Experiments oil fracturing proppant

According to the new city Jinbi Refractories Co. http://www.jinbinaicai.com understand,
Proppant conductivity experiments on long-term precision equipment and laboratory staff require a higher level of technology, such as proppant testing Langfang Branch Laboratory in 1995 first in the country to carry out development work flow API linear conductivity proppant long-term experimental device On the basis of preliminary experiments in 2005 Langfang Branch continued transformation of the original equipment in automatic load control, test liquid provision of micro-pressure measurement system has been a major adjustment, based on the use of domestic equipment existing conditions, reduce instrument manufacturing costs, saving a lot of foreign exchange. The manufacturing cost of self-developed test system is only about 1/8 of the import system.
The system is tested by the long-term diversion capacity of medium density ceramic ultra lightweight proppant achieved satisfactory results prove the long-term domestic proppant conductivity test equipment complies with the test requirements because of the zero displacement issues handled properly, domestic long proppant suppliers Test results diversion capacity of the equipment has successfully developed a higher long-term credibility of domestic diversion capacity of the equipment for our further investment in low permeability oil and gas field development an important issue, the old oilfields refracturing provide strong technical support.

Concerning oil proppant

Oil fracturing high crush proppants (ceramic sand) is a ceramic granular product with high fracture strength, mainly for the oil well supported, to increase production of oil and natural gas, an environmentally friendly product. 

This product is the use of high-quality bauxite, coal and other raw materials, sintered ceramic, is a substitute for natural quartz sand, glass beads, metal balls and other low-strength fracturing proppant, to increase production of oil and gas has a positive effect. 

When oil and gas exploration in deep, high pressure low permeability Deposits closed after fracturing treatment, the rock cracked hydrocarbon, oil and gas from the channel formed by the collection out of the cracks. Along with a high-pressure high-alumina support material solution into the formation filling in cracks in the rock, do not play a supporting crack closure due to stress release effect, thereby maintaining high conductivity, so that oil and gas flow, increase production. Practice has proved that the use of high-alumina proppant fracturing wells can increase production by 30-50%, but also to extend the service life of oil and gas wells, a key material in the oil and gas wells in low permeability oil and gas exploration and construction. Products used in deep fracturing, it will be filled to the low permeability fractured rock deposits in high closed fracture treatment, the hydrocarbon rock split, play a supporting fissures not because of stress release and closed, thereby maintaining the oil and gas high flow capacity, not only to increase oil and gas production, and can extend the service life of oil and gas wells.

Production of ceramic proppant should note the following seven elements

In this paper, the main raw material level bauxite, dolomite, boric acid, bentonite, precipitated barium sulfate as a secondary raw material to manufacture Ceramic proppants, investigated the effect of addition of various raw materials for proppant performance. The results show that the ratio of raw materials through the rational design of improved granulation process and select the appropriate firing temperature can develop excellent performance ceramic proppant. After industrial production practice, confirmed that the design of the production process is feasible. Study the following conclusions:
(1) According to the Al203-Si02 binary phase diagram, select the level of bauxite-based raw material, adding a certain amount of auxiliary materials can produce excellent performance of ceramic proppant, the process parameters are affordable range of company equipment within;
(2) silica powder because small particles can be effectively filled in the gaps between the bauxite and other fines, in the firing process, due to their activity, is conducive to reduce the sintering temperature, while an appropriate amount of silicon powder also help to improve performance;
(3) is introduced in the form of barium sulfate, barium oxide, barium carbonate and the effect of the introduction of barium oxide can be increased as the strength of the proppant. When the amount of barium sulfate 超过 5 lnj weak s%, the intensity decreases sharply, so the amount should not exceed 5 m weak s%;
(4) Add 2 mass% of dolomite, can effectively reduce the acid solubility, but also can reduce the sintering temperature, play to save energy, reduce the cost of action. Bentonite is introduced to increase the strength of semi-finished products, reducing the ash off phenomenon during storage and transportation process, you can drop ring formation is only the chance to improve the pass rate;
(5) By comparing the various methods on Oil fracturing proppant granulation performance, designed a new granulation process. First, the new technology is the traditional spray drying equipment to do the following improvements:
I) will be expanded to the hole diameter piece 2.5-2,8 mm:
II) The non-porous flat plate to 2.8-3.0 mm perforated cover:
The improved slurry discharged after reducing the shear rate to give a smaller spray angle and increase the droplet diameter, to obtain a better particle. By controlling the water content in the slurry, while optimizing the spray drying parameters, can greatly improve the appearance and quality of the particles, not only a uniform particle size, but also eliminates the center due to the rapid evaporation of water vapor generated enormous pressure to form a fracture surface of the particles cavity; good sphericity particles, greater density (1.2-1.3g, cI113). But still relatively rough surface of the particles, but also close enough, on this basis, select the sugar coating machine treatment processes and achieved good results;
(6) the density and particle size of the raw material have a certain impact on the performance of the proppant, especially some larger particle size effects. Raw material particle size of 0.004 mm obtained proppant strength higher than the particle size of 0,01 mm of 80--90%, the particle the higher the density the greater the strength;
(7) the firing control Proppants for hydraulic fracturing an important part of the final performance, in order to prevent burning and burnt due to the occurrence, the firing temperature must be strictly controlled. In this study, the ratio of the material, the optimum firing temperature of 1360 ± 5 ℃, so that one can guarantee the quality of products, on the other hand can greatly improve the pass rate.

