Saeid Ahadi; َAndisheh Alimoradi; Hamid Sarkheil; Mahyar Kalhor Mohammadi; Mahdi Fathi
Abstract
Introduction: The process of extraction and exploitation of oil and gas resources requires the cycle of production, sending, and recycling of drilling mud or drilling fluid, so achieving the right combination of drilling mud and its recycling is an essential and fundamental matter in the industrial oil ...
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Introduction: The process of extraction and exploitation of oil and gas resources requires the cycle of production, sending, and recycling of drilling mud or drilling fluid, so achieving the right combination of drilling mud and its recycling is an essential and fundamental matter in the industrial oil and gas and also the environment.Material and methods: Determining the level of contamination of heavy metals and organic matter in the drilling mud and drilling cuttings can be necessary so that intelligent methods to estimate these contaminants can be indirectly effective. This study tried to estimate the contamination rate of drilling cuttings, despite the formation parameters of 10 oil wells drilled at different depths (66 data sets), using the regression learning limit of an artificial neural network.Results and discussion: A total of 60 data sets were prepared to estimate the rate of change in the concentration of heavy metals, polycyclic aromatic hydrocarbons in the learning and testing process, and another six sets of data related to a well that was randomly selected and used in the artificial neural network validation process. Limit learning regression algorithm for ten heavy elements and ten aromatic compounds contaminating cutting and drilling mud on two different data sets in a drilling area in one of the oil fields in southern Iran was evaluated.Conclusion: The results are suitable for estimating the contamination of drilling cuttings and subsequent environmental protection processes. Such processes of contamination and recycling of drilling mud will play an efficient role.
Hamid Sarkheil; Meisam Fathi Nooran; Mojtaba Kalhor; Yousef Azimi; Mohammad Talaeian Araghi
Abstract
Introduction: The process of extracting and exploiting oil and gas resources requires a cycle of production, delivery, and recycling of drilling mud or drilling fluid to achieve the right composition of drilling mud and recycling it as a fundamental issue in the oil industry and also, the environment. ...
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Introduction: The process of extracting and exploiting oil and gas resources requires a cycle of production, delivery, and recycling of drilling mud or drilling fluid to achieve the right composition of drilling mud and recycling it as a fundamental issue in the oil industry and also, the environment. For this purpose, waste management methods are usually used. Material and methods: In this study, an alternative method was chosen instead of the conventional method of stabilization/solidification as a drilling waste management process that is environmentally and economically viable. A total of 80 samples were taken from four types of samples taken from nine levels in an oil well in the south Azadegan field, including mud-cutting mixture, washed cutting, fixed mud-cutting mixture by cement (1:12 portion), and fixed mud-cutting mixture by cement and silica (1:12 and 1:400 portion). Results and discussion: Samples were prepared in different types of washed, with drilling fluid, stabilized, with cement, and stabilized with cement and sodium silicate to assess the concentration of heavy metals and polycyclic aromatic hydrocarbons (PAHs), as well as the salinity. The concentration of heavy metals in the samples showed that no waste management process is required to control or reduce the metals in the samples, but salinity and PAHs require treatment at a depth of 1800 m and more. Conclusion: Summarizing the results of the analyzes showed that the washing process is better from the environmental point of view than the conventional method of stabilization/solidification because the contaminants have been removed from the drill bit, which will be utilized as the final product of this process. However, in the stabilization/solidification method, the pollutants are not purified. Therefore, the washing process was able to remove the contaminant from the excavation wells, so that the washed samples were according to the standard soil of Iran until the end of the standard drilling operation.
