Introduction

  • Davorin Matanović
  • Marin Čikeš
  • Bojan Moslavac
Chapter
Part of the Springer Environmental Science and Engineering book series (SPRINGERENVIRON)

Abstract

The origin, nature and consequences of sand production should be thoroughly examined and evaluated. They have great impact on the nature of the production system if they are produced. Surface gathering system, separating system equipment and some kind of surface safe disposal should be considered too, because of cleaning and disposal expenses.

Also the stability of the formation is changed due the lost of bearing solid material. The problem can be solved using a combination of geomechanical evaluation, optimization of well parameters, oriented and selective perforation, and production optimization by controlling drawdown through the wellbore life cycle.

Keywords

Tangential Stress Bottomhole Pressure Maximum Horizontal Stress Sand Production Sand Control 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Nomenclature

A

Poro-elastic constant (Eq. 1.13), dimensionless

aw

Well azimuth, degrees

Co

Cohesive strength of the rock, Pa

cr

Bulk rock compressibility, Pa−1

cb

Grain compressibility, Pa−1

CBHFP

Critical bottomhole flowing pressure, Pa

CDP

Critical drawdown pressure to cause failure, Pa

E

Young’s modulus, Pa

eo

Original void ratio, dimensionless

H

Thickness of the zone, m

iw

Well inclination, degrees

LF

Loading factor (Eq. 1.19), dimensionless

pe

Reservoir pressure (far field), Pa

pi

Initial pore pressure, Pa

pp

Pore pressure, Pa

ppi

Initial pore pressure, Pa

pw

Wellbore pressure, Pa

pwf

Bottomhole flowing pressure, Pa

r

Near wellbore position, m

rw

Wellbore radius, m

Ti

Initial formation temperature, K

To

Tensile strength of formation rock, Pa

Tw

Wellbore wall temperature, K

TWCsp

Collapse pressure of the standard specimen, Pa

U

Effective strength of the formation, Pa

αp

Biot’s constant, dimensionless

αt

Volumetric-thermal-expansion-constant, K−1

ΔH

Vertical compaction, m

Δe

Change in void ratio, dimensionless

θ

Point location angle, degrees

ϕ

Internal friction angle, degrees

ν

Poisson ration, dimensionless

σ1

Maximum principal stress, Pa

σ2

Medium principal stress, Pa

σ3

Minimum principal stress, Pa

σa

Axial stress at wellbore, Pa

σh

Minimum in-situ horizontal stress, Pa

σH

Maximum in-situ horizontal stress, Pa

σr

Radial stress at wellbore, Pa

σt

Tangential stress at wellbore, Pa

σt1,2

Tangential stresses on the surface of the hole, Pa

σt2

The largest effective tangential stress, Pa

σv

Vertical or overburden stress, Pa

σx

Normal stress in x-direction, Pa

σy

Normal stress in y-direction, Pa

σz

Normal stress in z-direction, Pa

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Davorin Matanović
    • 1
  • Marin Čikeš
    • 1
  • Bojan Moslavac
    • 1
  1. 1.Faculty of Mining, Geology and Petroleum Engineering Petroleum Engineering DepartmentUniversity of ZagrebZagrebCroatia

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