Shale gas reservoir hydraulic fracturing production increasing method
A hydraulic fracturing and shale gas reservoir technology, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., to improve the effect of hydraulic fracturing and increase the output of a single well
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Well A is a continental shale gas well. The fracturing fluid adopts the resistance-reducing water system. The proppant adopts 100-mesh ceramsite + 40 / 70-mesh ceramsite + trailing 30 / 50-mesh ceramsite. The fracturing method adopts "multi-slug injection". -Temporary plugging-pressure suppression in the seam-induced steering"technology.
 1) The displacement of the pre-fluid joint-making stage is first increased to 6m 3 / min, then the displacement continues to increase to 8m 3 / min
 2) Alternate injection stage of pad fluid and 100-mesh ceramsite slug, initial proppant concentration 60kg / m 3 , when the first-stage 100-mesh ceramsite slug and the pre-displacement fluid pumping ended, the wellhead construction pressure monitoring showed a pressure drop of 3.1MPa, and the displacement rose to 11m 3 / min, the proppant concentration rises to 90kg / m 3 , the proppant concentration rises to 120kg / m after injecting the second-stage pre-displacement fluid 3 , the ...
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