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Keywords: heterogeneity
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Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2135
... ABSTRACT: In this paper we describe various approaches used to capture heterogeneity within the reservoir undergoing hydraulic fracturing treatment and their implication on modelling of fracture propagation. In highly laminated reservoirs with soft and/or weak layers, capturing heterogeneity...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2204
... to resolve this using multiple-point statistics that have long been used for generating synthetic images, though mostly applied to sandstone rocks where the heterogeneity is significantly less than that of carbonates. These algorithms work by sequentially populating a grid to emulate the observed image...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0335
... this problem, we designed a transparent true triaxial (TTT) cell that allows us to investigate hydraulic fracture branching under different anisotropic stress conditions with distinct injection parameters and sample heterogeneity. This self-designed TTT cell has a transparent bottom window for us to record...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0376
... ABSTRACT: Mechanical and hydraulic properties of fractures are strongly affected by the exploitation of enhanced geothermal system (EGS) and unconventional reservoirs. This study attempts to reveal the evolution of shearing properties and fluid pressure heterogeneity of natural fractures...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0256
... ABSTRACT: Limited-Entry fracturing underwrites commercial production from multi-layer heterogeneous reservoirs. The uneven contribution of multi-layer can be adjusted by Limited-Entry Fracturing to improve the productivity of poor formations and better control the propagation of fractures...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0214
...-plastic material in heterogeneous chalk reservoirs for compaction analysis which are optimized from history matching the surface subsidence. To this purpose, a 2D simulation case with over-burden, reservoir and under-burden is considered as a conceptual model. A random distribution of porosity field...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0679
... production monitoring reservoir surveillance production control gas injection method enhanced recovery reservoir simulation mesh permeability mesh sensitivity fracture hexahedral mesh sensitivity breakthrough tetrahedral mesh harrington refinement heterogeneity intrinsic permeability mesh...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0685
... between investigation holes it was not possible to conceptualize heterogeneity within single fractures. A new underground dataset has become available from the excavation of four c. 400 m deep vertical access and ventilation shafts, where dense drilling around the circumference of the shafts for several...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0722
... stiffnesses using oriented rock samples collected from outcrops located near the San Emidio geothermal field. In this paper, we seek to understand (1) the static and dynamic elastic properties of the rock formations, (2) the existence or absence of anisotropy or heterogeneity-controlled behavior...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0560
... to softening stage in the process of coal damage. SEM images of coal samples show that micro pores and fractures show large differences in size and shape and distinct heterogeneity in distribution. The experimental results show that the original fractures in coal are the decisive factors of the coal damage...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1245
... physics procedure to estimate porosity and absolute permeability and compare the pore-scale heterogeneities in different core samples. From the analyses that is evident that permeability can vary in even short distances of sampling in an unconventional play, such as the Bakken Fm. Therefore, assuming...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1250
... as the interaction of the blocks with adjacent blocks (contact properties). For rocks with more than one mineral (i.e. block) type, there exists more than one type of contact between blocks, each of which requires a different set of input parameters. Little is known about the effect of heterogeneity of the contact...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1394
... ABSTRACT: Material heterogeneity is commonplace in rock masses, and thus it is vital to investigate its influence on hydraulic fracture propagation in tight reservoir rocks. Here, based on the combined finite-discrete element method, two series of models with uniformly-distributed and Weibull...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1769
... uncertainty cement and bond evaluation heterogeneity prediction synthetic log unconventional resource technology conference ARMA 21 1769 Machine learning framework to generate synthetic cement evaluation logs for wellbore integrity analysis Santos, L. and Dahi Taleghani, A. The Pennsylvania State...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1145
...). Ajibose et al. (2013) have experimentally studied the matter under dynamic loading and showed the forcepenetration responses for conical and spherical inserts under atmospheric pressure. drilling operation cone impact result structural geology heterogeneity impact energy bit selection...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2010
... Abstract This paper aims to discuss recent studies on methods used to capture heterogeneity within a reservoir undergoing hydraulic fracturing treatment and their implication on modelling of fracture propagation. In highly laminated reservoirs with soft and/or weak layers capturing...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2056
... ABSTRACT: The presence of naturally developed collapse breccia pipes poses a risk for subsurface development of natural resources in underground excavations (wellbores, shafts and mines). These features introduce heterogeneities affecting the fluid flow and mechanical behavior...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1415
... fracturing experiments using analog-rock samples that were constructed with controlled heterogeneity for repeatable experiments. Fluids of different viscosities were injected at various volumetric rates to investigate their controls on hydraulic fracture patterns. We observed three distinct phenomena...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1915
.... As a kind of geological material, heterogeneity is one of the basic characteristics of rock. The heterogeneity has a great influence on the mechanical properties of rock and its mechanical behavior under load. In the experimental study of this paper, it is also found that the heterogeneity of rock has...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1147
... in terms of their accuracy and heterogeneity. A soft loading plate was made by 3D-printing in order to avoid the singularity of the stress at the edge of the concentrated load. When the estimation based on a concentrated load test with a single specimen was not satisfactory, the Brazilian test of a sample...

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