Solid propping agent and its preparation method

A proppant and solid technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of high apparent density of proppant, high cost of use, large amount of volumetric fractures, etc., and achieve product quality and stability Good performance, high degree of automation and productivity, and less fracture volume

Inactive Publication Date: 2002-09-04
宜兴东方石油支撑剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the above-mentioned proppant is: the prepared proppant has a high apparent density, which not only affects the carrying capacity of the fracturing fluid, but also requires a large volume of fractures, and the use cost is relatively high; Bricks are fired, then put into electric arc furnace to melt and blow balls after cooling, the energy consumption is high, and the ball formation is uncontrollable, the yield of products that meet the requirements is low, and proppant that does not meet the requirements is not suitable for reuse, wasting raw materials
The obtained proppant is based on α-Al 2 o 3 The microcrystalline structure of corundum is the main crystal phase, and the apparent density is still high at 3.4g/cm 3 , the semi-dry method produces high turbidity, which affects th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: take cooked bauxite 48%, kaolin 28%, red mud (produced in Yixing) 20%, Fe 2 O 3 4%, titanium dioxide 0.5%. Pulverize each raw material to 300 mesh fine powder, mix the mixture evenly, add enough water to form a ball, mix it into moist soil, put it into the water chestnut forming ball machine after granulation, rotate it into a ball, sieve and sort to obtain granules The particles with a diameter of 0.5-1mm are sent to the rotary kiln for sintering at 1230 ° C for 1.5 hours, and then cooled, sorted, dust-removed and packed out of the kiln.

example 2

[0013] Example 2: Take cooked bauxite 55%, kaolin 20%, red mud 22%, Fe 2 O 3 3%, titanium dioxide 1.5%. The pellets were prepared by the aforementioned method and sent to a rotary kiln for sintering at 1250°C for 1.5 hours.

example 3

[0014] Example 3: Take cooked bauxite 52%, kaolin 18%, red mud 30%, titanium dioxide raw ore 2%, and titanium dioxide 0.7%. The pellets were prepared by the aforementioned method and sent to a rotary kiln for sintering at 1240°C for 1.5 hours.

[0015] After the above-mentioned embodiment is fired, the product contains Al 2 O 3 48-55%, Fe 2 O 3 3.5-5.5%, SiO 2 29-35%, TiO 2 1.5-5%, population fragmentation rate (tested by SY / T5108-1997) 3 , the apparent density is 2.65-2.85 g / cm 3 , compressive strength 52Mpa≤7%, flow conductivity 60Mpa≥35μm 2 -cm, turbidity < 20 degrees.

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Abstract

The present invention relates to an improvement on solid supporting agent for deep-seated oil ang gas well fracture process, and is characterized by that it adopts kaoline and red mud as clay material, and increases its dose, so that on the premise of ensuring strength it can obviously reduce the apparent density of product, it not only is favorable for carrying construction of fracturing fluid, but also its volume dose is small, and can reduce use cost. Said ivnention adopts rotary kiln rolling dynamic firing process, its product can be uniformly fried, and its fried time is short.

Description

technical field [0001] The invention relates to a solid proppant for deep oil and gas well fracturing process and a preparation method. Background technique [0002] The fracturing process is widely used to develop deep oil and gas wells to increase production. In order to ensure the opening of deep underground fractures, suitable proppant is necessary, which can enhance the formation conductivity and increase the production of oil or gas, which is an important key to the application of fracturing technology. Because of its high strength and moderate density, sintered ceramsite is the preferred fracture proppant and has always been highly valued. Chinese Patent No. 89102544 discloses a kind of bauxite-poor vanadium containing 65-75% alumina or bauxite scraps as the main raw material, with soft clay and quartz as auxiliary raw materials, mixed at 100:15:10, using electrofusion The solid proppant is prepared by blowing method, and the obtained solid proppant is mainly compos...

Claims

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Application Information

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IPC IPC(8): E21B43/267
Inventor 许宏初包小林范龙俊
Owner 宜兴东方石油支撑剂有限公司
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