Design of a Gun Barrel Tank for Heavy Oil-Water Dehydration

Oil Engineer Challenges

PRESENTATION TOPICS

• Pemex: Organization and Activities

• Problem Description:

Is possible D&D heavy crude oil in a Gun Barrel?

• Methodology:

Unique Development of Thermophisics model from PVT’S analysis to plug and play on CFX (applied research).

• Goals.

• Conclusion and next steps.

They are four subsidiary bodies and besides there’s another one Pemex

International, they have been organized to carry out explotation, production,

processing and sale of hydrocarbons and their derivatives.

Pemex

Exploration and

Production

Pemex

Refinement

Pemex Gas and

Basic

Petrochemical

Pemex

Petrochemical

Pemex

Internacional

Pemex

Corporative

PEMEX: ORGANIZATION AND ACTIVITIES

PEMEX: ORGANIZATION AND ACTIVITIES

The productive chain of PEMEX: Oil Exploration and Production, Oil Refinement, Process and Conditioning of Gas, and Production of secondary Petrochemical.

PEMEX

Exploration and

Productión

Oil

Oil

Gas and

condensates

Pemex Refinement

Pemex Petrochemical

Exportation

Gasolines

Diesel

Combustoleo

Residues

Sales

Ethane

LGP

Natural gasolines

Sulphur

Methane Chain

Aromatics

Ethane Chain

Propane Chain

Natural Gas

Gas

Crudo

Gas

Oil

Reservoir

Pemex Gas and Basic Petrochemical

DOS BOCAS MARITIME TERMINAL

Pemex has implemented a technological improvement, with the incorporation of a

dehydration and desalting system of Maya oil in Dos Bocas Maritime Terminal by

means of storage tanks of 500 TB converted into Gun Barrel.

This project was developed in Dos Bocas Maritime Terminal located in Ranchería El

Limón S/N Paraíso, Tabasco, México.

SUBSTANTIAL ACTIVITIES IN THE DOS BOCAS MARITIME TERMINAL.

Oil Reception Oil

Stabilization Dehydration

and Desalting House of pumps

Storage

Exportation

National consumption

Separation battery

Gas Compression

Effluent treatment CPG Cactus

Oil

Blend Gas-oil

Injection to wells Electric

generation

Electric power for operation of the Dos Bocas

DFP

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL? Gráfica 1. Porcentaje de agua en el crudo maya recibido en TMDB

0

5

10

15

20

25

Ene Feb Mar Abr May Jun Jul Ago Sep Oct Nov Dic Ene Feb

20082007

Línea 1

Línea 2

0

1000

2000

3000

4000

5000

6000

Ene Feb Mar Abr May Jun Jul Ago Sep Oct Nov Dic Ene Feb

20082007

Línea 1

Línea 2

Gráfica 2. Contenido de sal en el crudo maya recibido en TMDB , LMB

% Water

SALT PTB

What can we do?

Stimulate wells

Electrostatic Vessel

Water treatment

...but which one is first?

Gun Barrel

Forecast

Close Production

Nothing to do

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

LIFECYCLE PROJECT PROCESS

ENGINEERING

FABRICATIONS/

CONSTRUCTION

OPERATIONS & MAINTENANCE

PROJECT

CREATION

PROJECT EJECUTION

Energy & Mass

Balance. P & IDs

Detailed

Design Requisition

Procurement

and Building

Project Management

Deliverables Management

Operation

P & IDs Procurement

and Building

Project Management

Deliverables Management

Operation

4 months 5 months 6 months 3 days

Gun Barrel

14 months 1 month

Electrostatic Vessel

5 months 4 months

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

Energy & Mass

Balance.

Detailed

Design Requisition

Heat Oil

Tank

Conversion

Pipeline

Subsea

Oil

Dehydration

&

Desalting Water

Treatment

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

DEHYDRATION AND DESALTING IN THE DOS BOCAS

Heating options

Advantages and benefits

1. Avoid the shipment of 130,000 Tons

CO2 annual.

2. 5 MMFCD approx. of natual gas not

burned.

3. Reduces the temperature of waste

correspondents’ gases to the

atmosphere, diminishing the GLOBAL

HEATING.

Gas

5 MMFCD

Typical Design

Oil

thermal 400°C

Ecological Design

RECUPERATOR HEAT

300°C

Oil

thermal

30°C 60°C 600 TBD

Oil thermal

Dehydrator Desalter

Exchanger

PROJECT IN CER’s

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

PROJECT IN CERTIFIED EMMISION REDUCTION (CER’s)

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

In the Gun-Barrel tanks the feeding hydrated oil is carried out for the

bottom through a distributor.

Conventional hydraulic efficiency in GB 1-21%,

best 65-80% (distributor).

DISTRIBUTOR

TANK 500 TB

HOLE 3 AND 9 HS HOLE 5 AND 7 HS

HOLE 3, 5, 7 AND 9 HS

HOLE 3 AND 9 HS HOLE 5 AND 7 HS

HOLE 3, 5, 7 AND 9 HS

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL? In the Gun-Barrel tanks, the associated water in the oil enters in contact with

the interface, in order to the water drops have coalescence and fall them out,

the outputs of dehydrated oil are on the top and the water is drained in the

bottom.

Diameter 12in.

Diameter 36in.

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL? By mean ANSYS-CFD simulation it was determined that the Gun-Barrel tank

whit 500 TB capacity operates with flows of 450-750 TBD of oil, this is

possible reaching quality with values inside the contractual requirements of

0.5% vol. of water and 50 PTB of salt maximum.

IS POSSIBLE D&D HEAVY CRUDE OIL IN A GUN BARREL?

Internal Gun Barrel tanks Patent Design

GOALS

Unique system D&D on line for 600 TBD heavy oil.

Permanence in the global market offering quality oil.

Construction record time.

$350 Millions USD by year Penalties off.

CONCLUSION AND NEXT STEPS

The project expectations were complete covered by the good design

distributor with ANSYS-CFD.

The prediction by ANSYS simulation between the real behavior is also

the same because the desviation was 1%.

The great real results about this system have broken paradigms, so much

that Pemex is now constructing an additional system.