A novel silica aerogel microspheres loaded with ammonium persulfate gel breaker for mid-deep reservoirs
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As one of the important additives in the process of petroleum’s exploitation, the gel breaker is a key factor to determine whether the exploitation can be completed successfully. Here, a novel porous SiO2 aerogel microsphere loaded with ammonium persulfate (aAPS) with obvious delay-releasing performance under higher temperature and pressure was synthesized by the process of sol–gel and water-in-oil (W/O) inverse emulsion polymerization. The obtained gel breaker was characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The releasing rate of ammonium persulfate of gel breakers under different conditions was determined by pH meter method. The results show that the loading of APS is about 53 wt% and the releasing rate is significantly affected by temperature and time.
The preparation of a novel silica aerogel-based gel breaker by a simple and industrialized method.
The releasing rate of the gel breaker can reach about 65% at the temperature of 70 °C.
The gel breaker has obvious delay-releasing performance under high temperature and pressure, which can reach about 120–130 min when the temperature reaches up to 70 °C.
SiO2 as an environmentally friendly material, instead of polymer materials, greatly reduces the pollution to the environment.
KeywordsSilica aerogel Microspheres Gel breaker Ammonium persulfate
This work was supported by the National Natural Science Foundation of China (51572014 and 51272019).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.
Informed consent was obtained from all individual participants included in the study.
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