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Porothermoelastic response of an oil sand formation subjected to injection and micro-fracturing in horizontal wells

Petroleum Science 2020年第3期17卷 687-700页

作者： Botao Lin Han Meng Jingjun Pan Sen Chen State Key Laboratory of Petroleum Resources and Prospecting&College of Petroleum Engineering China University of PetroleumBeijing 102249China Oil Production Technology Research Institute PetroChina Xinjiang Oilfield CompanyKaramay 834000XinjiangChina

Stimulation of unconsolidated formations via horizontal wells has seen its vast implementation in the recent development of heavy oil reservoir to save the time and cost of preheating the reservoir before the steam-assisted gravity drainage(SAGD)process.A mathematical approach was proposed in this research that fully couples the hydraulic,mechanical and thermal responses of unconsolidated sandstone formations and also applies failure criteria for describing either shear dilation or tensile parting mechanism that generates *** approach was implemented to predict the porothermoelastic response of a pair of SAGD wells subject to injection and subsequent micro-fracturing using hot *** was found that the predicted bottom hole pressures(BHPs)match closely with the field observed *** elliptical dilation zone developed around the dual wells with relatively high pore pressure,porosity,permeability and temperature,implying good interwell hydraulic communication between both *** activation of microcracks dramatically accelerated the dissipation of pore pressure across the entire formation depth and also facilitated heat convection in between the dual wells,though to a lesser *** summary,the approach provides a convenient means to assist field engineers in the optimization of injection efficiency and evaluation of interference among multiple horizontal wells.

关键词： Porothermoelastic response Unconsolidated sandstone Injection micro-fracturing microcracks Oil sand

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Experimental study on the relation between the water content of surface soil and the acoustic wave

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Acta Seismologica Sinica(English Edition) 2001年第5期14卷 571-576页

作者： GUO Zi-qi Institute of Remote Sensing Application Chinese Academy of Sciences Beijing China Institute of Geophysics China Seismological Bureau Beijing China

In order to investigate the relation between the water content changing of surface soil and micro-quake recorded before earthquakes, we carried out a simulation experiment in laboratory. Its purpose is to explore whether the acoustic wave generated by micro-fracturing before earthquake are able to change water content of surface soil, so as to understand the relation between thermal anomaly in the remote sensing image got from the seismogenic area and the coming earthquake. The result of the experiment shows that when the acoustic wave enters into the surface soil the water content here increases on the background of decreasing due to natural evaporation. In the meantime, temperature here decreases.

关键词： acoustic wave remote sensing water content in soil micro-fracturing P315.72 + 3

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