new ongc week-5

8/6/2019 New ONGC Week-5

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Advances in Formation Evaluation Techniques;& Operational Issues in well drilling.

Company: ONGC

Course Description

This course combines open-hole data acquisition and interpretations, cased-hole data

acquisitions and interpretations and directional drilling. This in response to ONGC’s

request for orientation program for acreage and exploration managers.

This course will start with an overview of reservoir fluids and rock properties. This is an

important introduction to the three disciplines.

The various open-hole tools are discussed outlining the physics of measurements, tools’

configurations and borehole and other environmental corrections. The interpretation

equations used for each measurement will also be presented in details. The integration

of the various data into a comprehensive solution will also be outlined. New

technologies, namely nuclear magnetic resonance, will also be presented. A workshop

on open hole interpretations will be made at the end of this session.

Similarly, the cased-hole tool physics and principles of measurements will be presented

in details. Production log interpretations in single phase flow, two-phase flow and three-

phase flow will also be presented in details. This will be done in workshop environment

using log examples. Water saturation behind the casing using pulse neutron logs (PNL)

and Carbon/Oxygen measurements will also be presented. Cased-hole leak detections,

inside the casing and behind the casing will be reviewed in details. This is an important

subject- as statistics shows that over 30% of wells in the Middle East area suffer from

some form of poor well integrity. Finally, new technologies, namely Cased Hole

Formation Resistivities, will be presented.

Directional drilling will also be addressed in some details. The emphasis will be on

measurement while drilling (MWD) and logging while drilling (LWD). These are essential

inputs to real-time well placement. Modern technology tools for Measurements While

Drilling (MWD) and Logging While Drilling (LWD) will be presented. These are essential

technologies for well placements and safe drilling.

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The main objective is to introduce an integrated course in open hole,

cased hole logging and deviated well drilling that will benefit the

acreage and exploration managers who are scheduled to attend. Three

2-hour workshops will be dedicated to each of these topics to expose

the participants to real well data. The course will aim at providing the

following:

• A basic understanding of the fundamentals of reservoirs

and reservoir rocks.

• Exposure to new technologies in Open hole, cased hole and

directional drilling

•

A working knowledge of using interpreting open-hole andcased-hole logs.

Audience

This course is designed specifically to meet the requirements of ONGC acreageand exploration managers. A strong background in cased-hole and open-hole logging and log interpretations is not a prerequisite to attend such a

course. Moreover, a detailed knowledge of MWD and LWD are also notprerequisites.

Topics to be Covered

1- Reservoir Fluids .

2- Rock properties and sedimentary basins

3- Depth control and depth correlation

4- Principles of measurements and the physics of Open-hole logging tools.

5- Log Interpretations: clean and shaly formations- Open-hole workshop.

6- Principles of measurements and the physics of cased-hole tools .




7- Cased-hole log interpretations: Production logging and water saturations

behind the casing - Cased-hole workshop using log data.

8- Directional drilling: MWD and LWD and real time




Course Schedule

Day 1

1- Introduction to Open hole and cased hole1.1- Reservoir Rock properties

1.2- Well Performance

1.3- Reservoir Fluids

1.4- Depth Control and correlation

1.5- Tool Conveyance- Logging while drilling

2- Principles of measurements and the physics of Open hole logging

tools.• Gamma Ray Measurements

• Acoustic

Day 22- Principles of measurements and the physics of Open hole logging

tools- continued

• Density and photoelectric logs

• Neutron logging

• Deep reading resistivity logs

• Shallow reading resistivity logs

• Borehole imaging for geological evaluations

• Nuclear Magnetic Resonance

• Modular Formation Tester

• Logging While Drilling

Day 3

3- Open Hole log interpretations• Basic open hole log interpretations

• Evaluations of shale parameters

• Petrophysics evaluations in shaly formations




Workshop-1: Open hole evaluations using dual water model

4- Principles of measurements and the physics of Cased hole logging

tools

• Production Logging tools including flowmeters, electric sensors,

optical sensors and floScan imager.

• Leak detection tools: Temperature, Noise, Oxygen activation, Phase

Velocity logging

• Pulse Neutron Logging

• Carbon/Oxygen logging

Day 44- Principles of measurements and the physics of Cased hole –cont..

• Cased Hole Formation Resistivity Logging

• Well Testing

• Well Stimulation

Workshop-2: Cased hole evaluations – Production logging and water

saturation evaluations

5- Directional Drilling:

• Measurement while drilling and Real-time well

placement-

Scope family of tools:• Telescope Telemetry: mud pulse on its own right up to

how it can communicate with wired pipe

• Ecoscope: Minitron 'sourceless' neutron logging

• Periscope : Azimuthal resistivity with single boundary

detection for well placement

• Stethoscope: Formation pressure and sampling while

drilling

Day 5• Logging While drilling and application for horizontal well




drilling

• Seismic Vision: Real time borehole seismic while drilling

• Sonic Vision: Real-time compressional measurements convert

to predicted pore pressure allowing the driller to manage mud

weight.

• Pro Vision: Real-time Nuclear Magnetic Resonance while

drilling.

• GVR Geo Vision: High resolution laterolog; Azimuthal GR &

Resistivity; Resistivity images and Bit resistivity


new ongc week-5

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