Two main purposes

It can be widely used in fracturing proppant fracturing deep, high-pressure oil and gas layers. High quality bauxite, the main raw  material crushing finely ground into powder resin coated frac sand after, with various additives, repeatedly mixing, granulating, polishing. High temperature sintering, the product has a high compressive strength, low density, good sphericity, finish high conductivity and strong advantages. By the China Research Institute of Petroleum Exploration and Development high density ceramic Langfang Branch support evaluation laboratory testing, the performance indicators fully meet SY / T5108-2006, SY / T6302-1997 standard, currently in the lead.

Exports and development of large enterprises frac proppant provides a rare opportunity

From the international environment, first, the ongoing transfer of industries in Western countries, China is facing a good opportunity to become the world's manufacturing center. Second, the international oil fracturing proppant prices continued to rise, stimulating investors have the funds to invest in oil exploration and development and oil processing, the formation of a new round of oil investment peak surge in demand for frac proppant. Our frac proppant products cost-effective than some developed countries, has a comparative advantage. Third, the three major oil well fracking companies are vigorously implement the "going out" strategy to accelerate overseas business development, can stimulate domestic frac proppant into the international market. These are for export and development of large enterprises frac proppant provides a rare opportunity. However, the development of frac proppant industry is also facing serious challenges. With international oil prices continued to rise and continued tight supply of oil and gas, oil and gas exploration and development Resin coated frac sand investment continued to increase the pace of energy such as oil and gas pipeline infrastructure continues to accelerate, substantial growth in demand for ceramic proppants, which also attracted a large number Investors have entered, intensified market competition.

Fired ceramic proppant production is most important a process

Fired fracturing proppant production is most important a process, have a great impact on their microstructure and macroscopic properties. After determining the ratio of the specimen, it will produce a fine powder in the firing process at a lower temperature Fracturing proppants between the liquid phase, but also to fracturing proppant and petrochemical reactions corundum crystal form transition occurs, and therefore the firing temperature must be controlled so that maintained within the optimum temperature range to ensure after the firing has excellent overall performance. If the temperature is too high there will be over-burning phenomenon, and ferric oxide (Fc203) of content. After the surface of a liquid phase, the oxygen diffusion to the center of the fracturing proppant block, this time occurs ceramic proppant suppliers reactions. Since the volume of the strength and the effect of the density of the reaction products are reduced. If the calcination temperature is too low due to burning phenomenon occurs due to insufficient sintering, its intensity is reduced. Firing temperature has little effect on the bulk density, but has a greater impact on the fracturing proppant crushing rate and the frac sand companies acid solubility. Minimum firing temperature corresponding crushing rate of 1360 ℃, while the corresponding acid solubility best when firing temperature is 1350 ℃. Therefore, in order to obtain the desired combination of properties, the firing temperature must be between 1350-1370 ℃; producing a high strength fracturing proppant to the firing temperature should be controlled at about 1360 ℃, the solubility of the acid <5%, to meet the Claim.

Frac proppant particulate product is a ceramic

It can be widely used in frac proppant fracturing deep, high-pressure oil and gas layers. Frac proppant is a granular product with high fracturing intensity, mainly for oilfield downhole support, to increase fracturing proppants production of oil and gas, an environmentally friendly product. This product is the use of high-quality bauxite and other raw materials, sintered ceramic, is a substitute for natural quartz sand, glass beads, metal balls and other low-strength frac proppant, to increase production of oil and gas have good results. When oil and gas exploration in deep, high ceramic proppants pressure low permeability deposits closed after fracturing treatment, the rock cracked petroleum, oil and gas channel formed from the cracks in the collection out. Ceramic support material along with high-pressure solution into the formation filling in cracks in the rock, play a supporting fissure is closed not because of the role of stress release, thereby maintaining high density ceramic conductivity, so that oil and gas flow, increase production. Practice has proved that the use of frac proppant fracturing wells can increase yields by 30-50%, but also to extend the service life of oil and gas wells. By the China Research Institute of Petroleum Exploration and Development Langfang Branch support evaluation laboratory testing.