TY - JOUR
T1 - Removal of water-based filter cake and stimulation of the formation in one-step using an environmentally friendly chelating agent
AU - Elkatatny, Salaheldin M.
AU - Nasr-El-Din, Hisham A.
PY - 2014
Y1 - 2014
N2 - Chelate solutions, GLDA (pH of 3.3 to 13) and HEDTA (pH of 4 and 7) were incompatible with a-amylase over a wide range of temperatures. GLDA (pH 3.3) and HEDTA (pH 4) can be used to remove the filter cake in one step. GLDA (20 wt% in a 200 g solution and pH of 3.3) and HEDTA (20 wt% in a 200 g solution and pH 4) had 100% removal efficiency of the filter cake. The retained permeability was 110% and 106% for Berea sandstone and Indiana limestone cores, respectively when using GLDA (13.3 wt% in 300 g solution and pH of 3.3). The retained permeability was 115% and 100% for Berea sandstone and Indiana limestone cores, respectively when using HEDTA (20 wt% in 200 g solution and pH of 3.3). No core damage was observed when using GLDA and HEDTA solutions as a breaker to remove water-based filter cake.
AB - Chelate solutions, GLDA (pH of 3.3 to 13) and HEDTA (pH of 4 and 7) were incompatible with a-amylase over a wide range of temperatures. GLDA (pH 3.3) and HEDTA (pH 4) can be used to remove the filter cake in one step. GLDA (20 wt% in a 200 g solution and pH of 3.3) and HEDTA (20 wt% in a 200 g solution and pH 4) had 100% removal efficiency of the filter cake. The retained permeability was 110% and 106% for Berea sandstone and Indiana limestone cores, respectively when using GLDA (13.3 wt% in 300 g solution and pH of 3.3). The retained permeability was 115% and 100% for Berea sandstone and Indiana limestone cores, respectively when using HEDTA (20 wt% in 200 g solution and pH of 3.3). No core damage was observed when using GLDA and HEDTA solutions as a breaker to remove water-based filter cake.
KW - Chelating agent
KW - Filter cake
KW - Removal efficiency
KW - Retained permeability
KW - α-amylase
UR - http://www.scopus.com/inward/record.url?scp=84894376175&partnerID=8YFLogxK
U2 - 10.1504/IJOGCT.2014.059277
DO - 10.1504/IJOGCT.2014.059277
M3 - Article
AN - SCOPUS:84894376175
SN - 1753-3309
VL - 7
SP - 169
EP - 188
JO - International Journal of Oil, Gas and Coal Technology
JF - International Journal of Oil, Gas and Coal Technology
IS - 2
ER -