluid stabilization in high pressure and high temperature environment, and many others. Application of a wide range of oilfield chemicals is therefore essential to rectify issues and concerns which may arise from oil and gas operational activities. This review intends to highlight some of the oil field chemicals and their positive applications in the oil and gas Industries.

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