Methods and compositions for volcanic ash lost circulation materials
AssigneeSaudi Arabian Oil Company
InventorsKhawlah Alanqari, Abdullah Al-Yami
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Abstract
Materials may be used for mitigation of lost circulation in a subterranean formation. Example methods of lost circulation mitigation may include: introducing a lost circulation material to a zone of interest in a subterranean formation via a wellbore, the zone of interest including depleted zones, zones of low pressure, lost circulation zones, fractured zones, or any combination thereof; wherein the lost circulation material includes: volcanic ash, an activator, and a resinous composition; and solidifying, at least partially, the lost circulation material such that the solidified material at least partially blocks the wellbore from the zone of interest.
Claims19
A method comprising:
- introducing a lost circulation material to a zone of interest in a subterranean formation via a wellbore, the zone of interest comprising depleted zones, zones of low pressure, lost circulation zones, fractured zones, or any combination thereof;
- wherein the lost circulation material comprises:
- volcanic ash,
- an activator, wherein the activator comprises sodium silicate, sodium hydroxide, or any combination thereof, and
- a resinous composition, and
- solidifying, at least partially, the lost circulation material such that the solidified lost circulation material at least partially blocks the wellbore from the zone of interest,
- wherein solidifying the lost circulation material comprises forming sodium aluminosilicate hydrate by a polycondensation reaction between the volcanic ash and the activator, followed by curing the resinous composition.
Dependencies are inferred from the claim text.