Fracturing method for reservoirs based on schistose propping agents and gas wetting reversal agents
A wetting reversal and proppant technology, applied in the field of reservoir fracturing, can solve the problems of decreased conductivity of coalbed methane, poor effect, and reduction of seepage channels, etc., and achieves improved conductivity, increased flow channels, The effect of increasing production
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[0031] Example 1
[0032] This embodiment is hydraulic fracturing of coal seam, such as Figure 4 As shown, the gas wetting reversal agent is added to the prefluid of the water tanker 9, and the flake proppant is mixed with the sand-carrying fluid and prefluid in the pump truck 10 to form a fracturing fluid, and the coal seam is processed through the wellbore 13. Hydraulic fracturing, forming multiple fracturing fractures 12. After determining the target coal seam, the average hydraulic fracturing displacement of CBM vertical well 11 is 8-10m 3 / min, the amount of fracturing fluid is determined according to the scale of the site. The ratio of the prefluid to the sand-carrying fluid is about 1:1. Add 0.1% of the total weight of the fracturing prefluid to the fracturing prefluid According to site conditions, 0.01% sodium lauryl sulfate is added to the prefluid to promote fracturing hydraulic pressure into the soft coal seam and crush coal, and reduce the pump pressure; for example,...
Example Embodiment
[0052] Example 2
[0053] The gas wetting reversal agent is added to the prefluid of the water tanker, and the coal gangue flake proppant is mixed with the sand-carrying fluid and prefluid in the pump truck to form a fracturing fluid and hydraulically fracturing the coal seam through the wellbore. Multiple fractures are formed. After determining the target coal seam, the average hydraulic fracturing displacement of the CBM vertical well is about 8m 3 / min, the amount of fracturing fluid is determined according to the scale of the site. The ratio of the prefluid to the sand-carrying fluid is about 1:1, and 0.01% of the total weight of the fracturing prefluid is added to the fracturing prefluid. According to the site conditions, 1% sodium lauryl sulfate is added to the prefluid to promote the fracturing hydraulic pressure into the soft coal seam and crush the coal, and reduce the pump pressure; for example, the total prefluid is 1000m 3 It is necessary to use about 100kg sodium lau...
Example Embodiment
[0054] Example 3
[0055] The gas wetting reversal agent is added to the prefluid of the water tanker, and the coal gangue flake proppant is mixed with the sand-carrying fluid and prefluid in the pump truck to form a fracturing fluid and hydraulically fracturing the coal seam through the wellbore. Multiple fractures are formed. After determining the target coal seam, the average hydraulic fracturing displacement of the CBM vertical well is about 10m 3 / min, the amount of fracturing fluid is determined according to the scale of the site. The ratio of the prefluid to the sand-carrying fluid is about 1:1. The gas wetting reversal which accounts for 0.0001% of the total weight of the fracturing prefluid is added to the fracturing prefluid According to the site conditions, 10% sodium lauryl sulfate is added to the prefluid to promote the fracturing hydraulic pressure into the soft coal seam and crush the coal, and reduce the pump pressure; for example, the total prefluid is 1000m 3 Yo...
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