Research Article
Formation Damage due to Drilling and Fracturing Fluids and Its Solution for Tight Naturally Fractured Sandstone Reservoirs
Table 1
Information about core samples used in this study.
| Sample name | Length (cm) | Diameter (cm) | Matrix permeability (mD) | Fracture width (μm) | Fluid damage or treatment tests |
| #1 | 4.70 | 2.47 | 0.0077 | 10 | Fracturing fluid | #2 | 4.53 | 2.47 | 0.0047 | 57 | Fracturing fluid | #3 | 3.92 | 2.46 | 0.0027 | 89 | Fracturing fluid | #4 | 37.5 | 2.46 | 0.0027 | 112 | Fracturing fluid | #5 | 56.8 | 2.48 | 0.0056 | 123 | Fracturing fluid | #6 | 51.9 | 2.45 | 0.0087 | 139 | Fracturing fluid | #7 | 3.75 | 2.46 | 0.0027 | 20 | Drilling fluid + fracturing fluid | #8 | 4.45 | 2.44 | 0.0137 | 53 | Drilling fluid + fracturing fluid | #9 | 4.34 | 2.44 | 0.0137 | 76 | Drilling fluid + fracturing fluid | #10 | 4.27 | 2.46 | 0.0012 | 98 | Drilling fluid + fracturing fluid | #11 | 4.27 | 2.46 | 0.0012 | 116 | Drilling fluid + fracturing fluid | #12 | 4.38 | 2.45 | 0.0910 | 127 | Drilling fluid + fracturing fluid | #13 | 4.30 | 2.45 | 0.0910 | 139 | Drilling fluid + fracturing fluid | #14 | 4.17 | 2.45 | 0.0140 | 42 | Acid treatment | #15 | 4.27 | 2.44 | 0.0010 | 68 | Acid treatment | #16 | 4.18 | 2.47 | 0.0019 | 91 | Acid treatment | #17 | 4.15 | 2.47 | 0.0019 | 103 | Acid treatment | #18 | 4.36 | 2.44 | 0.0010 | 117 | Acid treatment | #19 | 4.40 | 2.44 | 0.0010 | 127 | Acid treatment | #20 | 4.52 | 2.45 | 0.0015 | 139 | Acid treatment | #21 | 4.07 | 2.44 | 0.0045 | 17 | Drilling fluid + acid treatment | #22 | 4.49 | 2.44 | 0.0010 | 53 | Drilling fluid+ acid treatment | #23 | 4.49 | 2.45 | 0.0015 | 75 | Drilling fluid+ acid treatment | #24 | 4.09 | 2.45 | 0.0140 | 97 | Drilling fluid+ acid treatment | #25 | 4.58 | 2.45 | 0.0038 | 115 | Drilling fluid + acid treatment | #26 | 4.55 | 2.45 | 0.0009 | 127 | Drilling fluid+ acid treatment | #27 | 4.59 | 2.45 | 0.0002 | 140 | Drilling fluid+ acid treatment |
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