Fluid Flow Through The Fracture under Different Stress-state Condition
Download
1 / 25

Fluid Flow Through The Fracture under Different Stress-state Condition - PowerPoint PPT Presentation


  • 148 Views
  • Uploaded on

Fluid Flow Through The Fracture under Different Stress-state Condition. Vivek Muralidharan Dicman Alfred Dr. Erwin Putra Dr. David Schechter. Fracture. A=4.96 Cm 2. 4.98 Cm. Matrix. Accumulator 1. Accumulator 2. HYDRAULIC JACK. PERMEAMETER. BLACK. CORE HOLDER. RED.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Fluid Flow Through The Fracture under Different Stress-state Condition' - kiele


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Slide1 l.jpg

Fluid Flow Through The Fracture under Different Stress-state Condition

Vivek Muralidharan

Dicman Alfred

Dr. Erwin Putra

Dr. David Schechter


Slide2 l.jpg

Fracture Condition

A=4.96 Cm2

4.98 Cm

Matrix

Accumulator 1

Accumulator 2

HYDRAULIC JACK

PERMEAMETER

BLACK

CORE HOLDER

RED

Graduated Cylinder

Graduated Cylinder

PUMP 1

PUMP 1

Schematic of Experiment Apparatus


Slide3 l.jpg

Experimental Results Condition

Overburden experiments for unfractured core

Overburden experiments for fractured core



Slide5 l.jpg

Motivation Condition

  • How do we analyze the experimental results ?

  • What information can be deduced from experimental results?

    • Fracture permeability

    • Fracture Aperture

    • Matrix and fracture flow contributions

    • How these properties change with overburden stress

  • How do we model this experiment ?


Slide6 l.jpg

Experimental Data Analysis Condition

Parallel plate assumption:

w

A

Average Permeability :

l

Combine above equations to determine w:

Contribution flow from matrix and fracture systems:


Slide7 l.jpg

Fracture Permeability Condition

or

 : Hysteresis


Slide8 l.jpg

500 psia Condition

1000 psia

1500 psia

Fracture Aperture

w

w

w


Slide9 l.jpg

Dual Porosity Condition

Dual Permeability

Single Porosity

Matrix Flow Rate


Slide10 l.jpg

Dual Porosity Condition

Dual Permeability

Single Porosity

Fracture Flow Rate

Km = 200 md

Kf = 10,000-50,000 md



Slide12 l.jpg

Simulation Parameters Condition

  • Single phase black oil simulation

  • Laboratory dimensions (4.9875” x 2.51”)

  • 31x1x31 layers

  • Matrix porosity = 0.16764

  • Matrix permeability = 296 md

  • Fracture properties is introduced in 16th layer

  • Fracture porosity = 0.00563972

  • Mean fracture aperture = 56.4 micro meter

  • Fracture aperture is varied using log normal distribution and geostatistical approach

  • Fracture permeability is generated from fracture aperture distribution using modified parallel plate model






Slide17 l.jpg

Lesson Learned ! (Continued)

The fracture aperture (fracture permeability) must be distributed




Slide20 l.jpg

Generated Core Surface from (Continued)

Log Normal Distribution


Slide21 l.jpg

Variogram Modeling to Generate (Continued)

Fracture Aperture Distribution


Slide22 l.jpg

Core Surface Generated after (Continued)

Krigging



Slide24 l.jpg

Conclusions (Continued)

  • Change in overburden pressure significantly affects the reservoir properties.

  • The change in matrix permeability under variable overburden pressures is not significant in contrast with that effect on fracture aperture and fracture permeability.

  • The simulation results suggest that a parallel model is insufficient to predict fluid flow in the fracture system. Consequently, the spatial heterogeneity in the fracture aperture must be included in the modeling of fluid flow through fracture system.


Slide25 l.jpg

Conclusions (Cont’d) (Continued)

  • The results also infer that the effect of stresses may be most pronounced in fractured reservoirs where large pressure changes can cause significant changes in fracture aperture and related changes in fractured permeability.

  • At high overburden pressure the influence of existing fracture permeability on fluid flow contributor in permeable rocks (> 200 md) is not too significant.


ad