Synthesis and Performance of a Salt Resistant Swelling Preventive Aqueous Emulsion Drag Reducer

HUANG Jing

doi:10.12358/j.issn.1001-5620.2025.03.018

Volume 42 Issue 3

Jun. 2025

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HUANG Jing.Synthesis and performance of a salt resistant swelling preventive aqueous emulsion drag reducer[J]. Drilling Fluid & Completion Fluid，2025, 42（3）：406-412 doi: 10.12358/j.issn.1001-5620.2025.03.018

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HUANG Jing.Synthesis and performance of a salt resistant swelling preventive aqueous emulsion drag reducer[J]. Drilling Fluid & Completion Fluid，2025, 42（3）：406-412 doi: 10.12358/j.issn.1001-5620.2025.03.018

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Synthesis and Performance of a Salt Resistant Swelling Preventive Aqueous Emulsion Drag Reducer

doi: 10.12358/j.issn.1001-5620.2025.03.018

HUANG Jing

Sinopec research institute of Petroleum Engineering Co., Ltd., Beijing 102206

Received Date: 2024-12-24
Rev Recd Date: 2025-01-19
Publish Date: 2025-06-12

Abstract

Abstract

Common inverse emulsion drag reducers have poor salt resistance and hence are unable to be formulated with high salinity formation water and water flowed back in formation fracturing operations. These drag reducers are generally single-functioned, expensive and contain oil phase that causes formation damage. To solve these problems, a new salt-resistant swelling-preventive oil-free aqueous emulsion drag reducer has been developed through aqueous dispersion polymerization. Laboratory evaluation with friction tester and rheometer of the new drag reducer in a slick water system showed that this drag reducer has good stability, and is able to instantly dissolve in water in 15 seconds. The cationicity of the drag reducer is 15.98%. A fracturing fluid formulated with 100,000 mg/L saltwater has viscosity that is not affected by the high salinity of the saltwater. The drag reducer works normally at temperatures up to 180℃. A slick water formulated with this drag reducer was used in field operation, the drag of the slick water was reduced by 82% and swelling inhibition capacity was enhanced by at least 60%. With this drag reducer, high drag reduction rate, online formulation and clay swelling inhibition can be simultaneously achieved, the so-called “one additive with multifunction”. This study has provided a new clue for simplifying fracturing fluid formulation process, lowering operation cost and developing new fracturing fluids with enhanced fracturing efficiencies.
- Salt resistant drag reducer,
- Swelling prevention,
- Dispersion polymerization,
- Slick water,
- Acrylamide

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References(28)

References

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Synthesis and Performance of a Salt Resistant Swelling Preventive Aqueous Emulsion Drag Reducer

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