The ends off the sand fracturing technology

With the exploitation of oil and gas fields crossover technology development and integrated use of a variety of process technology, the scope of application of fracturing proppants technology is no longer confined to low-permeability formations, high-permeability formations have begun to use this technology to improve development results. When oil well fracking  technology used in high-permeability formations, hoping to form a short, wide cracks and crack control as much as possible within the scope of the oil and gas layers. In order to meet the requirements of this particular foreign mid-80s in the 20th century developed the ends off the sand natural gas fracking  technology, and soon applied to the site, currently also carried out research in this area, and has made great progress .

Density proppant improve fracture conductivity

Presented findings water fracturing fluid density ceramic proppant suppliers  To investigate this new fracturing fluid proppant carrying capacity and the ability to completely fill proppant problem generating cracks. Studies have shown a conventional proppant pack, which can only generate a fracture cross section of the hydraulic fracture stimulation pack, while the use of a low density proppant, can fracture length and high slit cracks can be further extended. So far, in the Permian Basin of west Texas, has been the application of this new technology was patented 130 times fracturing treatment, this new technology is mainly used an artificial low-density material called LiteProp

Economic benefit of fracturing proppant

Proppant economic benefit, as one of the fracturing proppant material, in the evaluation of fracturing economic benefit is always an expenditure. As specified in the fracturing payback time (for example, six months or a year) is fracturing design personnel must compare various proppant in the same closed pressure prices than [unit, um2.cm/ ($.T) or um2/ ($.M3)] and price than in the overall net gains (NPV value) and the effects of continuous time.

  If a certain type of a certain size of proppant conductivity in the provision of the repayment time can meet the requirements, the proppant can be used as one of the candidate's support agent.

Precise hydraulic fracturing design

Large water conservancy frac proppant selection and optimization design, the site has been in use is to repeat the test approach, in this more than 10 years, the continuous improvement of calculation model, obviously improves the feasibility of time and contains repayment cash flow rate of economic evaluation, the precise design.( ceramic proppant supplier )

  In order to obtain high flow capacity and the deep penetration of the fracture, fracturing design accurately is absolutely necessary. According to the reservoir conditions on individual applications conventional fracturing proppant selection, through the standard curve analysis and supporting agent property valuation determined.

Uniform particle size, low density.

Uniform particle size, low density.

In general, hydraulic fracturing with proppant size is not single, but a certain range, if the separation degree of the support agent difference, the process of reproduction, blocking flow channel, the influence of sand filling fracture flow conductivity of proppant, so the particle size and the degree of sorting is a certain request.

In the domestic field of commonly used 20/40 mesh support agent as an example, there are at least 90% sand through the sieve after is located in the 20~40 between the eyes, at the same time demand is greater than the first number sieve sand weight is less than 0.1%, but less than the last screen amount cannot be greater than 1%.

The ideal support agent density is small, preferably less than 2000kg/m3, in order to facilitate thecarrying fluid to carry into the fracture.

The choice of meaning of oil fracturing proppant

Hydraulic Fracturing Proppants accounted for the entire cost of 1/3~1/2, not only often represents amost cost of oil and gas well early, but especially decides the economic life of oil and gas wells or oil.

  Fracturing charges too large may be unnecessary waste of the whole capital, whereas the fracturing operation is too small, will be due to lack of reservoir produced fluid, resulting in a well withoutbenefit.

  In the fracturing operation, the fluid in the reservoir gradually discharged, leaving only is proppant propped fractures, to keep the channel open. Provide a high flow capacity of channel, to increase oil and gas flow can flow into the wellbore, keep the reservoir long-term flow capacity.

  Therefore in hydraulic fracturing optimization design, type and size of produced layer supporting agent have significant meaning and key role.

The requirements of oil field

In order to ensure the oil fracturing effect, the requirements of various oil companies must use the oil fracturing proppant products manufacturers and management within the network, and requests the oil oil and gas production departments take the responsibility, management the oil fracturing proppant daily work.

  If the oil found good proppant sand manufacturers and products in new product trial, should be timely recovery toexploration and production company of technology of gas recovery and recommended requirements manufacturers put forward as soon as possible network applications.

Viscoelastic surfactant fracturing fluid

To reduce the fracturing process proppant sand manufacturers  eservoir and propped fracture injury , developed a viscoelastic surfactant fracturing fluids and using a capillary rheometer test equipment, the performance of fracturing fluid were Research . Laboratory evaluation results show that the ceramic proppants under conditions of 100 ℃ and 170s-1 , and after 1h shear viscosity in 130mPa · s or more ; 120 ℃ under the conditions of 170s-1 and , after 1h shear viscosity of 50mPa · s or more ; with the extension of the shearing time , a small change in viscosity of the fracturing fluid ; with decreasing temperature , the viscosity of the fracturing fluid has good recovery . The test results show that the high viscosity fracturing fluid and low cost , formation damage fracturing fluid lower than about 50 %. Field test confirmed that friction viscoelastic surfactant fracturing fluid equivalent to 25 % to 30% water friction , and friction is lower than the fracturing fluid 1MPa/1000m, 2口fracture stimulation of oil wells 5600t. Use the fracturing liquid fracturing , can effectively reduce the fracturing fluid to the reservoir and propped fracture damage, while improving the well stimulation effect . 

Proppants be used in deep, high-pressure oil and gas layers.

Proppants for hydraulic fracturing can be used in deep, high-pressure oil and gas layers. High quality bauxite, the raw material for the king to be finely ground into a fine powder after crushing, with various additives, repeatedly kneading, granulation, polishing. Sintered at high temperature, the fracturing proppant has high strength, low density, good sphericity, finish high conductivity and strong advantages. By the China Research Institute of Petroleum Exploration and Development, Langfang Branch support evaluation laboratory testing, the performance indicators fully meet SY / T5108-2006, SY / T6302-1997 standard, currently in the lead.