Determination of residue content of seawater-based on-line mixing polymer fracturing fluid by vacuum filtration method

Abstract

In response to the inability of centrifugation to accurately detect the residue content of seawater-based on-line mixing polymer fracturing fluid, a vacuum filtration method was proposed. According to the separation range of broken particle size of guanidine gum system fracturing fluid in centrifugation, the filter paper with appropriate pore size was determined. Meanwhile, the effects of filter sample volumes, distilled water cleaning and petroleum ether cleaning on the assay data were also investigated to determine the optimal operating conditions. The results indicated that the detection data with good parallelism and high accuracy could be obtained by using a filter paper with the pore size of 38-45 μm, 100 mL of filter sample, 75 mL of distilled water, and 100 mL of petroleum ether. The residue content was measured as 188 mg/L, and the residue yield was 98.2%. In addition, this method was still applicable to the test of residue content in polymer fracturing fluid 1510 and 7130.

Keywords

• on-mixing
• polymer fracturing fluid
• residue content
• vacuum filtration
• centrifugation