Methods and Technology in Geosteering - KOGAkyoilgas.org/Portals/205/Annual Meeting...

Methods and Technology in Geosteering

KO G A 20 1 5 G E O ST EE RING PA NE L L E X INGTO N, K Y K YL E G R AY – G R AY T E CHNICA L, L LC SUSAN BAR BOUR – R UBICON G EOLOGICAL CONSULTING, LLC

Overview • What is Geosteering?

• Methods of Geosteering

• Paper and Digital Logs

• Technical Geosteering

• Innovations and Improvements

• Open Panel Discussion

Geosteering

• The intentional directional control of a well

(Schlumberger Oilfield Dictionary)

Geosteering

• The intentional directional control of a well

• Downhole geological logging measurements

(Schlumberger Oilfield Dictionary)

Geosteering

• The intentional directional control of a well

• Downhole geological logging measurements

• Compares to a local known log

(Schlumberger Oilfield Dictionary)

Geosteering

• The intentional directional control of a well

• Downhole geological logging measurements

• Compares to a local known log

• Keeps wellbore within a pay zone or target, or away from areas desired to avoid

(Schlumberger Oilfield Dictionary)

Correlation via Logs Pros ⁺ Easy and inexpensive

Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources

Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources

Cons ⁻ Difficult to share data and reports

Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources

Cons ⁻ Difficult to share data and reports ⁻ Changes in character between logs can cause issues

?

Correlation via Logs Pros ⁺ Easy and inexpensive ⁺ Requires few resources

Cons ⁻ Difficult to share data and reports ⁻ Changes in character between logs can cause issues ⁻ Requires manual calculation of estimated bedding

dip and geometry

TVD2 = TVD1+(Tan(dlc/2)*((MD2-MD1)/dlc))*(Cos(Inc.xDls)+Cos(Inc*Dls))

D’=Tan-1((TVD2-TVD1)/(MD2-MD1))

Correlation via Computer

Innovations Make Geosteering Fast, Easy, & Affordable

Innovations and Improvements in Geosteering

Quicker and Easier Data Management

Innovations and Improvements Quick Data Entry

Quick setup Copy, Paste, Import .las No manual calculations

Innovations and Improvements Assess Well Plan

Distance to Plan and Target

Innovations and Improvements Paper Logs? No Problem

Digitize …and Go!

Innovations and Improvements in Geosteering

Explore LWD Feeds

Innovations and Improvements Move Around in the Data

Intuitive View Changes:

Use arrows, selection, mouse wheel, keyboard

Scroll Pan

Innovations and Improvements See What You Need to See

Intuitive View Changes:

Use arrows, selection, mouse wheel, keyboard

Zoom in/out all Zoom only one axis

Innovations and Improvements Locate Peaks

Mouse locates position on all screens

Innovations and Improvements Curve Smoothing

Noisy Data is No Problem

Innovations and Improvements in Geosteering

Make Intelligent Steering Decisions

Innovations and Improvements Compare LWD – Digital Sliding

Editing gamma, faulting

Sliding gamma rotates & calculates bedding dip to reflect correlation

Innovations and Improvements Active Dip Models

Data needs adjusted

Innovations and Improvements Compare LWD Quickly

Bridge Correlation Between Known Points

Hide Gamma

Innovations and Improvements Project Ahead of Bit

Calculate Estimated Bedding and Target

Innovations and Improvements in Geosteering

Quicker, Easier, Clearer Communication

Innovations and Improvements Visualize Target and Formations

Button click: Full control of all - Colors - Targets - Plans - Horizons

Innovations and Improvements Plan or TVD View? MD or VS Plotting?

MD or VS axis plotting

Plan view or cross sectional view

Innovations and Improvements Graphics & Reports – Easily Publish

Quick Reporting Customize layout & data

Innovations and Improvements Quick Data Export

Quickly Export Data

Innovations and Improvements in Geosteering

Comparability to Regional Wells

Innovations and Improvements Compare Multiple Models

Innovations and Improvements Compare Multiple Wells

Grid and contour using area wells or adjacent laterals

Update target horizon each survey

Update Surface Stay in Target

Innovations and Improvements Geosteering Increases Production

Map fractures, avoid hazards & undesirable zones

Soft

Keep Drill in Target

Geosteering Panel Discussion

Quicker and Easier Data Management

Explore LWD Feeds

Make Intelligent Steering Decisions

Quicker, Easier, Clearer Communication

Compare to Regional Wells

Increase Production

Geosteering Panel Discussion

E-mail:

rigsteer@rigsteersoftware.com

Website:

http://www.rigsteersoftware.com/

Services

• Mudlogging

• Geosteering (field or remote)

• Gas detection/analysis

• Prospect analysis

• Well planning

brianrothaus@rubicongeological.com

Loggers are all degreed geologists All crews have rig experience Training is core in value