LABORATORY ACTIVITIES:

Chemical laboratory was established in 1952 with make-shift laboratory for testing Drilling fluids. Thereafter, laboratory was expanded to carry out experiments in areas of design and formulation of various kinds of Drilling fluids, Crude oil testing related to production and cross-country pipeline transportation, analysis of produced & marketed natural gas, analytical activities, water analysis for pollution monitoring, cement quality testing and cement slurry formulation for oil well cementation jobs, Bottom-Hole data acquisition of reservoir pressure temperature data, phase behavior studies of reservoir fluid samples and petro-physical study of side-wall & conventional cores.

Chemical Laboratory obtained ISO 9001:2000 certificates for its Quality Management in Nov 2005 and the ISO 9001:2000 was upgraded to the then latest version ISO 9001:2008 in Nov 2010 which is valid till date. However, ISO 9001:2008 will be no longer valid after September’2018 and up gradation of the same to its latest version ISO 9001:2015 is in progress.

ANALYTICAL AND ENVIRONMENT LABORATORY

The Analytical and Environmental Laboratory is an integral part of the Chemical Laboratory and plays a vital role in achieving company’s objectives by carrying out activities related to drilling, production, environmental pollution etc. in addition to monitoring of water quality used for human consumption and industrial use.

ACTIVITIES undertaken by A&E Lab: Tube well water monitoring for checking any probable contamination in the ground water. Quarterly monitoring of the river water upstream & downstream of the industrial water discharge points. Effluent pit water from the drilling site and different oil installations. Pond water or irrigation water sample for sorting of people’s complain about contamination of the same. Quality of water injected in the designated Water Injection wells. Quality of water disposed in Water Disposal wells. Boiler / cooling water from various plants. Drinking water from various sources & installations for adherence to BIS specification.

INFRASTRUCTURE

1. Dissolved Oxygen Meter (Orion 4Star) 2. Oil Content Analyzer (Horiba OCMA - 350E) 3. BOD Analyzer (Lovibond - Oxydirect) 4. BOD Incubator (ShellLab) 5. Spectro-photometer (UV-1) 6. pH Meter (Metrohm) 7. Electronic Balance (Mettler Toledo - XP504) 8. Conductivity Meter (HACH -Sension7) 9. Turbidity meter (HACH) 10. Water Quality Multi Checker (HACH) 11. Ion Chromatograph (Metrohm) Ion Chromatograph 12. Lab Water Purifier (Cascada) 13. Elga Lab Water Purification System (Elga)

DRILLING FLUID & OIL FIELD CHEMICAL(OFC) LABORATORY

Our Drilling Fluid Laboratory is fully equipped for designing and formulating various types of drilling, completion and workover fluids and also drilling fluid analysis for quality maintenance and monitoring. The various parameters tested for this purpose includes:

Density / Mud weight Marsh Funnel Viscosity Viscosity & Gel Strength, Low Shear Rate Viscosity API Fluid Loss HP-HT Fluid Loss API Sand content , Oil & solid content Low & High Gravity Solid PH, Alkalinity, Salinity Lubricity Co-efficient Extreme Pressure Lubricity test Potassium Ion determination PHPA Determination Glycol Content Differential sticking co-efficient Shale Density / Shale Factor Methylene blue capacity

Our laboratories are fully equipped to test various oil field chemicals and cement additives used in drilling and cementation of Oil and Gas wells for their quality assurance and performance evaluation. Oil field chemicals are those chemicals which are procured by Oil India Limited for formulation and maintenance of drilling fluids & workover / completion fluids which are used during drilling & work over operations of oil & gas wells. “Oil Field Chemical Testing” includes the testing of all such chemicals for their requisite physical & chemical properties, performance evaluation against the main purpose for procurement, active matter & impurities content etc. Area of operation:

A. Testing of Drilling and Workover fluids used at well sites B. Performance evaluation of Drilling and Workover fluid additives. C. Design and formulation of various Drilling and Workover fluids

HPHT Rheometer Lab Shear Mixer Recent developments:

i. Development of indigenous vendors for supply of Drilling and Work-over fluid chemicals under make in India campaign.

ii. Provisions for MSME & NSIC registered vendors.

CEMENT LABORATORY

Cement laboratory primarily deals with testing of oil well cement (OWC), various cement additives, formulation and design of cement slurries for all kinds of Oil and Gas wells for casing and liner cementation with state of the art testing equipment and additives.

