cbm laboratory services - india cmm/cbm...

Complete Analytical Support For Resource Evaluation of Coal Based Non

Conventional Energy Resources

CBM Laboratory Services

Anwesa Das

Assistant Manager

CBM Lab

Points to deliberate

Introduction

Background of the lab

Laboratory services

Equipments and instrument set up

Research Projects

Accomplishments

CBM Lab Services: An Introduction

Offers comprehensive and detailed analytical

services for characterization of

reservoir and/or basin for CBM/CMM, Shale

Gas etc. and estimating resource.

Carries out mine air analysis for

estimation of toxic gas content which has

bearing on the mine safety.

For meeting the above objectives, the following studies are being carried out:

Field Desorption Study

Gas composition

Adsorbed Phase Gas storage Capacity

TOC (Total Organic Carbon)

Proximate Analysis

Ultimate Analysis

CBM Lab Services: An Introduction

Development of CBM gained ground after

CBM Policy 1997

MoP&NG

assigned the job

of Data dossiers

to CMPDI

Lack of CBM specific data -

major impediment in

Resource assessment and

subsequent commercial

development.

BACKGROUND

Limited lab facility

existing in the

country for CBM

related study.

Visualizing this

problem, CMPDI

initiated action for

establishing CBM lab

to undertake CBM

specific tests.

BACKGROUND

Challenge facedNon-availability of instrument vendors and

service providers

Establishment of state-of-the-art

lab for CBM studies through

PRE funding

Facility created for Desorption

studies and Gas chromatograph

set up

Adsorption Isotherm set up was developed

BACKGROUND

Need feltExtending study

areas and research projects

With development of

shale gas in focus creating

Shale Gas related studies

Under R&D programme, CMPDI brought Shale gas parametric studies

BACKGROUND

R&D Project on studies of

Shale characterization

Consultation with

International Experts

R&D Project on Swelling Shrinkage behavior of coal/shale on sorption

of CH4

Collaboration with reputed technical institutions to facilitate lab and create high end equipments.

BACKGROUND

As of now, CBM Lab , one of its kind in India has equipped itself with upgraded

instruments to provide complete solution for evaluation of CBM and Shale gas

resources in the country.

BACKGROUND

Facilities available for testing:-

Mine air

analysis

CBM

related studies

Shale Gas

related studies

� Petrophysical attributes

� Gas saturation

Quality of coal

Gas content Analysis

CHARACTERISTICS OF

A CBM RESERVOIR

Quality of coal

Proximate Analysis

Ultimate analysis

Organic Petrology

Vitrinite Reflectance

Maceral Analysis

Gas content Analysis

Adsorbed Gas storage capacity

Desorption StudyLost gas(Q1), desorbed gas(Q2) and residual gas(Q3)

Quality of coalQuality of coalQuality of coalQuality of coal

Proximate Analysis

Quality of coal Ultimate analysis

Proximate Analysis

Quality of coal

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coal

Maceral Analysis

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coal

Vitrinite Reflectance

Maceral Analysis

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coal

Vitrinite Reflectance

Maceral Analysis

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coal

Vitrinite Reflectance

Maceral Analysis

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coalQuality of coalQuality of coalQuality of coalQuality of coal

Proximate Analysis

Quality of coal Ultimate analysis

Proximate Analysis

Quality of coal

Organic Petrology

Ultimate analysis

Proximate Analysis

Quality of coal

Vitrinite Reflectance

Organic Petrology

Ultimate analysis

Proximate Analysis

Maceral Analysis

Vitrinite Reflectance

Organic Petrology

Ultimate analysis

Proximate Analysis

Maceral Analysis

Vitrinite Reflectance

Organic Petrology

Ultimate analysis

Proximate Analysis

Maceral Analysis

Vitrinite Reflectance

Organic Petrology

Ultimate Analysis

Proximate Analysis

Langmuir adsorption Isotherm

CHARACTERISTICS OF

A CBM RESERVOIR

� Petrophysical attributes

Porosity

Permeability

� Gas saturation Predicts CDP when CBM gas production will start

CRITICAL COAL BED ANALYSES

� Borehole site Canister desorption

� Gas content analysis

� Desorbed gas composition

� Adsorption isotherm

Primary tool to quantify the volume and quality of gas to determine commercial potential.

Determines the total volume of gas present in a freshly cut reservoir sample(core)

Identifies the fractionation of gas over the life of desorption history to determine a total in situ gas composition and the need for multiple gas isotherm data.

Accurately determines the

volume of gas that can be stored in the pores through sorption at reservoir temperature and pressure.

