Acid injection fracturing method
A technology of acid injection and fracturing, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the uncertainty of reservoir natural fracture characteristics, rapid production decline, and small increase in fracture net pressure, etc. question
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[0110] Example
[0111] Well A is an evaluation well located in the Longfengshan block of Sinopec. The target interval is 3250.7-3261.5m, 10.8m / layer; the lithology of the target interval is gray gravel-bearing fine sandstone, and the core porosity is 4.2%-12.9% , the average porosity is 9.73%, the permeability is 0.1mD~8.85mD, and the average permeability is 3.73mD. It is a low-porosity and ultra-low permeability reservoir; the pressure coefficient of the target layer is 1.0, and the formation temperature is 120℃. According to the interpretation of the stress profile, the average minimum principal stress of the target layer of this well is 44.1MPa, the average value of the minimum principal stress of the upper interlayer of the target layer is 47.5MPa, and the average minimum principal stress of the lower interlayer is 49.7MPa.
[0112] In order to evaluate the gas-bearing property and productivity of the target sand group, and to carry out the next exploration and evaluation...
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