The influence of shape memory on the performance of polymers used for sand control in hydrate production wells

QIANG Siqi; SUN Youhong; ZHANG Guobiao; SHEN Yifeng; SUN Ying and LI Bing; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.06.001

2023 Vol. 50, No. 6

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Article navigation > DRILLING ENGINEERING > 2023 > 50(6): 1-10

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QIANG Siqi, SUN Youhong, ZHANG Guobiao, SHEN Yifeng, SUN Ying and LI Bing, . 2023. The influence of shape memory on the performance of polymers used for sand control in hydrate production wells. DRILLING ENGINEERING, 50(6): 1-10. doi: 10.12143/j.ztgc.2023.06.001

Citation:

QIANG Siqi, SUN Youhong, ZHANG Guobiao, SHEN Yifeng, SUN Ying and LI Bing, . 2023. The influence of shape memory on the performance of polymers used for sand control in hydrate production wells. DRILLING ENGINEERING, 50(6): 1-10. doi: 10.12143/j.ztgc.2023.06.001

The influence of shape memory on the performance of polymers used for sand control in hydrate production wells

School of Engineering and Technology, China University of Geosciences, Beijing 10083, China

Received Date: 15 September 2023

Revised Date: 15 September 2023

Abstract

Abstract

The shape memory polymer sand control system has been successfully applied in the second phase of natural gas hydrate production in Japan. However， the effects of the shape memory on the pore-permeability characteristics and sand control performance of polymers is rarely researched. Therefore， in this paper， a shape memory polymer sand control material taking the polyurethane as the matrix is developed. The polymer’s shape memory characteristics as well as the changes in pore-permeability and mechanical strength before and after the shape memory process are investigated and the sand control performance is also evaluated. The results revealed that the developed porous polyurethane shows excellent shape memory characteristics and pore-permeability properties： the shape fixed rate exceeded 98%， the shape recovery rate reached 100%， the shape memory temperature was 59.8°C， the permeability remained at approximately 10D before and after the shape memory process， and the compressive strength was maintained at around 1MPa. The mercury injection tests indicated that the shape memory process is a compression-rebound process for the polyurethane material with large pores， which will lead to some changes in the internal structure of the material， resulting in a slight decrease in compressive strength and a small increase in permeability after complete shape recovery. The sand control performance tests indicated that a small amount of sand production occurred only in the initial test， and the presence of sand particles caused some damage to the permeability of the polyurethane material， however， the permeability could still be maintained at around 10 D for the fully recovered polyurethane. According to the comprehensive performance analysis of the above materials， the developed shape memory polyurethane material can be used in conjunction with a mechanical sand control screen pipe， which could meet the requirements of sand control in hydrate production wells.
- natural gas hydrate /
- shape memory polymer /
- porous polyurethane /
- sand control /
- permeability /
- pore structure

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References

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