Enhancing acid fracture conductivity
AssigneeSaudi Arabian Oil Company
InventorsAslan Bulekbay, Ahmed M. Gomaa
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Abstract
Methods and systems for enhancing acid fracture conductivity of acid fracture treatments on subterranean formations are provided. An example method of acid fracture treatment includes initiating fracturing of a subterranean formation in which a wellbore is formed to create a formation fracture, after initiating the fracturing for a period of time, injecting an acidic fluid into the wellbore to etch walls of the formation fracture to thereby create fracture conductivity, introducing a gas into the wellbore to foam fluids in the wellbore, and increasing a foam quality of the fluids with time during the treatment. The foam quality is based on a volume of the introduced gas and a total volume of the fluids in the wellbore.
Claims21
A method of acid fracture treatment, comprising:
- initiating fracturing of a subterranean formation in which a wellbore is formed to create a formation fracture;
- after initiating the fracturing for a period of time, injecting an acidic fluid into the wellbore to etch walls of the formation fracture to thereby create fracture conductivity;
- introducing a gas into the wellbore to foam fluids in the wellbore;
- calculating a foam quality of the fluids based on a volume of the introduced gas and a volume of the fluids in the wellbore;
- correcting the calculated foam quality with at least one of a calculated wellhead foam quality, a predicted bottomhole foam quality, or a calculated actual bottomhole foam quality;
- increasing the foam quality of the fluids with time during the treatment;
- and
- cleaning the wellbore after closure of the formation fracture by flowing a flushing fluid through the wellbore.
Dependencies are inferred from the claim text.