Oilfield Water Treatment and Management Solutions

Qatar Petroleum

January 12, 2016

Introduction

MWH Is a $1.3B Engineering, Science, Construction, Project Development, and Research Firm

• Safety First Culture With An Experience

Modification Rate of 0.56 (2015)

• Serving Water, Environment, Energy & Natural

Resources Markets across the globe

• Privately Held, Employee-Owned

• Global Headquarters Broomfield, Colorado

• Serving Private, State & Local Government,

and Federal Clients

• Engineering and consulting presence in the

Middle East for over _____ years.

Our Corporate History Extends Back to 1820 With An Initial Focus on Water Infrastructure

Water Treatment Engineers May Have Used Our Textbook In Their University Training – We wrote the book on water treatment

MWH Is a Global Operation With 7,000 Employees in 180 Offices in 35 Countries

AMERICAS

3,750 employees

EUROPE & MIDDLE EAST

2,000 employees

1,250 employees

ASIA PACIFIC

MWH Has Served the Oil & Gas Industry for 30+ Years Starting w/ the Alyeska BWT Plant in Alaska

Orig

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• Produced Water Planning, Engineering and Construction – Produced Water Treatment Options including emerging technologies and equipment

verification. – Pilot Tests– Produced Water Pond Complex– Irrigation Systems– Filtration, UF, RO Ion Exchange, silica removal and thermal distillation processes

• MWH role:– Owners Representative & consultant

Services Provided– Evaluation– Optioneering– Detailed Design– Engineering Support– Construction Support

A Recent Major Project in Australia – From Alaska to Australia

Produced Water Treatment and Water Management

MWH Understands That Oilfield Water Treatment and Management Provides Special Challenges

1. Flexibility is the Most Important Criterion Given the Dynamic Nature of Oilfield Development

2. Engineering Solutions Must Be Adaptable to the Unique Characteristics of Each Play

3. Many Plays Are Remote4. Hydrocarbons Provide Revenue, Water Is Just a

Cost

Developing a Combined Fluid / Water Management Strategy

• Items to be Reviewed and Analyzed– Water Volume/Flow– Influent Water Quality– Effluent/Reuse Water Quality Requirement– Length of Project– Reservoir-Centered Approach

• Solutions– Develop water quality treatment specifications based on actual reused objective utilizing:

• Economics as the driver for operational choices• Minimalist approach to water treatment = reduced costs and waste

– Design water handling and conveyance that compliments water quality treatment objectives.• For example not introducing pumping prior to hydrocyclones as that may increase oil emulsification.• Provide sufficient storage pre and post the treatment to manage water flow and water quality

objectives.

Minimizing Costs and Waste

• Best Use of Treatment Capital is on Equalization– Flow– Water Quality

• Allow water to treat itself• Reduced chemical usage = reduced waste• No system upsets• Equipment can be optimally sized

No one treatment technology works in all cases

Minimizing Costs and Waste

• Contaminant Removal Sequence1. Settlable Solids + Free Oil (large droplets > 150 micron) – Gravity’s free2. Suspended Solids3. Dispersed Oil4. Dissolved Phase Organics5. Dissolved Solids

a) Multivalents – Scale; Dynamic/Engineered Waterb) Monovalents - Corrosion

• Selecting Proper Technology for the Reuse Goal– Every technology has its role; the goal is applying in its correct situation

Treatment Design: Specific Design for Specific Operation -“MINIMALIST” APPROACH = Lowest Cost Less Waste

• Potential Treatment Trains for O&G and Solids Removal

MWH Project Experience Examples

Produced Water Treatment and Injection Plant - Waterflooding – Ecopetrol Alianza, Casabe Field, Colombia

Problem• Antiquated existing oil water separation equipment, existing

heater treaters, and poor chemical selection was causing significant O/W emulsion issues.

• The client was discharging high concentrations of saleable oil to the Magdalena River in violation of newly promulgated regulatory requirements

• The client desired to solve this problem and recover this saleable asset through the design of a field-wide reuse solution

MWH provided the selected solution.

