| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1757582 | Journal of Natural Gas Science and Engineering | 2015 | 12 Pages |
•Enhancing the behavior and properties of CGA drilling fluid.•Use of SDS anionic and CTAB cationic surfactant in CGA.•Effect of XG and CMC biopolymers in formulating CGA.•Rheological modeling of CGA fluids.
Colloidal Gas Aphron (CGA) are finding increasing application in fields of science and engineering because of their distinctive characteristic. As interest in the application of CGA based fluids grows and in order to select the best procedure for using them in successful petroleum engineering operations, there is a need to gain a better understanding of the factors that affect their properties and behavior. This article discusses the rheological characterization, stability analysis and filtration properties of CGA based fluids for three bio-polymers and two ionic surfactant. The stability and filtration analysis were investigated with the static drain rate technique and API filtration tests, respectively. Sodium Dodecyl Sulfate (SDS) anionic surfactant, Cetyl Trimethyl Ammonium Bromide (CTAB) cationic surfactant, and an environmentally friendly bio-polymer i.e. starch, Xanthan Gum (XG) and Carboxy Methyl Cellulose (CMC) have been used in formulating the CGA based fluids. Results revealed that ionic surfactants improved the physico-chemical properties of the CGA based fluids, and this improvement was enhanced more by the use of XG bio-polymer. CGA based fluids produced by XG biopolymer and SDS anionic surfactant showed the best behavior. Also, CGA based fluids provided by CMC and CTAB cationic surfactant had the lowest stability. The shear thinning behavior of prepared the CGA based fluid was approved by fluid flow indexes ranging between 0.08 and 0.47. In addition, the parameters of eight rheological models, e.g. fluid flow index, consistency and yield point were determined by fitting experimental data. The results of this article will be helpful to better understand the role of bio-polymers and ionic surfactants on the physico-chemical characteristic of CGA based fluids.
