SIGLEAvailable from British Library Document Supply Centre- DSC:DX182360 / BLDSC - British Librar... more SIGLEAvailable from British Library Document Supply Centre- DSC:DX182360 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Proceedings of SPE Technical Symposium of Saudi Arabia Section, 2005
Predicting sand production accurately is a difficult task; many techniques have been previously i... more Predicting sand production accurately is a difficult task; many techniques have been previously investigated such as production history, mechanical property analysis using electrical log data, laboratory testing and computer modeling. In this study, the mechanism of sand production problem in an oil reservoir producing medium oil (30° API) from a weak sandstone formation was investigated. An analytical model is elaborated based on linear-poroelastic solution of stress state around circular openings as well as Mohr-Coulomb failure criterion and Darcy's equations for fluid flow through porous media in vertical and horizontal wellbores. In this study, a new important factor necessary for the estimation of the mount of free sand generated between sheared planes caused by the fluid drawdown was introduced. This factor is called sand production capability factor. Sand capability factor was evaluated experimentally for the studied reservoir. Observations of sand production in the studied oil reservoir were utilized to tune and verify the model used in this study. For open-hole completion, it was found that; free sand ready to move into the wellbore is inversely proportional to radial distance. Furthermore, free sand ready for production from the yielded zone around vertical wells is higher than that in the case of horizontal wells. The predicted free sand in all studied cases is in accordance with field observations. Selection of borehole and perforation orientation (in case of perforated casing completion) with respect to the maximum horizontal principal in-situ stress has a great effect in reducing the potential free sand amounts ready to move into the wellbore along with the producing reservoir fluids. Horizontal wellbores oriented at 45° produce minimum sand compared with other horizontal orientations for the studied reservoir. Similar effect is found for perforations phased at zero angular position.
AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is character... more AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is characterized by different products such as oxygenated hydrocarbons like aldehydes, alcohol, ketones, acids and hydro-peroxides with carbon oxides. Light oils were found to ...
Core samples are a vital constituent in petroleum and natural gas engineering research activities... more Core samples are a vital constituent in petroleum and natural gas engineering research activities. Newly developed techniques or theories for solving problems or improving process in petroleum and natural gas engineering with respect to formation rock, must be verified in laboratory using fairly homogenous core samples. Currently, the worldwide practice is to import homogenous sandstone core samples (i.e. Berea sandstone). The cost of importing such core samples is very high and time consuming. The aim of this study is to investigate the possibility of utilizing sandstone formations outcroping in Saudi Arabia as a source for core samples needed for the above mentioned studies. Thus, two sandstone formations named Saq and Sarah outcroping in Al-Qassim area in addition to a sandstone formation named Um Assha'al outcroping in Al-Kharj area were selected for investigation. Properties of the selected sandstones were thoroughly investigated by studying the geology, location accessibil...
AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is character... more AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is characterized by different products such as oxygenated hydrocarbons like aldehydes, alcohol, ketones, acids and hydro-peroxides with carbon oxides. Light oils were found to ...
Copyright 2001, Society of Petroleum Engineers Inc. This paper was prepared for presentation at t... more Copyright 2001, Society of Petroleum Engineers Inc. This paper was prepared for presentation at the 2001 SPE Middle East Oil Show held in Bahrain, 1720 March 2001. This paper was selected for presentation by an SPE Program Committee following review of information contained ...
SIGLEAvailable from British Library Document Supply Centre- DSC:DX182360 / BLDSC - British Librar... more SIGLEAvailable from British Library Document Supply Centre- DSC:DX182360 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Proceedings of SPE Technical Symposium of Saudi Arabia Section, 2005
Predicting sand production accurately is a difficult task; many techniques have been previously i... more Predicting sand production accurately is a difficult task; many techniques have been previously investigated such as production history, mechanical property analysis using electrical log data, laboratory testing and computer modeling. In this study, the mechanism of sand production problem in an oil reservoir producing medium oil (30° API) from a weak sandstone formation was investigated. An analytical model is elaborated based on linear-poroelastic solution of stress state around circular openings as well as Mohr-Coulomb failure criterion and Darcy's equations for fluid flow through porous media in vertical and horizontal wellbores. In this study, a new important factor necessary for the estimation of the mount of free sand generated between sheared planes caused by the fluid drawdown was introduced. This factor is called sand production capability factor. Sand capability factor was evaluated experimentally for the studied reservoir. Observations of sand production in the studied oil reservoir were utilized to tune and verify the model used in this study. For open-hole completion, it was found that; free sand ready to move into the wellbore is inversely proportional to radial distance. Furthermore, free sand ready for production from the yielded zone around vertical wells is higher than that in the case of horizontal wells. The predicted free sand in all studied cases is in accordance with field observations. Selection of borehole and perforation orientation (in case of perforated casing completion) with respect to the maximum horizontal principal in-situ stress has a great effect in reducing the potential free sand amounts ready to move into the wellbore along with the producing reservoir fluids. Horizontal wellbores oriented at 45° produce minimum sand compared with other horizontal orientations for the studied reservoir. Similar effect is found for perforations phased at zero angular position.
AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is character... more AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is characterized by different products such as oxygenated hydrocarbons like aldehydes, alcohol, ketones, acids and hydro-peroxides with carbon oxides. Light oils were found to ...
Core samples are a vital constituent in petroleum and natural gas engineering research activities... more Core samples are a vital constituent in petroleum and natural gas engineering research activities. Newly developed techniques or theories for solving problems or improving process in petroleum and natural gas engineering with respect to formation rock, must be verified in laboratory using fairly homogenous core samples. Currently, the worldwide practice is to import homogenous sandstone core samples (i.e. Berea sandstone). The cost of importing such core samples is very high and time consuming. The aim of this study is to investigate the possibility of utilizing sandstone formations outcroping in Saudi Arabia as a source for core samples needed for the above mentioned studies. Thus, two sandstone formations named Saq and Sarah outcroping in Al-Qassim area in addition to a sandstone formation named Um Assha'al outcroping in Al-Kharj area were selected for investigation. Properties of the selected sandstones were thoroughly investigated by studying the geology, location accessibil...
AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is character... more AI-Awadand El-Sayed temperature. Low temperature oxidation is found below 500° С and is characterized by different products such as oxygenated hydrocarbons like aldehydes, alcohol, ketones, acids and hydro-peroxides with carbon oxides. Light oils were found to ...
Copyright 2001, Society of Petroleum Engineers Inc. This paper was prepared for presentation at t... more Copyright 2001, Society of Petroleum Engineers Inc. This paper was prepared for presentation at the 2001 SPE Middle East Oil Show held in Bahrain, 1720 March 2001. This paper was selected for presentation by an SPE Program Committee following review of information contained ...
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