Produced Water Treatment and Injection Plant - Waterflooding – Ecopetrol Alianza, Casabe Field, Colombia

Scope of Work:• MWH provided engineering and

design for the:– Conveyance of produced water from four

geographically separated collection sites to a centrally located treatment facility;

– Treatment of produced water focused on reducing oil and grease (O&G 5,000 mg/l PW concentration) to less than 5 mg/l and removing all total suspended solids (TSS) greater than 2.4 microns (PW average > 12 microns)

– Upgrading the existing water injection pumping system for a 200,000 barrel per day facility to support field-wide reuse of produced water in waterflooding operations

MWH with CADD 3D software with a Mviper video of the treatment plant

Produced Water Treatment and Injection Plant - Waterflooding – Ecopetrol Alianza, Casabe Field, Colombia

Treatment Solution:• The treatment process selected and designed included:

– Multi-acre lined impoundments acting as both equalization and four phase separators;

– An emulsion breaking chemical injection system;– Inclined plate separators;– Coagulant/flocculant chemical injection;– Dissolved air flotation; and – On-call filtration for both O&G adsorbent filters or TSS filters only when limits

exceeded.

NGL High Sierra - Produced Water Treatment Plant Upgrades and Surface Discharge, Pinedale Anticline, Wyoming

Problem• Upgrade the existing produced water treatment

facility to:– Ensure compliance with state and federal water discharge

requirements.– Improve and increase the efficiency of downstream

treatment devices by improving the front end treatment devices.

– Meet state and federal air emission regulations.

NGL High Sierra - Produced Water Treatment Plant Upgrades and Surface Discharge, Pinedale Anticline, Wyoming

Scope of Work:• MWH provided engineering, design and construction

to upgrade an existing 50,000 barrel per day commercial produced water treatment plant that:– Accepted produced water from numerous oil and

gas producers both via truck and conveyance pipelines.

• Contaminants in the produced water included free oil and gross solids, suspended solids, dissolved organics, heavy metals, and inorganics such as boron and selenium.

– Was not in compliance with state and federal air emission regulations.

– Required compliance with state and federal water discharge requirements.

NGL High Sierra - Produced Water Treatment Plant Upgrades and Surface Discharge, Pinedale Anticline, Wyoming

Treatment Solution:• The treatment process selected and designed included:

– Replacing the front end oil water separators and improving the de-sanding operations;

– Adding induced/dissolved gas flotation;– Installing covers, blowers, piping, and regenerative thermal oxidizers to destroy

volatile organics emissions;• MWH provided detailed drawings of the facility design, including equipment

sizing and flow limits for particular process equipment. • MWH also provided construction management oversight during facility

construction enhancements and provided permitting support as the client’s engineer of record for this unique facility.

Anadarko Petroleum - Produced Water Facilities Design/Build Services, Vernal, Utah

Problem:• Anadarko had run out of capacity with

their salt water injection wells and the local commercial salt water disposal facility had to limit the amount of water they could take from oil and gas operators.

• Produced water required handling and treatment as such work needed to occur rapidly and efficiently.

Anadarko Petroleum - Produced Water Facilities Design/Build Services, Vernal, Utah

Scope of Work• MWH was hired by Anadarko to engineer and construct three produced

water management and treatment systems at three separate locations in their Natural Buttes field in the Uinta Basin, Utah.

• The objective of the treatment systems were to treat the water to:– Minimize potential for sheen on storage ponds;– Treat the water to be reused for drilling and fracing operations;– Provide condensate recovery.

• The size of each treatment system was 10,000 BPD and the constituents were oil, TSS and TDS.

Anadarko Petroleum - Produced Water Facilities Design/Build Services, Vernal, Utah

Treatment Solution:• Initially provided temporary treatment systems at each location which consisted of oil/water

separators, walnut shell filters, and MYCELX filters. • MWH designed and built permanent treatment facilities at each of the three sites using the same

processes as the temporary system. • MWH designed and built water truck off-load stations with electronic tracking and security systems

for each of the sites.• MWH also assisted Anadarko with permit applications to build two 350,000 barrel, double-lined

(HDPE) ponds at each of the three systems (six total ponds). MWH constructed the ponds and the associated management facilities, much of which had to be sited on rocky terrain.

• The system worked well and paid for itself many times over in revenues from condensate recovery and reduced transportation and disposal costs.

• Based on these improvements, Anadarko received a 2008 Earth Day Award from the Utah Board of Oil, Gas & Mining.