Recyclable fracturing fluid used for fracturing construction of sandstone gas reservoir
A fracturing fluid and sandstone gas technology, which is applied in the field of recyclable fracturing fluid, can solve the problems of affecting the stimulation effect, high fracturing operation cost, and high residue in the system, so as to achieve good sand-carrying ability and reduce construction operation cost , Facilitate the effect of viscosity adjustment
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Embodiment 1
[0021] A recyclable fracturing fluid used for fracturing construction in sandstone gas reservoirs, the primary fracturing fluid consists of the following components by weight percentage:
[0022] Thickener 1%,
[0024] The balance is water.
[0025] In this embodiment, the viscosity of the primary fracturing fluid is at least 90 mPa·s when the ground temperature is normal, and the viscosity decreases rapidly when the formation temperature is greater than 60°C, and the viscosity is ≤10mPa·s at 100°C.
[0026] In this embodiment, after the flowback of the fracturing fluid, the flowback fluid is treated on the ground to form a secondary fracturing fluid. The secondary fracturing fluid includes a thickener for adjusting the viscosity of the liquid. The viscosity of the secondary fracturing fluid is At least 90mPa·s.
[0027] In this embodiment, the flowback fluid enters the fluid storage tank after desanding on the ground and gas-liquid separatio...
Embodiment 2
[0030] A recyclable fracturing fluid used for fracturing construction in sandstone gas reservoirs, the primary fracturing fluid consists of the following components by weight percentage:
[0031] Thickener 5%,
[0033] The balance is water.
[0034] In this embodiment, the viscosity of the primary fracturing fluid is at least 90 mPa·s when the ground temperature is normal, and the viscosity decreases rapidly when the formation temperature is greater than 60°C, and the viscosity is ≤10mPa·s at 100°C.
[0035] In this embodiment, after the flowback of the fracturing fluid, the flowback fluid is treated on the ground to form a secondary fracturing fluid. The secondary fracturing fluid includes a thickener for adjusting the viscosity of the liquid. The viscosity of the secondary fracturing fluid is At least 90mPa·s.
[0036] In this embodiment, the flowback fluid enters the fluid storage tank after desanding on the ground and gas-liquid separatio...
Embodiment 3
[0039] A recyclable fracturing fluid used for fracturing construction in sandstone gas reservoirs, the primary fracturing fluid consists of the following components by weight percentage:
[0040] Thickener 2%,
[0041] Potassium chloride 2%,
[0042] The balance is water.
[0043] In this embodiment, the viscosity of the primary fracturing fluid is at least 90 mPa·s when the ground temperature is normal, and the viscosity decreases rapidly when the formation temperature is greater than 60°C, and the viscosity is ≤10mPa·s at 100°C.
[0044] In this embodiment, after the flowback of the fracturing fluid, the flowback fluid is treated on the ground to form a secondary fracturing fluid. The secondary fracturing fluid includes a thickener for adjusting the viscosity of the liquid. The viscosity of the secondary fracturing fluid is At least 90mPa·s.
[0045] In this embodiment, the flowback fluid enters the fluid storage tank after desanding on the ground and gas-liquid separatio...
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