Wellbore methods employing precipitated particles

A method comprising:

• selecting precipitation conditions for producing precipitated particles that are non-spherical in shape and are between about 1 micron and about 100 microns in size;
• forming the precipitated particles from a reaction mixture under the precipitation conditions without using a polymeric dispersant;
• and
• introducing a wellbore circulation fluid comprising a plurality of the precipitated particles into a wellbore penetrating a subterranean formation;
• wherein the precipitation conditions comprise applying an electric field to the reaction mixture and modulating one or more of voltage, amperage, frequency, or temperature,
• wherein the electric potential of the applied electric field is selected to control the shape of the precipitated particles to decrease particle sag of the wellbore circulation fluid,
• wherein the non-spherical shape is selected from the group consisting of ovular-shaped, discus-shaped, platelet-shaped, flake-shaped, snowflake-shaped, toroidal-shaped, dendritic-shaped, needle-shaped, acicular-shaped, rod-shaped, prismatic-shaped, or spiked variants of any of these shapes, and
• wherein a d90 particle size of the precipitated particles is greater than or equal to 1.5× a median particle size of the precipitated particles and less than or equal to 4× the median particle size of the precipitated particles.

A method comprising:

• forming precipitated particles while applying an electric field to a reaction mixture during a precipitation reaction, such that the precipitated particles are non-spherical in shape and are between about 1 micron and about 100 microns in size;
• and
• introducing a wellbore circulation fluid comprising a plurality of the precipitated particles into a wellbore penetrating a subterranean formation,
• wherein the electric potential of the applied electric field is selected to control the shape of the precipitated particles to decrease particle sag of the wellbore circulation fluid,
• wherein the non-spherical shape is selected from the group consisting of ovular-shaped, discus-shaped, platelet-shaped, flake-shaped, snowflake-shaped, toroidal-shaped, dendritic-shaped, needle-shaped, acicular-shaped, rod-shaped, prismatic-shaped, or spiked variants of any of these shapes, and
• wherein a d90 particle size of the precipitated particles is greater than or equal to 1.5× a median particle size of the precipitated particles and less than or equal to 4× the median particle size of the precipitated particles.

A method comprising:

• forming precipitated particles from a reaction mixture in the presence of a carbohydrate-based material, such that the precipitated particles are non-spherical in shape and are between about 1 micron and about 100 microns in size;
• and
• introducing a wellbore circulation fluid comprising a plurality of the precipitated particles into a wellbore penetrating a subterranean formation,
• wherein the carbohydrate-based material is selected to control the shape of the precipitated particles to decrease particle sag of the wellbore circulation fluid,
• wherein the non-spherical shape is shape selected from the group consisting of ovular-shaped, discus-shaped, platelet-shaped, flake-shaped, snowflake-shaped, toroidal-shaped, dendritic-shaped, needle-shaped, acicular-shaped, rod-shaped, prismatic-shaped, or spiked variants of any of these shapes, and
• wherein a d90 particle size of the precipitated particles is greater than or equal to 1.5× a median particle size of the precipitated particles and less than or equal to 4× the median particle size of the precipitated particles.