Empirical Meets Analytical-Novel Case Study Quantifies Fracture Stress Shadowing and Net Pressure Using Bottom Hole Pressure and Optical Fiber

Haustveit, Kyle; Elliott, Brendan; Roberts, Jon

doi:10.2118/209128-ms

Cited by 11 publications

(6 citation statements)

References 12 publications

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“…The isotropic symmetry model is widely applied to estimate the rock's elastic properties, due to its simplicity. However, many studies performed in shales proved that the assumption of isotropy would result in significant errors in the estimation of rock properties and stress profiles [21][22][23][24][25]. Most rocks exhibit anisotropic behavior to some extent.…”

Section: Stress Estimationmentioning

confidence: 99%

“…The anisotropy can result from the laminated nature of some formations, such as shale or the existence of microcracks [26]. Shales show higher elastic anisotropy values that cannot be accounted for in an isotropic model [21,22,24,25,27,28].…”

Section: Stress Estimationmentioning

confidence: 99%

“…It implies that rock properties are only equal in the same plane but different in the other directions. This implies that two samples in perpendicular and parallel, with respect to the lamination, are required to estimate two Young's moduli, two Poisson's ratios, and one shear modulus to fully characterize its elastic properties [21][22][23]26]:…”

Section: Stress Estimationmentioning

confidence: 99%

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Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

et al. 2023

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Correct estimation of hydraulic fracture height growth is a critical step in the design of Hydraulic Fracturing (HF) treatment, as it maximizes the reservoir stimulation and returns on investment. The height of the fractures is governed by several in situ conditions, especially stress variation with depth. The common workflow to estimate stress is by building the mechanical earth model (MEM) and calibrating it using the Diagnostic Fracture Injection Test (DFIT). However, DFIT interpretation is a complex task, and depending on the method used, different results may be obtained that will consequently affect the predicted hydraulic fracture height. This work used the tangent and compliance methods for DFIT interpretation, along with isotropic and anisotropic stress profiles, to estimate the HF height growth using numerical modeling in a 3D planar HF simulator. Data from two wells in the Anadarko Basin were used in this study. The predicted height was compared with microseismic data. The results showed that even though the tangent method fits better to the isotropic stress profile, HF did not match with the microseismic data. On the contrary, the anisotropic stress profile showed a good match between the compliance DFIT model and the microseismic events. Based on the discussions presented in this study, the validity of the DFIT interpretation is debatable, and when the formations are anisotropic, the isotropic model fails to correctly estimate the minimum stress profile, which is the main input for the estimation of the fracture height. This is in addition to the fact that some researchers have questioned the use of the tangent method in low-permeability formations.

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Section: Stress Estimationmentioning

confidence: 99%

Section: Stress Estimationmentioning

confidence: 99%

Section: Stress Estimationmentioning

confidence: 99%

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Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

et al. 2023

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“…This is a case study, and the study shows that "planar fracture geometries created during the hydraulic stimulation". 13 If we interpret it in terms of the DFN model, the poroelastic response amplitude of the pore should not be a sharp point. Still, it should have a much higher value of the direct pressure response through fracture connection rather than poroelastic response, and the sharp curve shall be much flat rather than in sharp decline.…”

Section: Well Monitoring Data Dts Das Dssmentioning

confidence: 99%

Understanding Unconventional Reservoir Fracturing: A Transdisciplinary Methodological Approach

