Processes for injection of fluids into a wellbore

A process comprising:

• positioning a downhole apparatus on a drill pipe;
• placing the downhole apparatus at a desired station depth within a wellbore;
• attaching a cable to the downhole apparatus from an up-hole environment;
• performing a first geological stratum test at the desired station depth;
• setting a dual packer to seal a space between at least a portion of the downhole apparatus and an inner surface of the wellbore;
• introducing a fluid to the downhole apparatus through the drill pipe, wherein the fluid includes both a drill fluid and one of a fresh water volume and a brine volume, the one of the fresh water volume and the brine volume in a pill;
• circulating at least a portion of the fresh water volume and the brine volume through a first line from a circulating sub to a bottom outlet;
• creating a suction in a dual packer interval from an upper inlet into a secondary flowline;
• replacing at least a portion of fluid from the dual packer interval with the portion of the fresh water volume and the brine volume;
• taking fluid from the dual packer interval;
• determining whether the fluid taken from the dual packer interval is clean;
• in response to a determination that the fluid taken from the dual packer interval is clean, operating a pump powered by an onboard power module to inject at least a portion of the fluid from the downhole apparatus into a geological stratum at the desired station depth, the onboard power module being included in the downhole apparatus and in electrical communication with the cable;
• performing a second geological stratum test at the desired station depth;
• and
• determining a change from the first geological stratum test to the second geological stratum test.

A process comprising:

• placing a downhole apparatus at a desired station depth within a wellbore;
• attaching a cable to the downhole apparatus from an up-hole environment;
• performing a first geological stratum test at the desired station depth;
• setting a dual packer to seal a space between at least a portion of the downhole apparatus and an inner surface of the wellbore;
• introducing a fluid to the downhole apparatus through a drill pipe, wherein the fluid includes both a drill fluid and one of a fresh water volume and a brine volume, the one of the fresh water volume and the brine volume in a pill;
• circulating at least a portion of the fresh water volume and the brine volume through a first line from a circulating sub to a bottom outlet;
• creating a suction in a dual packer interval from an upper inlet into a secondary flowline;
• replacing at least a portion of fluid from the dual packer interval with the portion of the fresh water volume and the brine volume;
• taking fluid from the dual packer interval;
• determining whether the fluid taken from the dual packer interval is clean;
• in response to a determination that the fluid taken from the dual packer interval is clean, operating a pump powered by an onboard power module to inject at least a portion of the fluid from the downhole apparatus into a geological stratum at the desired station depth, the onboard power module being included in the downhole apparatus and in electrical communication with the cable;
• performing a second geological stratum test at the desired station depth during presence of the pill at a site of the stratum test;
• and
• determining a change from the first geological stratum test to the second geological stratum test.