High-density high-strength pressure crack proppant

Abstract

The invention relates to a high closing pressure extra-deep oil well and an extra-deep gas well, and pressing crack driving adopts high density and high strength pressing crack propping agent. The invention is characterized in that the composition is as follows: 100 parts of non-annealing bauxite with more than or equal to 75 percent of Al2O3, and 3 to 8 parts of MnO2, and 1 to 5 parts of ZrO2, the apparent density after balling is fired is 3.40-3.55 kg / cm <3>, the anti- fragmentation capacity under 86 MP pressure is more than or less than 5 percent (20 / 40 meshes), the main chemical composition is 78 to 85 wt percent of Al2O3, 2 to 5 wt percent of MnO2, 78 to 85 wt percent of Al2O3, 2 to 5 wt percent of MnO2, and 2 to 4 wt percent of ZrO2. The propping agent of the invention has small composition material, simple preparation, low cost and good economical efficiency, the apparent density reaches the density limiting of 3.40 to 3.55 g / cm <3>, the compressive strength is high, the propping agent has 20 / 40 meshes of grain size, the anti-fragmentation capacity is (SY / T5108-2007) 86 MPa which is more than or less that 5 percent, the maximum can reach 100 MPa which is more than and less than 8 percent, the invention can satisfy the pressing crack driving of the high pressure extra-deep oil well and the extra-deep gas well under the formation closing pressure more than and equal to 86 MPa, the formation crack is supported under the high pressure, and the flow conductivity can be greatly improved.

Description

Technical field [0001] The invention relates to an ultra-deep oil well and an ultra-deep gas well with high closure pressure, and fracturing flooding adopts high-density and high-strength fracturing proppant. Background technique [0002] With the continuous deepening of oil and gas wells, the formation pressure is increasing, and the permeability is decreasing. The formation closing pressure is as high as 86Mpa. The low-density and medium-density proppants used in fracturing and flooding processes can no longer adapt to such high formation pressures. . For ultra-deep oil wells and ultra-deep gas wells with stratum closure pressure ≥86Mpa, in order to ensure high conductivity at such high closure pressure, the fracturing proppant must be able to withstand ≥86Mpa compressive strength and apparent density ≥3.40kg / cm 3 . For proppants used in fracturing processes, it is necessary to match the compressive strength with the apparent density. If the apparent density does not meet the r...

AI Technical Summary

Problems solved by technology

[0013] Therefore, there is no solid ceramsite proppant in the existing technology that can meet the formation closure pressure ≥ 86Mpa ultra-deep oil and gas well fracturing flooding production process.

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