Geometric nature of hydraulic fracture propagation in naturally-fractured reservoirs
42
Citation
35
Reference
10
Related Paper
Citation Trend
Keywords:
Wellbore
Wellbore
Tight gas
Fracturing fluid
Cite
Citations (0)
Wellbore
Cite
Citations (5)
Wellbore
Cite
Citations (1)
Fracturing fluid
Cite
Citations (4)
Wellbore
Cite
Citations (0)
Fracture reorientation affects hydraulic fracturing much in perforated wells. A finite element model used for investigating fracture reorientation is established using the extended finite element method with ABAQUS software. Based on this, both fracture reorientation and fracture propagation during fracturing operation in shale reservoirs are analyzed. Meanwhile, the effect of the difference between the maximum and minimum principal stresses on fracture reorientation during fracturing in shale reservoirs has also been studied. The results demonstrate that the fracture reorients to the direction of the maximum principal stress gradually, and the difference between the maximum and minimum principal stresses impacts the fracture reorientation more than fracture propagation.
Principal stress
Shale Gas
Cite
Citations (31)
Abstract Wellbore cleanouts represent the main application of coiled-tubing (CT) services. Despite a long history of utilizing CT to remove sand and other fill material from oil and gas wells, advancement in the technology, and a growing body of experience, many wells are still not cleaned adequately, some wells cannot be cleaned at all, and a downhole stuck CT or other serious problems are encountered too often. Based on gathered experience and extensive research and development of new tools and techniques, a new, highly engineered and integrated system for wellbore cleanouts was developed. This paper presents the new integrated system approach, which can eliminate wellbore fill-removal problems and provide effective wellbore cleanouts under virtually any wellbore conditions. Case studies are included that show the performance of the new system in difficult field environments.
Wellbore
Coiled tubing
Cite
Citations (19)
This chapter contains sections titled: What is Hydraulic Fracturing? Why Hydraulic Fracturing is Important Fracture Characterization Geomechanics of Hydraulic Fracturing Environmental Aspects of Hydraulic Fracturing Induced Seismicity Case Study: Fracturing Induced Seismicity in California Assessment of Global Oil and Gas Resources Amenable for Extraction via Hydraulic Fracturing Economics of HF Conclusions Acknowledgement
Geomechanics
Tight gas
Fracturing fluid
Cite
Citations (3)
Summary The near-wellbore fracture geometry is important to hydraulic fracture execution and the subsequent post-treatment well performance. A fracture from an arbitrarily oriented well "cuts" the wellbore at an angle and this limits the communication between the wellbore and reservoir. The stress concentration around the wellbore further complicates the near-wellbore fracture geometry. The fracture width at the wellbore can be much smaller than the maximum width, or it may even close when the fracturing pressure decreases below some critical value. The limited communication path may cause a "screenout" during fracture execution or large reduction in the subsequent production because of choked fracture effects. This paper first discusses fracturing conditions for an optimal communication path between the wellbore and the reservoir. The near-wellbore fracture geometry is then determined. The effects of this fracture geometry on fracture execution and production are discussed. Critical fracturing pressures are also calculated for different wellbore orientations and in-situ principal stress magnitudes. Guidelines are provided to enhance the success of fracturing treatments.
Wellbore
Principal stress
Tight gas
Cite
Citations (12)
Abstract The near-wellbore fracture geometry is important to hydraulic fracture execution and the subsequent post- treatment well performance. A fracture from an arbitrarily-oriented well "cuts" the wellbore at an angle and this limits the communication between the wellbore and reservoir. The stress concentration around the wellbore further complicates the near-wellbore fracture geometry. The fracture width at the wellbore can be much smaller than the maximum width, or it may even close when the fracturing pressure decreases below some critical value. The limited communication path may cause a "screenout" during fracture execution or large reduction in the subsequent production because of choked fracture effects. This paper first discusses fracturing conditions for an optimal communication path between the wellbore and the reservoir. The near-wellbore fracture geometry is then determined. The effects of this fracture geometry on fracture execution and production are discussed. Critical fracturing pressures are also calculated for different wellbore orientations and in-situ principal stress magnitudes. Guidelines are provided to enhance the success of fracturing treatments. P. 75
Wellbore
Principal stress
Cite
Citations (7)