Preparation and performance of AMPS/AA/DMAA/SA copolymer as a filtrate reducer for oil well cementing

Abstract

A new water‐soluble polymer was prepared and evaluated as a filtrate reducer for oil well cementing. The filtrate reducer (WSP) was synthesized from 2‐acrylamido‐2‐methylpropane sulfonic acid (AMPS), acrylic acid (AA), dimethyl acrylamide (DMAA), and sodium allylsulfonate (SA) by aqueous free radical polymerization. The synthesis conditions were optimized by orthogonal experiment. The molecule structure of the synthesized copolymer (WSP) was verified by Fourier transformer infrared spectrum (FTIR) and nuclear magnetic resonance hydrogen spectroscopy (1H‐NMR). The molecule weight of the synthesized copolymer was determined by gel permeation chromatography (GPC). The thermal stability of the synthesized copolymer was tested by thermogravimetry and differential thermogravimetry (TG and DTG). When the dosage of WSP is up to 3% in fresh water cement slurry, the FLAPI can be controlled within 58 mL. In 37% salt water cement slurry, the FLAPI can be controlled within 90 mL when the dosage of WSP is 5%. The thermal degradation of WSP is not obvious before 289 °C. Compared with a commercial filtrate reducer BS‐100L and a reported copolymer HTF200C, the WSP has better performance. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43824.

Synthesis and characterization of SSS/HAM/AA terpolymer as a fluid loss additive for oil well cement

“…Obviously, the different monomer ratio in the polymerization reaction will have a great impact on the polymerization product, thus affecting its performance. However, due to induced decomposition and the cage effect, the amount of initiator has the greatest impact on the free radical polymerization . The order of the influence on the filtration loss is D > A > C > E > B.…”

“…The number average molecular weight ( M n ) is 4.7 × 10 5 , the weight average molecular weight ( M w ) is 7.5 × 10 5 , and polydispersity index (PDI) of the prepared sample is 1.811, which indicated that macromolecular polymer have been generated. The relatively high molecular weight and the broad PDI are typical for a radical polymerization . The terpolymer molecular weight and its particle size in solvent have a close relationship.…”

“…The results showed that the thermal degradation of tetrapolymer was not obvious before 273.2 °C. Tang et al . studied the thermal degradation process of AMPS/AA/DMAA/SA, the results show that when the temperature is lower than 289 °C, there is no significant thermal degradation.…”

“…In the field of oil and gas well cementing, steel pipes (casings) are placed into the borehole, and then the annular space between the casing and the borehole is sealed with cement slurry in order to stabilize the borehole, keep the casing in place . There is no doubt that the cementing job is a critical and challenging operation, not only during drilling, but also for all remaining period of production . For more than 50 years, cement additives such as fluid loss additives (FLAs) have been added to oil‐well cement slurry and it is now recognized in the industry that the quality of cementing jobs have significantly improved.…”

Preparation and characterization of a novel amphoteric polymer for oil well cementing with superior performances

“…Nowadays, most of FL control additives (filtrate reducer) are water-soluble synthetic polymer products. 6 Tiemeyer and Planck reported that a synthetic polymer based on allyloxy-2-hydroxy propane sulfonic acid exhibited excellent FL performance. 7 Nunes et al synthesized new spherical microparticles.…”