E3S Web Conf.
Volume 329, 20214th International Conference on Green Energy and Sustainable Development (GESD 2021)
|Number of page(s)||5|
|Published online||09 December 2021|
Effect of nano pour point depressant on the flow properties of the waxy crude oil from Changqing Oilfield
1 Xi’an Changqing Chemical Group Co. Ltd, Xi’an Shaanxi, 710068, China
2 The Second Oil Delivery Office of Changqing Oilfield, Xi’an Shaanxi, 710068, China
3 The First Oil Delivery Office of Changqing Oilfield, Xi’an Shaanxi, 710068, China
4 Xi’an Key Laboratory of Tight oil (Shale oil) Development, Xi'an Shiyou University, Xi’an, 710 065, China
* Corresponding author: firstname.lastname@example.org
In this paper, graphene oxide (GO) was modified with alkyl amidopropyl diethanolamine to obtain a nano pour point depressant (GO-PPD), which was used to improve the flowability of the waxy oil extracted from Changqing Oilfield, China. Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), polarized optical microscopy (POM) and viscometer were employed to evaluate the performance of the GOPPD. The results showed that compared with traditional pour point depressant (PPD), the GO-PPD exhibited higher performance in promoting the flowability of waxy crude oil. With the presence of 500 mg/kg GO-PPD in the waxy crude oil, the pour point of which could be reduced by 5.5 °C. Also, with the presence of 500 mg/kg GO-PPD, the viscosity reduction rate of the waxy crude oil can reach up to 52% at 30 °C. Through the observation via polarized microscopy, we have also found that with the introduction of GO-PPD in the crude oil, the formation of the wax crystals can be greatly retarded. This confirmed that the graphene oxide derivates could also be served as PPD, which facilitates the flowability of certain crude oil (e.g., waxy crude oil from Changqing Oilfield).
© The Authors, published by EDP Sciences, 2021
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