The laboratory formulates and design cement slurries for: I. Primary cement job viz. conductor, isolation, production and liner casing jobs

II. Squeeze, isolation repair and plug jobs III. HPHT well cementation using silica flour IV. Micro-matrix cement slurry design for squeeze cement jobs in low permeability reservoir

The cement laboratory is equipped with

• Atmospheric Consistometer • API HPHT Fluid Loss Tester • Stirred Fluid Loss tester • HPHT Consistometer (Model -8-25, 7222) • Ultrasonic Cement Analyser • HPHT Curing Chamber • Compressive Strength Testing Machine. • Gas Migration analyser

HPHT Consistometer Ultrasonic Cement Analyser GAS LABORATORY

Natural Gas Analysis Laboratory is engaged for compositional analysis of natural gas produced from reservoir in the form of associated and non-associated gas. Gas analysis is also done to determine its calorific value for pricing of gas to sell to various customers.

• The laboratory has also capability to carry out compositional analysis of liquid hydrocarbons such as naphtha, motor spirit, condensate, crude oil etc. through gas chromatographic technique.

• Dew point measurement of Natural gas flowing through pipelines is carried out for knowing the moisture content and subsequent remedial measures for effective gas dehydration to avoid hydrate formation.

At present the Gas Laboratory is equipped with Gas Chromatograph (Clarus 500 NGA) Dew Point Meter Clarus 500 GC SIMDIST Total Sulphur Analyser

Gas Chromatograph (Clarus 500 NGA). Total Sulphur Analyser

Dew Point Meter

OIL ROUTINE & OIL SPECIAL LABORATORY

Crude oil analysis laboratory is an integral part of the Chemical Laboratory and is functionally separated into two sections: i. Routine Crude Oil analysis laboratory ii. Special Crude Oil analysis laboratory

Routine Crude Oil analysis laboratory: Analysis of crude oil samples collected from

Producing stream of oil wells, Oil Collecting Stations, Newly commissioning wells and work over wells Other miscellaneous sources. Analysis of TMB samples from various crude oil storage tanks of Central Tank Farm (CTF) for acceptability and

custody transfer for transportation through the M/L & B/L to various refineries Auto samples during pumping and transportation from tanks of CTF.

Special Crude Oil analysis laboratory:

Detail analysis of newly discovered crude oil samples from various reservoir / formation Analysis of condensate from various sources Analysis of HSD sample Analysis of Motor Spirit. Analysis of TEG sample Analysis of Lube oil Determination of Vapor pressure of Crude oil & condensate etc.

Infrastructure

1) Automatic Density Meter 2) Automatic Cloud-Pour Point Analyser 3) Automatic Distillation Unit 4) Automatic Flash Point Tester (FLPL) 5) Automatic Flash Point Tester (FLPH) 6) Kinematic Viscosity Analyzer (HVM 472) 7) ERAVAP- Vapour Pressure Tester (New addition) 8) Stabinger Viscometer (New addition) 9) Mini Vap Vision (New addition)

Automatic Cloud-Pour Point Analyser Mini Vap Vision ERAVAP- V P Tester

BOTTOM HOLE DATA ACQUISITION LABORATORY

• This Laboratory is responsible for acquisition of reservoir data through sub-surface pressure-temperature surveys by using mechanical and state of the art electronic memory pressure gauges.

• Engaged in sampling of Sub-surface as well as Surface Reservoir Fluid • Bottom Hole Pressure (BHP) and temperature data are utilized for reservoir management which involves

surveillance of reservoir pressure, pressure depletion trends of producing wells etc. In well testing operation BHP data are recoded against time as per the test design keeping the pressure gauge down hole for a longer duration. These BHP data as a function of time (Well Test Analysis) help Reservoir Engineer to estimate important reservoir parameters viz. Initial Reservoir Pressure, Minimum Reservoir Volume, Permeability, Skin and also to identify heterogeneity and boundary of the reservoir under study.

