Optimization of the horizontal-well multiple hydraulic fracturing operation in a low-permeability carbonate reservoir using fully coupled XFEM model

نویسندگانSeyed Erfan Saberhosseini- Kaveh Ahangari- Hossein Mohammadrezaei
نشریهInternational Journal of Rock Mechanics and Mining Sciences
ارائه به نام دانشگاهDepartment of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
شماره صفحات33-45
شماره سریال114
نوع مقالهFull Paper
تاریخ انتشار2019-02-01
رتبه نشریهISI (WOS)
نوع نشریهچاپی
کشور محل چاپبریتانیا
چکیده مقاله<p dir="ltr" id="sp0090" style="text-align: justify;">Pre-analysis of the geometry and deviation of multiple hydraulically induced fractures is a decisive factor in the successful multiple hydraulic fracturing operations. Besides, fracture spacing should be optimal for obtaining&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/desired-result" title="Learn more about Desired Result">desired results</a>&nbsp;such as maintaining sufficient aperture for&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/proppants" title="Learn more about Proppants">proppant</a>&nbsp;placement, avoiding screen-outs and also preventing&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/fracture-closure" title="Learn more about Fracture Closure">fracture closure</a>&nbsp;or crossing multiple fractures. In fact, the final geometry and deviation of multiple hydraulic fractures are dramatically influenced by the interaction of multiple hydraulic fractures on each other known as stress shadow effect which is caused by fracture spacing and&nbsp;<a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/pore-pressure" title="Learn more about Pore Pressure">pore pressure</a>&nbsp;change. Predicting the geometry and deviation of multiple hydraulic fractures is a challenging part of conducting this technology in Ilam reservoir due to low matrix permeability and naturally fractured nature of the reservoir. Accordingly, a fully coupled stress-diffusion XFEM model for initiation and propagation of multiple hydraulic fractures with five injection zones was prepared to optimize the effect of fracture spacing and pore pressure change on the multiple hydraulic fractures&rsquo; deviation and geometry. Additionally, the XFEM model was verified by three approaches including field data,&nbsp;<a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/stress-intensity-factor" title="Learn more about Stress Intensity Factor">Stress Intensity Factor</a>&nbsp;and KGD zero toughness solution wherein a very good agreement with negligible error was obtained for SIF, field data and KGD M-vertex solution. However, this study has confirmed that both pore pressure and stress shadows contribute to change the&nbsp;<a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/fracture-geometry" title="Learn more about Fracture Geometry">fracture geometry</a>&nbsp;and its deviation significantly in Ilam reservoir. Also, increasing pore pressure between fractures, may affect the fracture geometry to be tighter in width and shorter in length. In addition, considering optimized fracture spacing about 75 m resulted in creation of very smooth, uniform and deeper multiple hydraulic fractures; so, there will be no closed fractures in DPH-02 horizontal wellbore and the possibility of crossing the furthest fracture by the second fracture significantly reduced when the fracture spacing was higher than 5 m.</p> <ul id="issue-navigation"> </ul>

لینک ثابت مقاله

tags: Multiple hydraulic fracture; Fracture spacing; Hydraulic fracture geometry; Hydraulic fracture deviation; Fully coupled XFEM model