Process for hydrofracturing an underground aquifer from a water well borehole for increasing water flow production from Denver Basin aquifers

A process for hydrofracturing a water-bearing interval or zone in an underground aquifer from a water well borehole with a drill stem suspended therein, the process increasing water flow production from a water well, the process steps comprising:

• using well log data, including geophysical logging of the borehole, for selecting at least one water-bearing interval in the borehole and determining the depth of the interval and the approximate width of the interval, the geophysical logging of the borehole including comparing borehole cuttings with the geophysical logging for selecting the water-bearing interval;
• lowering a hydrofracture tool connected to a bottom of the drill stem, the tool including a pipe section with a plurality of ports therein and a pair of inflatable packers attached to opposite ends of the pipe section, a length of the pipe section approximately the width of the interval;
• inflating the inflatable packers for sealing an area around the pipe section and the borehole next to the pipe section;
• introducing high-pressure water through the drill stem and out the ports in the pipe section for fracturing the surrounding interval;
• introducing gravel proppants into the high-pressure water and forcing the proppants into the fractured interval;
• terminating the high-pressure water and gravel proppants to the interval, deflating the inflatable packers and removing the tool from the borehole;
• and
• completing the water well using well casing and a water screen next to the fractured interval in the borehole.

A process for hydrofracturing water-bearing intervals or zones in an underground aquifer from a water well borehole with a drill stem suspended therein, the process increasing water flow production from a water well, the process steps comprising:

• using well log data for selecting at least two water-bearing intervals in the borehole and determining the depth of the intervals and the approximate width of the intervals, the well log data including geophysical logging of the borehole, the geophysical logging of the borehole including comparing borehole cuttings with the geophysical logging for selecting the water-bearing intervals;
• lowering a hydrofracture tool connected to a bottom of the drill stem to a lowest interval in the borehole, the tool including a pipe section with a plurality of ports disposed around the pipe section and a pair of inflatable packers attached to opposite ends of the pipe section, a length of the pipe section approximately the width of the lowest interval;
• inflating the inflatable packers for sealing an area around the pipe section and the borehole next to the pipe section;
• introducing high-pressure water in a range of 300 to 1000 psi through the drill stem and out the ports in the pipe section for fracturing the surrounding interval;
• introducing gravel proppants slowly into the high-pressure water and forcing the proppants into the fractured lowest interval;
• terminating the high-pressure water and gravel proppants to the interval when the pressure of the high-pressure water increased and the volume of water introduced in the interval decreases,
• deflating the inflatable packers and removing the tool from the borehole;
• and
• completing the water well using well casing and a water screen next to the fractured lowest interval in the borehole.