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Challenging Wastewater Treatment

Authors
Cornelia Cretiu Vasiliu (_) | Dale Pierce (Brandt NOV) | Kelly Bertrand (NOV Mission)
DOI
https://doi.org/10.2118/157615-MS
Document ID
SPE-157615-MS
Publisher
Society of Petroleum Engineers
Source
International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production, 11-13 September, Perth, Australia
Publication Date
2012
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-211-1
Copyright
2012. SPE/APPEA International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production
Disciplines
1.8 Formation Damage, 4.1.5 Processing Equipment, 4.2 Pipelines, Flowlines and Risers, 4.2.3 Materials and Corrosion, 5.8.2 Shale Gas, 6.5.2 Water use, produced water discharge and disposal, 3.2.6 Produced Water Management, 6.5.3 Waste Management, 4.1.2 Separation and Treating, 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 5.2 Reservoir Fluid Dynamics, 5.8.4 Shale Oil, 5.1 Reservoir Characterisation, 2.5.2 Fracturing Materials (Fluids, Proppant)
Keywords
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Abstract
From the point-of-view of a solutions provider the wastewater treatment should be straight forward: once given the composition of the feed and the required composition of the effluent, today's technology allows formulating a set of solutions which best meets the operator's and the regulatory criteria.

The problem with wastewater in the unconventional gas exploration and production operations is that there are large volumes to be handled and treated. To add complexity, composition varies for the same well in time and varies even more from area to area of development. Also, the requirements for the cleaned fluid vary from operator to operator and by region. Moreover, management of the water based fluids is under the pressure and scrutiny of various regulating agencies: public, privately, or governmentally run. All these constraints make the vetting of treatment methods and technologies to be a very dynamic and intensive process.

Our findings during the process of formulating a set of solutions shows that a deep understanding of the problems, combined with close collaboration with the operators and regulators along with solid basic engineering practices are the key to success.

Our experience would benefit the new developments in other unconventional exploration and production area in Asia by showing the steps that were undertaken to insure solutions are up to the highest standards.

The process of finding and testing various waste water treatment technologies to formulate a flexible comprehensive set of methods will be described. Laboratory results of various samples of water will be presented as well as the challenges that were overcome for obtaining consistent, reliable analytical data. The oilfield tough requirement presented to new technologies translates as: rugged, flexible, mobile, and low cost.

Introduction
Water is a precious commodity that is needed in all human activity and for life in general. The Oil & Gas industry uses and generates large quantities of this commodity (Produced Water Volume Report). On average, for every barrel of oil produced there are eight barrels of associated wastewater. Increasing the efficiency of water usage and improving its management is both a high priority among E&P companies and a subject of intense scrutiny for the communities in which they operate.

Water Necessity in Developing Areas
The availability of suitable water for hydraulic fracturing and the means for environmentally responsible water recycling and disposal are critical for sustainable unconventional development. Produced water that comes to the surface during oil and gas recovery presents a challenge for Marcellus drillers because of the scarcity of injection wells in the Appalachian region. Other areas, like West Texas (Permian Basin or Eagle Ford Shale) do not lack for disposal options but do suffer due to the arid climate and depletion of ground water resources.

File Size  748 KBNumber of Pages   11

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