Polyethylene Glycol Drilling Fluid for Drilling in Marine Gas Hydrates-Bearing Sediments: An Experimental Study

Guosheng Jiang, Tianle Liu, Fulong Ning, Yunzhong Tu, Ling Zhang, Yibing Yu and Lixin Kuang
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Guosheng Jiang: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Tianle Liu: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Fulong Ning: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Yunzhong Tu: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Ling Zhang: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Yibing Yu: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China
Lixin Kuang: Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China

Energies, 2011, vol. 4, issue 1, 1-11

Abstract: Shale inhibition, low-temperature performance, the ability to prevent calcium and magnesium-ion pollution, and hydrate inhibition of polyethylene glycol drilling fluid were each tested with conventional drilling-fluid test equipment and an experimental gas-hydrate integrated simulation system developed by our laboratory. The results of these tests show that drilling fluid with a formulation of artificial seawater, 3% bentonite, 0.3% Na 2 CO 3 , 10% polyethylene glycol, 20% NaCl, 4% SMP-2, 1% LV-PAC, 0.5% NaOH and 1% PVP K-90 performs well in shale swelling and gas hydrate inhibition. It also shows satisfactory rheological properties and lubrication at temperature ranges from ?8 °C to 15 °C. The PVP K-90, a kinetic hydrate inhibitor, can effectively inhibit gas hydrate aggregations at a dose of 1 wt%. This finding demonstrates that a drilling fluid with a high addition of NaCl and a low addition of PVP K-90 is suitable for drilling in natural marine gas-hydrate-bearing sediments.

Keywords: marine gas hydrate; drilling fluid; polyethylene glycol; kinetic inhibitor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2011
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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