Horizontal versus vertical wells interference in hydraulically fractured shale reservoirs

Samuel Igba, Lateef Akanji (Corresponding Author), Toochukwu Onwuliri

Research output: Contribution to journalArticle

8 Downloads (Pure)

Abstract

The impact of well interference on in-situ stresses, drainage area, and pressure response in hydraulically fractured shale reservoirs is examined. In-situ stress distribution in the reservoir resulting from fracture propagation and poro-elasticity and its influence on hydraulic fracture orientation and well spacing configurations are studied using iterative numerical methods. The results of the simulation indicated that drainage distance (XDL) from the well centre is restricted to the immediate environment of the well and with little effect on the external reservoir. In contrast, in-situ stress change has a wider and more complex reservoir reach away from the well with stress orthogonal reorientation occurring from a distance-of-stress-orthogonality (Ⱶσ), while pressure response has the farthest reach (XPT). A new approach utilised in this study, which considers in-situ stress, drainage area and pressure interference (such that XDL< Ⱶσ < XPT), suggests that a spacing range of 450ft to 750ft, with an optimum of 600ft for minimal interference will be adequate. Furthermore, parallel orientation of infill wells within this range is less feasible due to complex stress reorientation over the productive years. Wells drilled and fractured perpendicular to the parent well showed incremental cumulative production.
Original languageEnglish
Pages (from-to)56-68
Number of pages13
JournalJournal of Oil, Gas and Petrochemical Sciences
Volume2
Issue number2
DOIs
Publication statusPublished - 5 Mar 2019

Fingerprint

shale
in situ stress
well
drainage
fracture orientation
fracture propagation
stress change
infill
numerical method
elasticity
spacing
simulation

Keywords

  • well spacing
  • shale reservoir
  • interference
  • hydraulic fracturing

Cite this

Horizontal versus vertical wells interference in hydraulically fractured shale reservoirs. / Igba, Samuel; Akanji, Lateef (Corresponding Author); Onwuliri, Toochukwu.

In: Journal of Oil, Gas and Petrochemical Sciences, Vol. 2, No. 2, 05.03.2019, p. 56-68.

Research output: Contribution to journalArticle

@article{cc14facc5fff4dbc8ea9b1c839d91a4d,
title = "Horizontal versus vertical wells interference in hydraulically fractured shale reservoirs",
abstract = "The impact of well interference on in-situ stresses, drainage area, and pressure response in hydraulically fractured shale reservoirs is examined. In-situ stress distribution in the reservoir resulting from fracture propagation and poro-elasticity and its influence on hydraulic fracture orientation and well spacing configurations are studied using iterative numerical methods. The results of the simulation indicated that drainage distance (XDL) from the well centre is restricted to the immediate environment of the well and with little effect on the external reservoir. In contrast, in-situ stress change has a wider and more complex reservoir reach away from the well with stress orthogonal reorientation occurring from a distance-of-stress-orthogonality (Ⱶσ), while pressure response has the farthest reach (XPT). A new approach utilised in this study, which considers in-situ stress, drainage area and pressure interference (such that XDL< Ⱶσ < XPT), suggests that a spacing range of 450ft to 750ft, with an optimum of 600ft for minimal interference will be adequate. Furthermore, parallel orientation of infill wells within this range is less feasible due to complex stress reorientation over the productive years. Wells drilled and fractured perpendicular to the parent well showed incremental cumulative production.",
keywords = "well spacing, shale reservoir, interference, hydraulic fracturing",
author = "Samuel Igba and Lateef Akanji and Toochukwu Onwuliri",
note = "The authors acknowledgethe Petroleum Technology Development Fund (PTDF) Nigeria for sponsoring this project. Special thanks to Christie Judith, and members of Computer Modelling Group (CMG) for technical support on the use of CMG-GEM software for this study.",
year = "2019",
month = "3",
day = "5",
doi = "10.30881/jogps.00025",
language = "English",
volume = "2",
pages = "56--68",
journal = "Journal of Oil, Gas and Petrochemical Sciences",
number = "2",

}

TY - JOUR

T1 - Horizontal versus vertical wells interference in hydraulically fractured shale reservoirs

AU - Igba, Samuel

AU - Akanji, Lateef

AU - Onwuliri, Toochukwu

N1 - The authors acknowledgethe Petroleum Technology Development Fund (PTDF) Nigeria for sponsoring this project. Special thanks to Christie Judith, and members of Computer Modelling Group (CMG) for technical support on the use of CMG-GEM software for this study.

PY - 2019/3/5

Y1 - 2019/3/5

N2 - The impact of well interference on in-situ stresses, drainage area, and pressure response in hydraulically fractured shale reservoirs is examined. In-situ stress distribution in the reservoir resulting from fracture propagation and poro-elasticity and its influence on hydraulic fracture orientation and well spacing configurations are studied using iterative numerical methods. The results of the simulation indicated that drainage distance (XDL) from the well centre is restricted to the immediate environment of the well and with little effect on the external reservoir. In contrast, in-situ stress change has a wider and more complex reservoir reach away from the well with stress orthogonal reorientation occurring from a distance-of-stress-orthogonality (Ⱶσ), while pressure response has the farthest reach (XPT). A new approach utilised in this study, which considers in-situ stress, drainage area and pressure interference (such that XDL< Ⱶσ < XPT), suggests that a spacing range of 450ft to 750ft, with an optimum of 600ft for minimal interference will be adequate. Furthermore, parallel orientation of infill wells within this range is less feasible due to complex stress reorientation over the productive years. Wells drilled and fractured perpendicular to the parent well showed incremental cumulative production.

AB - The impact of well interference on in-situ stresses, drainage area, and pressure response in hydraulically fractured shale reservoirs is examined. In-situ stress distribution in the reservoir resulting from fracture propagation and poro-elasticity and its influence on hydraulic fracture orientation and well spacing configurations are studied using iterative numerical methods. The results of the simulation indicated that drainage distance (XDL) from the well centre is restricted to the immediate environment of the well and with little effect on the external reservoir. In contrast, in-situ stress change has a wider and more complex reservoir reach away from the well with stress orthogonal reorientation occurring from a distance-of-stress-orthogonality (Ⱶσ), while pressure response has the farthest reach (XPT). A new approach utilised in this study, which considers in-situ stress, drainage area and pressure interference (such that XDL< Ⱶσ < XPT), suggests that a spacing range of 450ft to 750ft, with an optimum of 600ft for minimal interference will be adequate. Furthermore, parallel orientation of infill wells within this range is less feasible due to complex stress reorientation over the productive years. Wells drilled and fractured perpendicular to the parent well showed incremental cumulative production.

KW - well spacing

KW - shale reservoir

KW - interference

KW - hydraulic fracturing

U2 - 10.30881/jogps.00025

DO - 10.30881/jogps.00025

M3 - Article

VL - 2

SP - 56

EP - 68

JO - Journal of Oil, Gas and Petrochemical Sciences

JF - Journal of Oil, Gas and Petrochemical Sciences

IS - 2

ER -