DESIGN and DEVELOPMENTOF ADSORPTION ISOTHERM SET UP

A Giant Leap

Towards

CBM Producibilty Prediction

Adsorption isotherm study is an important determinant for

CBM production and basin simulation.

Langmuir Adsorption Isotherm Curve

• Global Tendering for three times and the set up could not be

procured

• Build up of AI set up suiting Indian geological conditions

through a CIL(R&D) funded project in association with IIT

Kharagpur

• Designing of the set up took time less than a year

• 70+ samples have been studied of coal/lignite fields

The unique feature of the instrument is that it can work up

to a pressure of 20MPa (Equivalent to a depth of

about 2000mtrs)

DO

WN

LIN

E

HIS

TO

RY

ADSORPTION ISOTHERM SETUP

Heat

Controller

Temperature

Monitor

Gas Inlet

Sample

Cell

Reference

CellValve

Pressure

Transducer

Water

Bath

Gas chromatograph

Determination of composition of desorbed gas by Gas chromatograph :

1.CH4

2.CO2

3.CO4.H2

5.N2 and C5-C10

hydrocarbons

DETERMINATION OF CONSTITUENTS OF

DESORBED GAS/MINE AIR

� The determination of constituents of desorbed gas is carried out by Gas Chromatograph.

Essentials of Shale Gas Play

� Thermal maturity and richness

� Tmax

� Gas in place(adsorbed gas)

� Frac-ability

� Pressure

� Water saturation

� Reservoir continuity

� Clay mineralogy

� Brittleness

Necessary quantified tests of shale samples

� Wellsite Canister Desorption

� TOC,Programmed Pyrolysis and Vitrinite Reflectance

� Gas composition analysis

� Adsorption isotherm Study

� Petrophysical attributes

(Porosity,Permeability)

Aids in quantifying gas in place

Defines organic richness and

thermal maturity

Establishes gas composition and

produced gas characteristics

Determines volume of gas stored

in the pores by sorption at

reservoir pressure and

temperature conditions

Defines storage capacity and

producibility

Shale Gas-Efforts seeded and Facilities developed

� Lab has recently created

facility for taking up Shale

Gas related studies

� A TOC test equipment has

been procured and is

working routinely for

measurement of inorganic carbon and organic carbon.

� TOC is the basic parametric

study to know the gas

potential in source rock in oil

and gas exploration

ROAD AHEAD The lab is fully geared up to take up detailed characterization

study of shale samples for shale gas potentiality

measurement.

� For the purpose, Rock Eval 6 – the most important

instrument for shale characterization is under advanced

stage of procurement.

� Porosimeter cum Permeameter for porosity and permeability measurement is in the process of

procurement.

� One instrument assembly to study shrinkage swelling

behaviour of coal/shale samples for recovery of methane from coal bed is under progress through a CIL (R&D)

funded project.

MINE AIR ANALYSIS

Why is it required

� The firedamp of coal mines is chiefly methane.

Methane is combustible and mixtures of about 5-15% in air

are explosive

� Methane explosion occur when a buildup of the gas comes

into contact with a heat source.

� Hence it is desired to control the concentration of CH4 to

less than 1%.

� Mine air analysis will give the analytical data of

concentration methane which would ensure the safety in

mines.

MIN

E A

IR A

NA

LY

SIS Analysis of mine air samples ( main return,

district return, isolation stoppings etc.) of

the working U/G mines

Mine air Analysis of U/G mines of CIL.

So far, about 4000 + mine air samples have

been analysed by the lab

Preparation of Annual Reports which are

sent to the respective collieries to have the complete backup of the analysed data

R&D/S&T FUNDED PROJECTS

1. An investigation on Adsorption Characteristics Of Indian

Coals and to ascertain recoverability of CBM from deep seated coal resources (Project: Completed)

2. Assessment of prospect of Shale Gas in Gondwana basin

with special reference to CIL command areas; co-implementing agency ARI from USA

3. Studies on Swelling-shrinkage characteristics of some

Indian coals to ascertain recoverability of CBM from deep-seated coal and shale resources

ACCOMPLISHMENTS

CBM lab, one of its own kind does pioneering work in India to carry out tests required for CBM and shale gas evaluation.

The volume of work carried out so far:

� Gas content from desorption experiments. Total no. of boreholes taken up for field desorption test till date :

70+ boreholes studies in Damodar basins

� Total mine air samples analysed till date : About more than 4000.

� R&D and S&T projects: Over INR 20 crores

� Generation of CMM/VAM related data.