Z¹

2022

TPE

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A better understanding of hydraulic fracturing behavior is even more crucial in unconventional plays as more new-well or infill-well are drilled and completed nowadays. Having integrated different sources of information/data such as the general trend of hydraulic fracturing practices during the last 20 years, DFIT and fracturing simulation, core analysis data, outcrops, the Hydraulic Fracturing Test Site (HFTS), and fracturing monitoring in the wells or between wells such as pressure, tracers, DAS, DTS, DSS and so on, we proposed an innovated conceptual model of hydraulic fracturing coming along with some associated concepts; The transdisciplinary integration approach we used in this research follows all fundamental physics law and meticulously logical reasoning and analogy with crossing validation, the first principle thinking epistemologically because of the physics of unconventional fracturing is much more complicated than any single discipline can explain. More often than not, the solution coming from any discipline or data source is not a unique one. The cognition of the morphology or the called fracture pattern of hydraulic fracturing is critical, which is virtually the conceptual model of fracturing. The conceptual model can directly impact the fracturing design and the way to evaluate actual fracturing. Using the proposed conceptual model, Fracturing Impact Volume (FIV), one can better explain what fracturing has done for unconventional plays and why it worked. With the proposed conceptual model and tossing aside the fracture network as the fracturing goal, many current fracturing practices can be improved significantly, and the way of production can be revised. This is a significant concept shifting in the unconventional fracturing arena, and it is certainly not an easy task, but this paper makes a compelling case. With the FIV model in mind, the perception of “the greater the pumping rate, the better the fracturing be” becomes unnecessary or makes little sense. This paper will decode the shale oil/gas flow mechanisms and demonstrate a better way to fracture and produce unconventional resources like shale oil/gas.

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“…Mathematical model based on the previous assumptions, the continuity and momentum equations are written as follows Continuity equation: Figure 10 shows the relationship between the magnitude of the pore elastic response and the distance from the fracture surface; the red diamonds represent the measured poroelastic response at the middle points from the fracture surface of those seven stages, and the yellow diamond represents the net pressure from DFIT. This is a case study, and the study shows that "planar fracture geometries created during the hydraulic stimulation" [14]. If we interpret it in terms of the DFN model, the poroelastic response amplitude of the pore should not be a sharp point.…”

mentioning

confidence: 95%

Insights to Unconventional Reservoir Fracturing: A Transdisciplinary Methodological Approach

2022

MCET

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A better understanding of hydraulic fracturing behavior is even more crucial in unconventional plays as more new-well or infill-well are drilled and completed nowadays. Having integrated different sources of information/data such as the general trend of hydraulic fracturing practices during the last 20 years, DFIT and fracturing simulation, core analysis data, outcrops, the Hydraulic Fracturing Test Site (HFTS), and fracturing monitoring in the wells or between wells such as pressure, tracers, DAS, DTS, DSS and so on. After synthesizing all kinds of data and information and applying multidisciplinary fusion ideas to the analysis, we proposed an innovative conceptual model of hydraulic fracturing coming along with some associated concepts; The transdisciplinary integration approach we used in this research follows all fundamental physics law and meticulously logical reasoning and analogy with crossing validation, the first principle thinking epistemologically because of the physics of unconventional fracturing is much more complicated than any single discipline can explain. More often than not, the solution coming from any discipline or data source is not a unique one. The cognition of the morphology or the called fracture pattern of hydraulic fracturing is critical, which is virtually the conceptual model of fracturing. The conceptual model can directly impact the fracturing design and the way to evaluate actual fracturing.Using the proposed conceptual model, Fracturing Impact Volume (FIV), one can better explain what fracturing has done for unconventional plays and why it worked. With the proposed conceptual model and tossing aside the fracture network as the fracturing goal, many current fracturing practices can be improved significantly, and the way of production can be revised. This is a significant concept shifting in the unconventional fracturing arena. It is certainly not an easy task, but this paper makes a compelling case. With the FIV model in mind, the perception of "the greater the pumping rate, the higher net frac pressure, the better the fracturing to be" becomes unnecessary or makes little sense. This paper will decode the shale oil/gas flow mechanisms and demonstrate a better way to fracture and produce unconventional resources like shale oil/gas.

show abstract

Empirical Meets Analytical-Novel Case Study Quantifies Fracture Stress Shadowing and Net Pressure Using Bottom Hole Pressure and Optical Fiber

Cited by 11 publications

References 12 publications

Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

Anisortopic Modeling of Hydraulic Fractures Height Growth in the Anadarko Basin

Understanding Unconventional Reservoir Fracturing: A Transdisciplinary Methodological Approach

Insights to Unconventional Reservoir Fracturing: A Transdisciplinary Methodological Approach

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