BHP operation at field Electronic Bottom Hole Pressure recording Gauges

PT vs time Graph

PVT LABORATORY

Oil-Gas reservoirs are produced by pressure depletion process. The reservoir pressure declines as fluids are recovered however reservoir temperature remains constant throughout the process. The main variable that determines the behaviour of fluid under reservoir condition is Reservoir Pressure. Basically, PVT analysis involves injection of a representative reservoir fluid into PVT cell followed by reduction of cell pressure (expansion of cell volume) in predefined steps from elevated pressure (well above reservoir pressure) to the limit that corresponds to maximum allowable volume of the cell. The volume of cell (occupied either by oil or gas or both) is measured for each reduced pressure step at reservoir temperature. For cell volume at each pressure steps the corresponding volume of fluid occupied at standard pressure and temperature are also recorded.

• PVT tests are mostly physical simulation of reservoir depletion process in laboratory. As a first step it helps us to gather knowledge on change in phase behaviour of reservoir fluid with pressure depletion.

• The tests simulate the surface recovery of Hydrocarbon at different steps of pressure reduction in the reservoir • Volumetric relation between fluid at reservoir condition and that at the surface condition is determined • Molar composition of Reservoir Fluid as well as that of produced fluids at different step of pressure decline are

determined

The laboratory conducts detailed experiments on Reservoir Fluid for:

• Phase Behaviour Studies Of Oil-Gas System • Molar Composition Analysis • Phase Behaviour Studies Of Gas-Condensate System • Optimization of Separator conditions to improve liquid recovery

PVT analysis of Reservoir Fluid is required for:

• Knowledge of phase behavior of the test fluid • Accurate estimation of H-C reserve in place • Optimum designing of Surface facilities • Optimum Reservoir depletion strategy • Creation of PVT model for Reservoir Simulation

Infrastructure The facilities available in the laboratory

• Hg free PVT set up complete with all the required components • GCs for Gas & liquid analysis • Simulated distillation (SIMDIS) GC • Flash Separator, Main PVT cell, Density Meter, Capillary Viscometer

Customers

• We supply PVT& BHP data to G&R & Production Deptt. (Internal customer) • We render testing service to external customers on chargeable basis.

Liquid Analyser & Simdistillation Equipment Natural Gas Analyser

Fluid Eval (Mercury Free) PVT Equipment

Petro-physical Laboratory

• Engaged in study of reservoir rock properties and their interactions with fluids (gases, liquid hydrocarbons and aqueous solution)

• The lab determines specific rock properties viz. porosity ,permeability, hydrocarbon saturation, capillary pressure, pore size distribution etc. which are important petrophysical properties in the planning and design of reservoir development

The lab is equipped with state of the art instruments to provide following testing services:

• Side Wall Core Analysis • Conventional Core Analysis • Sieve analysis of subsurface sand

Why SWC analysis?

• To pin point perforation zone. • To correlate with logging data. • To ensure Production viability. • To decide future course of action in the well

Why Conventional Core Analysis

• The presence or absence of hydrocarbons • The storage capacity (porosity), the flow capacity and its distribution (magnitude and profile of permeability) • The lithology and texture of the formation. • Important reservoir parameter for reservoir simulation, log calibration and recovery methods throughout the life

cycle of a field.

Infrastructure available in Petrophysical Lab • Autoflood-700 • He-Porosimeter • Air permeameter • Resistivity meter • Capillary pressure apparatus • Sohxlet apparatus etc.

He-Porosimeter & Air Permeameter

Resistivity meter

Refrigerated Centrifuge

Auto Flood-700(Relative Permeameter)

CORROSION LABORATORY The Corrosion laboratory is an essential network of capabilities of testing equipment, people and facilities that provide technical innovations and engineering services in all areas of corrosion for internal customer in OIL. The Corrosion Laboratory fully involves (a) Lab scale experimental testing services and (b) Online inspection in various oil field installations for internal customers of OIL. List of Infrastructure

1. HPHT Autoclave 2. Potentiostat 3. Inverted Metallurgical Microscope 4. Stereomicroscope 5. Disk Cutter 6. Disk Polisher 7. Hardness Tester 8. Complete Water Quality Lab 9. Portable Water Quality Checker 10. Material Selection Software 11. Corrosion Monitoring System

HPHT Autoclave Potentiostat Inverted Metallurgical Microscope

Corrosion Studies Carried Out Till Date

SL. NO. DESCRIPTION STATUS

1 Tubing failure analysis of Lohali#01 Completed

2 Tubing failure analysis of NHK # 480 Completed

3 Performance of corrosion inhibitor for well acidization jobs Completed

4 Joint study with CSIR-CECRI on failure analysis of formation water disposal line in Kathaloni OCS Ongoing