Download - Gajendra Singh(ONGC Trainning Presentation)
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
1/32
Malaviya National Institute ofTechnology,Jaipur
Presented by:-
Oil and natural gas corporation ltd.Mehsana
Gajendra Singh
2008UCH125
Presented to:-Dr. Madhu AgarwalDept. of ChemicalEngineering
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
2/32
Contents
Intro
The Organization ONGC Ltd.
Group Gathering Station.
Oil Exploration Process
Heater Treater Central Farm Tank (CFT)-santhal
Santhal GCS
GCP (gas Compreesion Plant)
ETP (Effluent Treatment Plant)
EOR Techniques
In-situ Combustion Process
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
3/32
Intro The Organization ONGCLtd.
It is a Navaratna Public Sector Unit.
It was set up on 14 August 1956.
It is a Fortune Global 500 company ranked152nd.
Indian government holds 74.14% equity stake
in this company.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
4/32
Intro The Organization ONGCLtd.
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.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
5/32
Intro ONGC Ltd. Mehsana
First well was drilled in 1964
Mehsana project was started as anindependent project in1967
Mehsana project is well known for heavy oilbelt, characterized by high viscosity crude
1500 wells at present.
Production is 6200 tones crude oil per day.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
6/32
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
7/32
OIL PRODUCTION PROCESS
The production of oil is being obtainedfrom three types of wells:
1. Self Driving.
2. Artificial liftI. 1. Sucker Rod Pumping.
II. 2. Gas Lifting.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
8/32
Sucker Rod Pumping.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
9/32
Gas Lifting
Reduction of the fluid density and thecolumn weight
Displacement of liquid slugs by large
bubbles of gas acting as pistons. Expansion of the injection gas so that
it pushes ahead of oil
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
10/32
Group Gathering Station
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
11/32
HEATER TREATER
Separate Water from oil.
Temp. 80-85deg. C
Chemical dosing
Polar Chem (Demulsifier).
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
12/32
Electrical Section
Coalescing
Waterdroplet
Dipole
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
13/32
-SANTHAL
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
14/32
an a as o ec onStation)
Functions :
To collect natural gas from wells
To collect gas from GGS
To send gas to GCP.
To send compressed gas (CG) to GGS for artificial Gas lifting.
To send CG to IFFCO,RIL, etc
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
15/32
Gas AnalysisCOMPOUND MOL%
Methane(CH4) 87.150
Nitrogen(N2) 0.160
Carbon di oxide(CO2) 1.36
Ethane(C2H6) 5.22
Propane(C3H8) 2.5
Water(H2O) 0
Hydrogen bi sulfate(H2S) 0
Carbon monoxide(CO) 0
Oxygen(O2) 0
I-butane 1.35
N-butane 0.82
I-pentane 0.36
N-pentane 0.39
Hexane 0.68
Heptane 0
Octane 0
Nonane 0
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
16/32
Santhal GCS flow diagram
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
17/32
Scrubber
Remove particulates and gases fromindustrial exhaust streams.
Inject a dry reagent or slurry into a dirtyexhaust stream to scrub out acidgases.
GasStream
Hydratedlime andSoda ash
SO2and HClremoval
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
18/32
GCP(Gas CompressionPlant) Function :
To compress gas at high pressure.
Suction Pressure : 4 kg/cm2
Discharge Pressure : 40 kg/cm2
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
19/32
Process Flow Diagram Of GCP-
Santhal
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
20/32
ETP (Effluent TreatmentPlant)
Objectives
The main objective of this plant is to collect
effluent from various GGS and CTF and totreat that water.
Finally the treated water is sent to waterinjection plant
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
21/32
EFFLUENT TREATMENT PLANT (ETP)-II(SANTHAL)
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
22/32
Clariflocculator
It consists of Big cylindrical tank with a hollowcylinder inside.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
23/32
(EOR)
The variety of methods and techniques, which permits therecovery of higher percentage of original oil in place than,would have been possible using only primary recoverymethod.
SELECTION OF EOR TECHNIQUES:
Reservoir size, geometry.
Types of reservoir drive.
Viscosity of oil at reservoir condition.
Depth of oil reservoir.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
24/32
EOR TECHNIQUES
Steam Stimulated
Steam flooding
(including hot water injection)
IN-SITU Combustion.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
25/32
-PROCESS
Continuous injection of air and water
The heat is generated within thereservoir (in-situ) by burning a portionof the oil.
Improving oil mobility by reduction ofthe viscosity of the oil
Two types of ignition process
I.
Spontaneous ignitionII. Artificial ignition
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
26/32
1. SPONTANEOUS IGNITION
The reservoir temperature must begreater than 180F and the oilsufficiently reactive.
The air is simply injected in acentrally located well.
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
27/32
2. ARTIFICIAL IGNITION
When the temp. less than180F.
The ignition accessories are loweredalong with a thermocouple wire into
the sand face Ignition accessories are usually
induced using down-hole gas
burners, electric heaters Pyrophoric agent(such as linsseed
oil)
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
28/32
IN-SITU COMBUSTION PROCESSES
1. Dry Combustion
2. Wet Combustion
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
29/32
Dry Combustion
In this process, air is first injected into aninjection well then, the oil in the formation isignited.
C
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
30/32
Wet Combustion
In the dry combustion process, much of theheat generated during burning is stored inthe burned sand behind the burning front
and is not used for oil displacement. The injected water absorbs heat from the
burned zone, vaporizes into steam, passesthrough the combustion front, and releases
the heat as it condenses in the coolersections of the reservoir
Resulting in faster heat movement and oil
displacement.
Ch i l R ti A i t d
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
31/32
Chemical Reactions Associated
with In-Situ Combustion
1. low temperature oxidation (LTO)-Temp. below 400 deg. F .
2. High temperature oxidation (HTO)-
above 650 deg. F3. The Pyrolysis Reactions.I. Dehydrogenation,
II. Cracking and
III. Condensation of aromatic compounds(benzene and other ring compounds)
-
8/3/2019 Gajendra Singh(ONGC Trainning Presentation)
32/32
THANK YOU