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Keywords: natural fracture
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0018
... ABSTRACT: Hydraulic fracturing is one of the most effective conventional reservoir-stimulation techniques currently utilized in the petroleum industry. Hydraulic fracture (HF) – Natural fracture (NF) interactions during the hydrofracturing process are complex in space and time. Although in...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0087
... ABSTRACT: Hydraulic fracturing is the best method to improve production in deep shale, and the complex natural fracture affects the fracture propagation. In this study, numerous true tri-axial experiments were conducted on hydrostone to study the effect of the natural fracture complexity. The...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0225
... hydraulic fracturing Artificial Intelligence complex reservoir nonuniform stress mechanism Upstream Oil & Gas horizontal section hydraulic fracture shale gas natural fracture shale gas well wellbore deformation ground stress shale gas field stress change accumulation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0251
... ABSTRACT: It is important to determine well spacing for maximizing oil recovery in shale reservoirs with complex hydraulic and natural fracture geometries. The optimal number of well placement should be achieved to minimize well interference. Although there are many simulation studies to...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0240
... natural fracture geometry test 1 perforation tunnel 1. INTRODUCTION Hydraulic fracturing has been widely used in the past few decades to stimulate oil production from low permeable reservoirs. Understanding the parameters that affect the geometry and behavior of induced fractures can greatly...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0321
... ABSTRACT: Pre-existing natural fracture networks in unconventional reservoirs present at least two major challenges for refracturing and infill well design. First, spatial characteristics of pre-existing natural fracture networks impact how a hydraulic fracture will propagate. Second, the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0293
...-based gel fracturing fluid. The anthracite specimens with the natural fracture and the hydraulic fracture were prepared and used. A series of seepage experiments were conducted to test the fracture permeability evolution after gel injection and during water flushing. The result shows that the guar gel...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0146
... ABSTRACT: Stimulation of pre-existing natural fractures is considered to contribute significantly to hydrocarbon production from unconventional shale reservoirs. An effective natural-fracture simulation may occur in mixed normal and shear modes due to the misalignment of the natural fractures...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0332
... the hydraulic fracture and natural fractures, we introduce cuttings and core experiment results to study the brittleness and rock fracture energy. Coupling with the reservoir logging fracability data and the natural fracture data, the comprehensive fracability evaluation model is established firstly...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0322
... ABSTRACT: Pre-existing natural fracture networks (NFNs) are ubiquitous in many unconventional oil and gas formations. Hydraulic fracturing (HF) is used to stimulate these formations; many traditional HF analyses and modeling efforts have largely ignored (or highly simplified) the NFN effect...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0362
... ABSTRACT: The geometry of hydraulic fractures is a major concern, especially in highly fractured reservoirs, once it can severely affect oil productivity. Furthermore, interaction of hydraulic fractures with natural fractures can affect locally the in-situ stress state that may cause slippage...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0404
...1. INTRODUCTION Multi-stage fracturing Horizontal wells has been a mature technology in exploiting the shale gas. Even though there are abundant natural fractures and hydraulic fractures in fractured shale, the recovery of shale gas is still low, usually no more than 20%. The study of fluid solid...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0437
... ABSTRACT: Two 0.3 m × 0.3 m × 0.3 m shale blocks, one representing a homogeneous sample while the other representing a naturally fractured sample, are modelled using the lattice based DEM code, XSite. The synthetic rock mass approach (SRM), which assigns the smooth joint contacts (SJM) to the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0455
... key factors controlling unconventional reservoir production remain to be defined quantitatively. u stress ratio, natural fracture reservoir network properties, interconnectivity stimulation mechanisms and fracture propagation are discussed and quantified as the important factors for production...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0401
... ABSTRACT: A large scale of true triaxial simulation test is used to simulate natural fracture reactivation, and Fiber Bragg Grating (FBG) strain sensors are placed in cement specimens of 300 × 300 × 300 mm 3 to monitor the slipping process of natural fractures. The research indicated that...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0431
... the other two principal directions as well, hence all three principal directions. Investigation has been performed of well break out, drilling-induced fractures, and natural fractures from image logs in sites of Ordovician and Cambrian aged tight sands in North Africa which have had a complex tectonic...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0403
... ABSTRACT: With a specific case of Fuling shale gas reservoir, an integrated geomechanics workflow was proposed to investigate stress evolution during production and the complex hydraulic fractures propagation of infill well. In the integrated modelling, a natural fractures network was...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1870
... slip events via analog experiments. The interaction between a natural fracture and a hydraulic fracture has been studied extensively, both experimentally and numerically to better understand the potential for crossing and arrest of a hydraulic fracture intersecting a natural fracture. However, the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1927
... hydraulic fracturing shale gas Upstream Oil & Gas shale reservoir acoustic emission mechanism experiment complex reservoir breakdown pressure propagation stage sensor initiation stage supercritical carbon dioxide algorithm natural fracture fracture application waveform...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2008
... ABSTRACT: The characteristics of a natural fracture system (NFs) play an important role in the hydraulic fracturing treatment. Open fractures form intercommunicated channels of high permeability while sealed fractures act as weakness planes and can be activated during the hydraulic fracture...

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