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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 reducing manufacturing costs

Inactive Publication Date: 2011-04-06
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, use 35%wt of white mud, 50%wt of kaolin and 15%wt of feldspar as raw materials for uniform mixing, then add 4% of the total weight of the above three raw materials of silica sol, through wet ball milling for 40 hours , After ultra-fine grinding, the particle fineness reaches 0.5-1μm, and then spray-dried, and then rolled in the granulator, dried and finalized, and then 20-40 mesh sieved, and then the proppant particles obtained after sieving It is fired at a high temperature of 1100-1300°C for 2-4 hours.

[0012] The petroleum proppant that present embodiment 1 makes is through sampling detection, and performance index is:

[0013] Apparent density: 2.45mg / cm3

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

Embodiment 2

[0015] Example 2, after using 50%wt of white mud, 38%wt of kaolin and 12%wt of feldspar as raw materials to mix evenly, then add 2% of the total weight of the above three raw materials of aluminum phosphate gel, through wet ball milling After 40 hours, the fineness of the particles reaches 0.5-1μm after ultra-fine grinding, then spray drying, and then roll forming in the granulator, drying and setting, and then 40-70 mesh sieving, and then the support obtained after sieving The agent particles are fired at a high temperature of 1100-1300°C for 2-4 hours. The petroleum proppant that present embodiment 2 makes is through sampling detection, and performance index is:

[0016] Apparent density: 2.33mg / cm3

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

Embodiment 3

[0018] Example 3, after using 40%wt of Nankeng white mud, 40%wt of Yichun kaolin and 20%wt of high andandesite as raw materials to mix uniformly, then add 3% of the total weight of the above three raw materials. After 40 hours of ball milling, the fineness of the particles after ultra-fine grinding reaches 0.5-1μm, and then spray drying, and then roll forming in the granulator, drying and setting, and then 30-50 mesh sieving, and then sieving to obtain The proppant particles are fired at a high temperature of 1100-1300°C for 2-4 hours. The petroleum proppant that present embodiment 3 makes is through sampling detection, and performance index is:

[0019] Apparent density: 2.05mg / cm3

[0020] Breakage 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 suppression, in particular to an ultra-low-density and high-strength petroleum proppant which can greatly increase the production increase in oil field production. Background technique [0002] As we all know, hydraulic fracturing technology is the main technical measure for increasing oil production. If the hydraulic fracturing effect is good, the oil production will increase, but there are many factors that affect the hydraulic fracturing effect. Petroleum proppant and fracturing fluid are indispensable engineering materials in the hydraulic fracturing construction of oil and gas field exploitation. At the same time, the type of fracturing fluid and the selection of proppant are also the main factors affecting the fracturing effect. The apparent density, strength and fracture rate of the proppant are the main performance indicators that the proppant affects the fracturing effect. At present...

Claims

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Application Information

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Patent Type & Authority Applications(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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