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Petroleum propping agent with ultra-low density and high strength

A high-strength, proppant technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of unfavorable oil production increase and reduce the effect of hydraulic fracturing, etc., to achieve oil production increase, high strength, The effect of low breakage

Inactive Publication Date: 2013-01-02
徐益民 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ceramsite proppant is mainly prepared by using bauxite as the main raw material by electrolysis or sintering method, but the apparent density of ceramsite proppant is above 2.7mg / cm3, and its strength (compression resistance) is under 52MPa hydraulic pressure. Its fragmentation rate is greater than 10%, which cannot fully meet the technical requirements of the fracturing proppant to quickly fill the fracturing fracture and firmly support the fracture surface, causing the fracturing fractures to sometimes reclose under the gravity of the upper rock in the deep oil layer of the formation , thus reducing the effect of hydraulic fracturing, which is not conducive to increasing oil production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: After mixing 35% wt white mud, 50% wt kaolin and 15% wt feldspar as raw materials, add 4% silica sol of the total weight of the above three raw materials, and perform wet ball milling for 40 hours , After ultra-fine grinding, the particle size reaches 0.5-1μm, and then spray drying, then roll forming in the granulator, drying and setting, and then sieving with 20-40 mesh, and then sieving the proppant particles obtained It is fired at a high temperature of 1100-1300℃ for 2-4 hours.

[0012] The petroleum proppant prepared in Example 1 has been sampled and tested, and its performance indicators are:

[0013] Apparent density: 2.45mg / cm3

[0014] Broken rate (under 52MPa water pressure): 7.1%

Embodiment 2

[0015] In Example 2, 50%wt white clay, 38%wt kaolin and 12%wt feldspar were used as raw materials to be uniformly mixed, and then 2% aluminum phosphate gel of the total weight of the above three raw materials was added, and then wet ball milling After 40 hours, ultrafine grinding, the particle size reaches 0.5-1μm, and then spray drying, and then roll forming in the granulator, drying and setting, then 40-70 mesh sieving, and then the support obtained after sieving The agent particles are fired at a high temperature of 1100-1300℃ for 2-4 hours. The petroleum proppant prepared in Example 2 has been sampled and tested, and its performance indicators are:

[0016] Apparent density: 2.33mg / cm3

[0017] Broken rate (under 52MPa water pressure): 6.2%

Embodiment 3

[0018] In Example 3, 40%wt of Nankeng white mud, 40%wt of Yichun kaolin and 20%wt of high andelite were used as raw materials to be uniformly mixed, and then 3% aluminum sol of the total weight of the above three raw materials was added. Method ball milling for 40 hours, after ultra-fine grinding, the particle size reaches 0.5-1μm, and then spray drying, then roll forming in the granulator, drying and setting, then sieving with 30-50 mesh, and then sieving to obtain The proppant particles are fired at a high temperature of 1100-1300℃ for 2-4 hours. The petroleum proppant prepared in Example 3 has been sampled and tested, and its performance indicators are:

[0019] Apparent density: 2.05mg / cm3

[0020] Broken rate (under 52MPa water pressure): 5.6%

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Abstract

The invention discloses a petroleum propping agent with ultra-low density and high strength. The petroleum propping agent is prepared by uniformly mixing 30 to 50 weight percent of white mud, 30 to 50 weight percent of kaolin and 10 to 20 weight percent of feldspar serving as raw materials, adding a reinforcing agent such as aluminum sol, silicon sol or aluminum phosphate sol and the like in an amount which is 2 to 5 percent of the total weight of the three raw materials and performing wet ball milling, superfine grinding, spray drying, rolling forming, drying, screening and high-temperature sintering. The petroleum propping agent with ultra-low density and high strength has the characteristics of ultra-low apparent density, high strength and low crushing rate, so the propping agent has good flow conductivity, can quickly fill fractures in hydraulic fracturing, effectively props the fractures all the time after the hydraulic fracturing is finished, prevents reclosing of the fractures,enables the stratum fluid to enter the fractures in a linear mode, improves the hydraulic fracturing effect, and is favorable for petroleum yield increment. Meanwhile, the local resources can be fully utilized as raw materials for preparation so as to reduce the manufacturing cost of the propping agent.

Description

Technical field [0001] The invention relates to a fracturing proppant for oil well killing, in particular to an ultra-low-density high-strength petroleum proppant that can greatly increase oilfield production and increase production. Background technique [0002] As we all know, hydraulic fracturing technology is the main technical measure to increase oil production. If the hydraulic fracturing effect is good, the oil production increase will increase, and there are many factors that affect the effect of hydraulic fracturing. Petroleum proppants and fracturing fluids are indispensable engineering materials for hydraulic fracturing in oil and gas field exploitation. At the same time, the type of fracturing fluid and the choice of proppants are also the main factors that affect the fracturing effect. The apparent density, strength and fracture rate of proppants are the main performance indicators that proppants affect the fracturing effect. At present, there are many types of prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
Inventor 徐益民张明俊金宙永徐小勇
Owner 徐益民
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