A method for preparing an artificial core and an artificial core prepared by the method
A technology for artificial cores and cores, applied in the field of petroleum exploration, can solve the problems of influence and support and decrease of the overall strength of the cores, so as to reduce the interference factors, facilitate the influence mechanism, and overcome the insufficient strength of the cores.
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[0028] The invention provides a kind of preparation method of artificial rock core, comprises the steps:
[0029] (1) Prepare the adhesive.
[0030] In a specific embodiment, cement slurry is used as the adhesive. Specifically, water and cement are mixed, fully stirred evenly, and a cement slurry with a water content of 30-35wt% (preferably 32-35wt%) is prepared. The cement slurry with a moisture content of 30-35wt%, especially the cement slurry with a moisture content of 32-35wt%, can be thoroughly wetted to ensure normal curing, while ensuring that the cement slurry cannot flow or has poor fluidity to prevent excessive Water affects decomposable materials.
[0031] (2) Prepare a decomposable material wrapped with an oil-soluble viscous liquid film.
[0032] Mix the decomposable material with the oil-soluble viscous liquid, and stir well so that the surface of the decomposable material is covered with the oil-soluble viscous liquid. The amount of oil-soluble viscous liqui...
Embodiment 1
[0049] (1) Mix water and cement (general-purpose cement), fully stir evenly, make the cement slurry that water content is 35wt%, get 60 grams for subsequent use.
[0050] (2) 30 grams of ammonium carbonate are mixed with excess liquid paraffin, fully stirred, ammonium carbonate surface is covered by liquid paraffin, remove unnecessary liquid paraffin by decompression suction filtration, thereby obtain the ammonium carbonate that has wrapped liquid paraffin.
[0051] (3) 60 grams of cement slurry of step (2) is mixed with the ammonium carbonate wrapped in liquid paraffin of step (2), and stirred quickly for 2 minutes at a speed of 200rpm, so that the ammonium carbonate wrapped in liquid paraffin is uniformly distributed in the cement slurry , a mixture of the two is obtained.
[0052](4) Add the above mixture into the mold, control the pressure environment to 10MPa, continue for 24 hours, and take out the prepared rock core to be decomposed from the mold.
[0053] (5) The core...
Embodiment 2
[0055] (1) Mix water and cement, fully stir evenly, make the cement slurry that water content is 30wt%, get 75 grams for subsequent use.
[0056] (2) 20 grams of ammonium bicarbonate are mixed with excess pitch, fully stirred, the ammonium bicarbonate surface is covered by pitch, and excess pitch is removed by decompression suction filtration, thereby obtaining ammonium bicarbonate wrapped in pitch.
[0057] (3) 75 grams of cement slurry of step (2) is mixed with the ammonium bicarbonate wrapped in asphalt of step (2), and stirred quickly for 1 minute at a speed of 400rpm, so that the ammonium bicarbonate wrapped in asphalt is evenly distributed in the cement slurry , a mixture of the two is obtained.
[0058] (4) Add the above mixture into the mold, control the pressure environment to 15MPa, continue for 24 hours, and take out the prepared rock core to be decomposed from the mold.
[0059] (5) The core to be decomposed was placed in an environment of 100° C. for 1 hour, and ...
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