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New Salt-Tolerant Friction-Reducer System Enables 100% Reuse of Produced Water

Fig. 1—The new FR outperformed conventional FR in water with 200,000 ppm TDS.

To continue to treat multiple clusters in longer laterals effectively, even for stages near the toe, a robust friction-reducer (FR) system typically is required to overcome pipe friction. Additionally, using a single FR system throughout the entire treatment that can tolerate various water sources of varying salinity up to 300,000 ppm is imperative. This paper discusses the field trials of a new salt-tolerant FR system in the Marcellus Shale.

Introduction

FRs are used to enable high-rate pumping of water while maintaining lower treating pressures in both slickwater fracturing and coiled-tubing stimulation applications. Typically, the performance of conventional acrylamide/acrylic acid copolymer or partially hydrolyzed polyacrylamide-based FRs diminishes as the dissolved-ion content of the source water increases and can be dependent on both the type and the concentration of ions present in the source water. Because of this limitation, flowback and produced water used for slickwater applications are often diluted with a freshwater source to maintain adequate friction-reducing performance. To enable the use of 100% produced water, new friction reducers have been developed that are capable of providing near-freshwater performance in flowback and produced water exceeding 300,000 ppm total dissolved solids (TDS).

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 184052, “Case Study: A New Salt-Tolerant Friction-Reducer System Enables 100% Reuse of Produced Water in the Marcellus Shale,” by Liang Xu, SPE, Multi-Chem, a Halliburton Service; Paul Lord, Halliburton; Justin Koons and Todd Wauters, SPE, Multi-Chem, a Halliburton Service; and Sam Weiman, EQT, prepared for the 2016 SPE Eastern Regional Meeting, Canton, Ohio, USA, 13–15 September. The paper has not been peer reviewed.
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New Salt-Tolerant Friction-Reducer System Enables 100% Reuse of Produced Water

01 December 2017

Volume: 69 | Issue: 12

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