Method to use lost circulation material composition comprising alkaline nanoparticle based dispersion and sodium bicarbonate in downhole conditions
AssigneeSaudi Arabian Oil Company
InventorsVikrant Wagle, Rajendra Arunkumar Kalgaonkar, Abdullah Al-Yami, Sara Alkhalaf
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Abstract
Provided is a lost circulation material that may consist essentially of an alkaline nanosilica dispersion and a sodium bicarbonate activator. Further provided are methods that may control lost circulation in a lost circulation zone in a wellbore by introducing the lost circulation material such that it contacts the lost circulation zone and forms a gelled solid in the lost circulation zone.
Claims16
A lost circulation material, consisting essentially of:
- a lost circulation material gel that is (a) and (b) in combination, where
- (a) is an alkaline nanosilica dispersion,
- wherein the alkaline nanosilica dispersion comprises 30-50 wt % of alkaline silica nanoparticles, and
- (b) is a sodium bicarbonate activator,
- wherein the sodium bicarbonate activator is present in an amount in a range of 19 wt % to 40 wt % of the lost circulation material.
A method of controlling lost circulation in a lost circulation zone in a wellbore, comprising:
- introducing a lost circulation material consisting essentially of an alkaline nanosilica dispersion and a sodium bicarbonate activator into the wellbore such that they contact the lost circulation zone,
- wherein the alkaline nanosilica dispersion comprises 30-50 wt % of alkaline silica nanoparticles,
- wherein the sodium bicarbonate activator is present in an amount in a range of 19 wt % to 40 wt % of the lost circulation material,
- wherein the alkaline nanosilica dispersion and the sodium bicarbonate activator are not premixed, and
- forming a gelled solid from the lost circulation material in the lost circulation zone.
A method of controlling lost circulation in a lost circulation zone in a wellbore, comprising:
- introducing a lost circulation material consisting essentially of an alkaline nanosilica dispersion and a sodium bicarbonate activator into the wellbore such that they contact the lost circulation zone,
- wherein the alkaline nanosilica dispersion comprises 30-50 wt % of alkaline silica nanoparticles,
- wherein the sodium bicarbonate activator is present in an amount in a range of 19 wt % to 40 wt % of the lost circulation material, and
- forming a gelled solid from the lost circulation material in the lost circulation zone.
Dependencies are inferred from the claim text.