Supporting agent, preparation method and application thereof
A technology of proppant and body, which is applied in the field of oil and gas field exploration and development, can solve the problems of adding fiber adding operation links and equipment, the improvement of proppant sinking condition is not obvious, and the input cost is high, so as to improve the sand laying profile and improve the storage capacity. The degree of vertical production of layers and the effect of increasing single well production
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[0028] A preparation method of a proppant, comprising the following steps:
[0029] Step 1: sintering bauxite to obtain a number of proppant particle bodies with a particle diameter of 0.425-0.85 mm;
[0030] Step 2: Electroplate a layer of metal shell with a thickness of 0.1-0.15 mm on each proppant particle body in step 1, and then adopt the induction electrification method to charge the surface of the proppant particle with the same sex to obtain the proppant.
[0031] The proppant of the present invention is used to improve the sand paving profile of hydraulic fracturing fractures, and the proppant is filled into the hydraulic fracturing fractures by means of slug injection. Among them: the concentration of proppant slugs changes stepwise from low to high with 80 kg / m3 as the step, the proppant concentration of the first slug is 80 kg / m3, and that of each subsequent slug is 160 kg / cubic meter, 240 kg / cubic meter, 320 kg / cubic meter...increase in turn, the highest not exce...
Embodiment
[0033] see figure 1 , the fractured wellbore 1 used in this embodiment is a vertical well; the fractured oil layer 2 is an ultra-low permeability oil layer with a thickness of 25 meters, a permeability of 0.6 mD, and a porosity of 11.2%; 4 The length is 6 meters, and the hole density is 16 holes / meter. Equipped with 1 set of fracturing unit, 45 cubic meters of new proppant with the same charge on the surface, and 560 cubic meters of guar gum fracturing fluid. The pump injection displacement is set at 2.5 cubic meters per minute. After injecting 30 cubic meters of pre-fluid, the sand-carrying liquid is pumped. The proppant particles are injected in a slug manner. The initial proppant concentration is 80 kg / m3. The proppant concentration of each slug is 160 kg / m3, 240 kg / m3, 320 kg / m3...increase in turn, the highest is 1200 kg / m3, and the interval between every two slugs is 10 minutes, The proppant dose for each slug is 3 cubic meters. In the sand-carrying liquid stage, a tot...
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