2019
DOI: 10.2118/191376-pa
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Wormhole Formation During Acidizing of Calcite-Cemented Fractures in Gas-Bearing Shales

Abstract: A relatively large number of calcite-cemented fractures are present in gas-bearing shale formations. During hydraulic fracturing, some of these fractures will be reactivated and may become important flow paths in the resulting stimulated fracture network. On the other hand, the presence of carbonate lamina on fracture surfaces will have a hindering effect on the transport of shale gas from the matrix toward the wellbore. We investigate numerically the effect of low-pH reactive fluids on such fractures, and sho… Show more

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Cited by 7 publications
(4 citation statements)
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References 75 publications
(131 reference statements)
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“…In Equation 2, (3), and (4), the velocity vector u, pressure p, and the cup-mixing concentration of the acid are deemed as unknowns to be solved for. However, the three equations are not enough to do that, since the values of the other variables are unknown.…”
Section: Improved Dbf Framework and Its Solution Schemementioning
confidence: 99%
See 2 more Smart Citations
“…In Equation 2, (3), and (4), the velocity vector u, pressure p, and the cup-mixing concentration of the acid are deemed as unknowns to be solved for. However, the three equations are not enough to do that, since the values of the other variables are unknown.…”
Section: Improved Dbf Framework and Its Solution Schemementioning
confidence: 99%
“…The gravity effect is ignored. The grid has 20 3 cubes. The simulation results of stable flows are shown in Figure 8 and Figure 9, respectively.…”
Section: D Shear-driven Cavity Flowsmentioning
confidence: 99%
See 1 more Smart Citation
“…Both kinds of acidization attempt to enlarge the voids in reservoirs and ease the outflow of hydrocarbons from the subsurface matrix. Many previously published papers [1][2][3] have studied fracture acidization, but this work pays more attention to matrix acidization.…”
Section: Introductionmentioning
confidence: 99%