Successful application of integrated low-damage fracturing fluid system in Dongsheng Gas Field

Sinopec News Network News As of July 22, the integrated low-damage fracturing fluid system promoted by the Petroleum Engineering Technology Research Institute of North China Oil and Gas Branch has been successfully applied in 8 wells in the Dongsheng Gas Field, saving 845,000 yuan in cost compared with the guar gum system.
, At the same time, through online mixing, the construction efficiency of 8 stages of 24-hour zipper operation of the two-well well group is realized.
This system reduces the cost of fracturing operation and effectively improves the operation efficiency on site
.

For tight sandstone gas reservoirs with strong heterogeneity, in order to expand the reconstruction volume and improve the reconstruction effect, the design idea of ​​"large displacement + large liquid volume" dense cutting + mixed water volume fracturing is adopted.
Guar gum system-based low-viscosity linear glue and high-viscosity cross-linked jelly fracturing fluid.
Low-viscosity linear glue is used to control the height of joints and communicate with natural cracks to expand the volume of reconstruction; high-viscosity cross-linked jelly is used to create fractures And carry sand to improve the flow conductivity
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Since the conventional guar gum fracturing fluid system has many additives and slow swelling, the low-viscosity linear glue and the high-viscosity base fluid need to be prepared separately.
In order to ensure the uniform dispersion of the fracturing fluid, the liquid needs to be configured in advance.
At the same time, the guar gum system belongs to Vegetable glue is easily deteriorated under the influence of temperature, and it is easy to cause a large amount of liquid waste due to discontinuous construction
.

The integrated low-damage fracturing fluid system adopts a single emulsion that integrates the functions of "thickening + drainage + anti-swelling + resistance reduction".
It is equipped with clean water, using a sand mixer to achieve online mixing, and adjusts the concentration of the emulsion to achieve high and low levels.
Effective conversion of viscous liquid; at the same time, the integrated emulsion belongs to the polymer chemical synthesis system, which is safe, has strong temperature resistance and antibacterial properties, has strong adaptability to the environment, is not easy to deteriorate, and has no residues in the flow-back gel breaker.
It is through simple precipitation Can be reused
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　　The application of this system greatly improves the efficiency of fracturing construction and the post-compression effect while reducing construction costs
.

　　(Lu Jiaoping, Zhao Qian)