Electricity generation from enhanced geothermal systems by oilfield produced water circulating through reservoir stimulated by staged fracturing technology for horizontal wells: A case study in Xujiaweizi area in Daqing Oilfield, China

In this paper, the feasibility of generating electricity from EGS (enhanced geothermal systems) by oilfield produced water circulating through reservoir stimulated by staged fracturing technology for horizontal wells is investigated based on the geological data of Xujiaweizi area, located in the Daqing Oilfield, northeast China. HDR (hot dry rock) resource potential assessment is carried out by using volumetric method. Reservoir stimulation is numerically simulated based on the geological data of well YS-1 and field fracturing experience in this region. Geometric dimensions and flow conductivity of the resulting fracture are imported into the hydro-thermal model to calculate the electricity generation potential of the proposed EGS power plant. An EGS design scheme is proposed based on the simulation results. The system is also evaluated from the economic and environmental aspects. The results indicate that HDR resource in Xujiaweizi area is of great potential for development. Through the staged fracturing technology for horizontal wells, electricity generation power of the proposed EGS project can roughly meet the commercial standard. For 20 years of continuous production, power generation from the proposed EGS power plant is economic feasible. Meanwhile, significant reductions in greenhouse gas emissions can be achieved.

[1]  G. Zimmermann,et al.  Hot water generation for oil sands processing from enhanced geothermal systems: Process simulation for different hydraulic fracturing scenarios , 2014 .

[2]  Reinhard Jung,et al.  Hydraulics and well testing of engineered geothermal reservoirs , 1999 .

[3]  Jian Zhao.  Flow-rock heat transfer interaction in rock fractures , 1999 .

[4]  Jian Hu,et al.  Numerical simulation of heat production potential from hot dry rock by water circulating through a novel single vertical fracture at Desert Peak geothermal field , 2013 .

[5]  Zhao Qun.  POTENTIAL ANALYSIS ON EXPLORATION OF GEOTHERMAL RESOURCES IN OIL AND GAS FIELDS , 2008 .

[6]  Wang Gui-ling.  An Estimation of HDR Resources in China's Mainland , 2012 .

[7]  Takahisa Yamamoto,et al.  Design and testing of the Organic Rankine Cycle , 2001 .

[8]  V. Stefánsson.  Investment cost for geothermal power plants , 2002 .

[9]  Michael J. Mayerhofer,et al.  Stimulating Unconventional Reservoirs: Maximizing Network Growth While Optimizing Fracture Conductivity , 2009 .

[10]  Halldór Ármannsson,et al.  Environmental aspects of geothermal energy utilization , 2003 .

[11]  R. Dipippo.  Geothermal power plants : principles, applications, case studies and environmental impact , 2008 .

[12]  Enrico Barbier,et al.  Geothermal energy technology and current status: an overview , 2002 .

[13]  C. Oldenburg,et al.  Numerical simulation of salt precipitation in the fractures of a CO2-enhanced geothermal system , 2012 .

[14]  W. Jiyang.  Estimate of Geothermal Resources Potential for Hot Dry Rock in the Continental Area of China , 2012 .

[15]  Terry Palisch,et al.  Improved Production and Profitability Achieved With Superior Completions in Horizontal Wells: A Bakken/Three Forks Case History , 2010 .

[16]  Brian J. Anderson,et al.  Cost analysis of oil, gas, and geothermal well drilling , 2014 .

[17]  Tsutomu Yamaguchi,et al.  Fluid circulation and heat extraction from engineered geothermal reservoirs , 1999 .

[18]  Feng Luo,et al.  Numerical investigation of fluid flow and heat transfer in a doublet enhanced geothermal system with CO2 as the working fluid (CO2–EGS) , 2014 .

[19]  D. Waples,et al.  A Review and Evaluation of Specific Heat Capacities of Rocks, Minerals, and Subsurface Fluids. Part 2: Fluids and Porous Rocks , 2004 .

[20]  W. Glassley.  Geothermal Energy: Renewable Energy and the Environment , 2010 .

[21]  Yu-Chao Zeng,et al.  Numerical simulation of heat production potential from hot dry rock by water circulating through two horizontal wells at Desert Peak geothermal field , 2013 .

[22]  Ronald DiPippo,et al.  Ideal thermal efficiency for geothermal binary plants , 2007 .

[23]  K. Pruess.  Enhanced geothermal systems (EGS) using CO2 as working fluid - A novelapproach for generating renewable energy with simultaneous sequestration of carbon , 2006 .

[24]  Zhang Er,et al.  Study on the formation and evolution of deep structure of Xujiaweizi fault depression , 2010 .

[25]  Efstathios E. Michaelides,et al.  Geothermal power production from abandoned oil wells , 2009 .

[26]  Stefan Finsterle,et al.  Microhole arrays for improved heat mining from enhanced geothermal systems , 2013 .

[27]  Ruggero Bertani,et al.  Geothermal power generation in the world 2005–2010 update report , 2012 .

[28]  Sadiq J. Zarrouk,et al.  Efficiency of geothermal power plants: A worldwide review , 2014 .

[29]  César R. Chamorro,et al.  World geothermal power production status: Energy, environmental and economic study of high enthalpy technologies , 2012 .

[30]  K. Pruess,et al.  TOUGH2 User's Guide Version 2 , 1999 .

[31]  Susan Petty,et al.  Microseismic monitoring of Newberry volcano EGS demonstration. , 2013 .

[32]  Reinhard Jung,et al.  Geothermal Energy Use in Germany , 2007 .

[33]  Subir K. Sanyal,et al.  COST OF GEOTHERMAL POWER AND FACTORS THAT AFFECT IT , 2004 .

[34]  Roy Baria,et al.  HDR/HWR reservoirs: concepts, understanding and creation , 1999 .