Oil and natural gas corporation ltd. Ahmedabad

CONTENTS• Intro – The Organization ONGC Ltd.• Group Gathering Station.• Oil Exploration Process• Heater Treater• Central Farm Tank (CFT)-• GCP (gas Compreesion Plant)• ETP (Effluent Treatment Plant)• Desalter• Projects etc.

INTRODUCTION TO ONGC Ltd.

• It is a Maharatna Public Sector Unit. • It was set up on 14 August 1956.• It is a Fortune Global 500 company ranked 152nd.• Indian government holds 74.14% equity stake in this company.• Contributes 77% of India's crude oil production and 81% of India's natural gas

production. • It produces about 30% of India's crude oil requirement. • It produced 27 MMT Crude Oil and 26 bcm Natural Gas in 2009-10.

What ONGC actually do?

IT really don’t perform any gigantic task related to chemical engineering.

Third step

Further cleaning Selling gas and oil and having fun

Second step

Cleaning oil Separation of oil, water and gas

First step

Digging And more digging

OIL PRODUCTION PROCESSThe production of oil is being obtained from three types of wells:

1. Self Driving.2. Artificial lift

I. 1. Sucker Rod Pumping.II. 2. Gas Lifting. III. 3. water injectionIV. 4. Polymer injection

Artificial Lift1. Sucker Rod Pumping

Artificial Lift1. Sucker Rod Pumping

Group Gathering station

Group Gathering Station

HEATER TREATER• Separate Water from oil.• Temp. 80-85deg. C• Chemical dosing Polar Chem (Demulsifier).

Electrical Section

GCP(Gas Compression Plant)

• Function : To compress gas at high pressure.

• Suction Pressure : 4 kg/cm2

• Discharge Pressure : 40 kg/cm2

Scrubber• Remove particulates and gases from industrial exhaust

streams.

• Inject a dry reagent or slurry into a dirty exhaust stream to “scrub out” acid gases.

DESALTER PLANT

ETP (Effluent Treatment Plant)

Objectives

The main objective of this plant is to collect effluent from various GGS and CTF and to treat that water.

Finally the treated water is sent to water

injection plant

EFFLUENT TREATMENT PLANT (ETP)-II (SANTHAL)

Project Description• 1. VARIFY HEAT EXCHANGER DESIGN AT KALOL CTF

• 1. To study the Heat Exchanger assembly installed at CTF. • 2. To Design and check the efficiency of the installed heat

exchangers • 3. Suggestions maximize the efficiency of the heat exchangers

Project At Kalol GGS• 2. DETERMINATION OF OPTIMUM PRESSURE REQUIRED TO

TRANSPORT THE NATURAL GAS FROM VARIOUS GGS TO GCS.

objective• The compressor station require suction pressure of 3.5 kgf/cm2, so the

purpose was to get an optimum pressure at separator by designing proper pipeline so that gas production is maximum and at the same time gas is delivered at GCS at 3.5 kgf/cm2 and to keep pressure at Group separator to its optimum so that gas production is not affected by the back pressure.