Determination of the stress profile in a deep borehole in a naturally fractured reservoir |
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| Authors: | Reza Sanaee S. Reza Shadizadeh M. Ali Riahi |
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| Affiliation: | 1. Sciences & Researches Branch of Islamic Azad University, Tehran, Iran;2. Abadan Institute, Petroleum University of Technology, Abadan, Iran;3. Institute of Geophysics, University of Tehran, Tehran, Iran;1. College of Geoscience, China University of Petroleum, Changping, Beijing, 102249, China;2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Changping, Beijing, 102249, China;3. Tarim Oilfield Company, PetroChina, Korla, Xinjiang, 841000, China;1. MOE Key Lab of Petroleum Engineering, China University of Petroleum, Beijing, China;2. Department of Petroleum Engineering, University of Louisiana, Lafayette, LA, USA;3. Jianghan Petroleum Engineering Company, International Cooperation Company, Wuhan, China;1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China;2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, PR China;3. Department of Civil Engineering, Monash University, Victoria 3800, Australia;1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, PR China;2. Department of Exploration, Huabei Oil Field Company of PetroChina, Renqiu 062550, PR China;3. Kuche Project Department of Exploration and Development, Tarim Oil Field, Korla 841000, PR China;1. Department of Petroleum and Chemical Engineering, Sharif University of Technology, Tehran, Iran;2. Department of Petroleum and Chemical Engineering, Sultan Qaboos University, Muscat, Oman |
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| Abstract: | In this paper we attempt to determine the stress profile in a naturally fractured reservoir. Having calculated the vertical stress using the conveniently available density data, in dealing with the minimum horizontal stress component, a contribution of tectonic effect has been added to the conventional approach taking the advantages of step rate injection tests which have been performed in the wellbore. This extra term has been taken into account regarding the layered nature of the reservoir and two different producing formations present in the region. Eventually the maximum horizontal stress component has been determined using the frictional faulting theory concepts, and has been validated by taking drilling induced tensile fractures and wellbore breakouts into consideration. In a few depths where both types of wellbore failures were present, consistent results have been reached. A discussion of the results of the maximum horizontal stress determination is provided. |
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