TY  - JOUR
EP  - 29
SN  - 17919320
PB  - International Hellenic University - School of Science
N1  - cited By 4
SP  - 25
TI  - Performance of different acids on sandstone formations
AV  - none
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891763958&doi=10.25103%2fjestr.063.05&partnerID=40&md5=957ffa6ab40d6bfa27c81169f20e90bb
A1  - Zaman, M.A.
A1  - Alam, M.M.
A1  - Matin, M.A.
JF  - Journal of Engineering Science and Technology Review
VL  - 6
Y1  - 2013///
N2  - Stimulation of sandstone formations is a challenging task, which involves several chemicals and physical interactions of the acid with the formation. Some of these reactions may result in formation damage. Mud acid has been successfully used to stimulate sandstone reservoirs for a number of years. It is a mixture of hydrofluoric (HF) and hydrochloric (HCl) acids designed to dissolve clays and siliceous fines accumulated in the near-wellbore region. Matrix acidizing may also be used to increase formation permeability in undamaged wells. The change may be up to 50 to 100 with the mud acid. For any acidizing process, the selection of acid (Formulation and Concentration) and the design (Pre-flush, Main Acid, After-flush) is very important. Different researchers are using different combinations of acids with different concentrations to get the best results for acidization. Mainly the common practice is combination of Hydrochloric Acid - Hydrofluoric with Concentration (3 HF - 12 HCl). This paper presents the results of a laboratory investigation of Orthophosphoric acid instead of hydrochloric acid in one combination and the second combination is Fluoboric and formic acid and the third one is formic and hydrofluoric acid. The results are compared with the mud acid and the results calculated are porosity, permeability, and FESEM Analysis and Strength tests. All of these new combinations shows that these have the potential to be used as acidizing acids on sandstone formations. © 2011 Kavala Institute of Technology.
IS  - 3
KW  - Acidization; Boreholes; Chlorine compounds; Hydrochloric acid; Orthophosphoric acid; Sandstone; Well stimulation
KW  -  Acidizing; Formation permeability; Laboratory investigations; Mud acid; Physical interactions; Sandstone formations; Sandstone reservoirs; Stimulation
KW  -  Hydrofluoric acid
ID  - scholars3905
ER  -