RELTREAT

Water Control and Reduction Technologies

Edition Date :
October 12, 2017

RELTREAT technology was developed to create a unique, environmentally friendly, and relatively permeable modification system for offshore use. Clariant Oil Services developed this polymer chemistry, which is co-deployed with a crosslinker via a bullhead treatment. The polymer attaches first to the water-wet rock surface, and the reversible gel builds up from the rock surface into the water layers. The versatile chemical system allows for the simple deployment of a vast array of reservoir environments from 10mD to 20D at temperatures between 30°C to 140°C. Treatment packages are specifically designed and tailored to suit the application depending on well requirements. RELTREAT can be used in sandstone and carbonate formations, being suitable for use in both oil and gas reservoirs. The RELTREAT technology consists of a polymer and a crosslinker which are co-deployed in a single stage treatment into the reservoir rock. During shut in, the polymer and crosslinker react together to form a flexible, open hydrated polymer network that bridges across the pore spaces. Unlike cement or stiff gel, the polymer network does not prevent fluid flow through the pores. Where there is water production, the interaction of the water molecules with the polymer network causes resistance to flow, reducing the permeability of the formation to water. In oil and gas producing zones, the pressure gradient pushes the hydrocarbons into the network displacing water and causing it to dehydrate and collapse. The dehydrated network remains in the formation but provides minimal resistance to oil or gas flow. In the event of subsequent water production, the system is capable of rehydrating and providing resistance. The overall effect of the treatment on a well is, therefore, to reduce produced water while increasing oil and gas production significantly.

The RELTREAT technology has been deployed globally with 54 jobs in Colombia, 28 jobs in the US onshore, three treatments GOM offshore and 37 treatments offshore the North Sea. Demonstrating several benefits such as a water retardant, oil enhancer by increasing effective permeability in the near wellbore area, use in injector wells to improve reservoir sweep, sand control, maintain reservoir support, enhance drawdown and also to increase scale squeeze lifetime. The RELTREAT system consists of a polymer and a crosslinker which are co-deployed in a single stage treatment into the reservoir rock. An easy to deploy, low-risk treatment. None of the treatments failed, and even water reduction is the primary target of such relative permeability modifier applications in more than 95% of the treatments the oil production increased significantly up to 60% in selected cases over the lifetime of the treatment which varied from 3-12 months. Economic payback time ranged from 4 days to 1 month of the treatments. Overall a low risk, easy to deploy cost-effective method to boost oil recovery rates of producer wells.

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Sam Pruett

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  • Benefits

    When squeezed into a formation, RELTREAT water control and reduction technologies have selectively reduced water production, enhanced hydrocarbon production, reduced operating expenses, and extended the productive life of wells. 
  • Safety and MSDS

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    Please contact us for safety and regulatory details or the Material Safety Data Sheet (MSDS).

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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application. 


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