Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in th...
Download
1 / 22

Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in the reservoir manageme - PowerPoint PPT Presentation


  • 149 Views
  • Uploaded on

Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in the reservoir management. Ron Cherry, Maged Fam and Emiliano López. Geological & Reservoir Overview. Formation Evaluation Problems

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 'Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in the reservoir manageme' - dash


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

Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in the reservoir management

Ron Cherry, Maged Fam and Emiliano López


Slide2 l.jpg

Geological & Reservoir evolution as a fundamental evaluation tool in the reservoir management

Overview

Formation Evaluation Problems

High uncertainty in reservoir evaluation using conventional Log Analysis, due to:

  • Multilayer reservoirsmade up of an average of 20 stacked layers, about 5 mt. each.

  • Low formation water salinity

  • Several water/oil and gas/light oil contacts randomly distributed throughout a rock column of 1000 mts. (average 1500 to 2500 mts.)

  • Complex lithology (shaly and tuffaceous sand reservoirs)

  • Different hydrocarbon types


Slide3 l.jpg

Core Porosity vs Permeability evolution as a fundamental evaluation tool in the reservoir management

Permeability (md)

Porosity (%)

Permeability (md)

Porosity (%)

Core measurements on samples from about 60 wells, 800 samples from San Jorge Basin


Slide4 l.jpg

Matrix Density Distribution in so called “Sandstone” from San Jorge Basin

Grain Density Vs Core Porosity

Grain Density (G/c3)

Core Porosity (%)


Slide5 l.jpg

Core Porosity Vs MRI Core Porosity from San Jorge Basin

Core Porosity (%)

MRI Core Porosity (%)

MRI Core Porosity vs. Core Porosity

San Jorge Basin


Slide6 l.jpg

Geometric Mean T2 Cutoff Vs. Depth from San Jorge Basin

Depth (m)

Geometric Mean T2 Cutoff (ms)

Geometric Mean T2 Cutoff vs. Depth

The high degree of variation in the T2 cutoff range may cause some inconsistencies in the final Interpretation.

Thus the SBVI method is a better technique for determining BVI.


Slide7 l.jpg

Spectral Bulk Volume Irreductible from San Jorge Basin

SBVI


Slide8 l.jpg

Core Permeability and MRI Permeability Models Vs Depth from San Jorge Basin

Depth (m)

Core Permeability and MRI Permeability Models (md)

Core Permeability and MRI Permeability Models

Vs Depth

N.B.: MRI Permeability data is based on SVBI model


Slide9 l.jpg

MRI Permeability Models Vs Core Permeability from San Jorge Basin

Core Permeability (md)

MRI Permeability Models (md)

Core Permeability Vs MRI Permeability Models

N.B.: MRI Permeability data is based on SVBI model


Slide10 l.jpg

MRIL Life Cycle from San Jorge Basin

Met reservoir

Objectives

Specify Objectives

Reservoir Properties &

Problems

Borehole

Conditions

Size, mud, temp….etc

Test Results

Yes

MRIL

Pre-job

Planning

Compare

No

Data

Processing

&

Interpretation

Activation

Selection @

Logging speed

Prognosis

Selection of Zones

to Test

STIMRIL

Field Log

QC

Resistivity

log

Core Analysis

if available


Slide11 l.jpg

water from San Jorge Basin

oil

gas

water

oil

gas

oil

water

MRI Forward Model

Tool Physics

Acquisition Parameters

G, TE, TW

MRIL

Forward

Modeling

Planner

Expected Fm. Fluid

Properties

Temp., Pressure &

Viscosity

Mud Properties

Borehole Size


Slide12 l.jpg

Petrophysical Solution!!! from San Jorge Basin

MRI Specific Acquisition and

Interpretation Techniques

“one logging pass”

EDM

Enhanced Diffusion Method (Hydrocarbons 2-50 cp)

TDA

Time Domain Analysis (Hydrocarbons < 2 cp)


Slide13 l.jpg

But….!!! from San Jorge Basin


Slide14 l.jpg

ShortTE from San Jorge Basin

LongTE

MRI Prognosis:

Heavy OIL

1800 L/H

75 % SW

MRI Prognosis:

Water

2400 L/H

100 % SW


Slide15 l.jpg

How can we distinguish from San Jorge Basin

Heavy OIL from Water ???

Special Design for Heavy OIL detection…

MRIL Ultra Long TE Activation


Slide16 l.jpg

ShortTE from San Jorge Basin

LongTE

UltraLongTE

MRI Prognosis:

Heavy OIL

1800 L/H

75 % SW

MRI Prognosis:

Water

2400 L/H

100 % SW


Slide17 l.jpg

ShortTE from San Jorge Basin

LongTE

UltraLongTE

Heavy OIL Detection Example

Initial Test Result (8hs Swabbing): 2400 L/H – 100% SW

Final Test Result (24hs Swabbing): 2400 L/H – 88% SW


Slide18 l.jpg

Halliburton Question regarding details on test results from San Jorge Basin

Dear Customer:

“…If We understand well, the formation was producing water for 8 hours before starting to produce Oil …??

You have insisted to keep it producing because there was a very good signal on the MRI Ultra-Long Te activation,….. Is that correct …??...”

Customer’s response

“It's correct...It has been a very good news today, because up to yesterday, we couldn't believe that from that signal it would be only water... We insisted and it was 2400 l/h x 88% of water (may be the amount of water would have declined if we would wait more time... but for us it was enough seeing some oil)…”


Slide19 l.jpg

Fluid Typing: Light OIL from San Jorge Basin

Shot-Te/Long-Tw

TDA

EDM

Long-Te/Long-TW

Dif. S.-Te/L.TW-S.Tw

MRI Prognosis

Light Oil w/ HGOR

Composite Log MRI Interpretation EDM + TDA

Flow

920 L/H

40 % SW


Slide20 l.jpg

Fluid Typing: GAS from San Jorge Basin

MRI Prognosis

Light OIL

MRI Prognosis

GAS

Flow x 12mm

Wet GAS

P/D 280psi

P/E 1560 psi

MRI Prognosis

GAS


Slide21 l.jpg

Halliburton’s Reservoir Fluids Prognosis Sheet from San Jorge Basin

Based on MRIL Interpretation


Conclusions l.jpg
Conclusions from San Jorge Basin

  • Magnetic Resonance Imaging (MRI) Logs as a fundamental evaluation tool in the reservoir Management

  • Determination of Porosity, Independent to Matrix

  • Determination of Bulk Volume Irreducible Water

  • Reliable Permeability Indicator (absolute after Calibration)

  • Identify Fluid Type (Gas, Oil & Water) by zone

  • Identification of Rock Quality…Permeability, Porosity & Clay

  • Determine variations of Hydrocarbon types (Resistivity independent)…

  • …Heavy, Intermediate, Light Oil or Gas


ad