The multi-scale volume fracturing in Henan Oilfield increases oil production and efficiency significantly

Sinopec News Network reported that 30 wells were fractured, and the effective rate of the measures was 94.
7%.
The oil increased by 14,900 tons in stages, and the average oil increased by 827 tons per well
.
This is the result of the application of multi-scale volume fracturing technology in the development of tight sandstone reservoirs by the Henan Oilfield Engineering Institute in the first nine months of this year

The middle series of Biyang Sag is a tight sandstone oil and gas reservoir, which is difficult to develop
.
In order to improve the development effect of the formation, they actively explored and tried a variety of fracturing methods, and multi-scale volume fracturing technology is one of them

Calculated at US$50/barrel, with the application of this technology, Henan Oilfield can effectively produce 4.
1 million tons of non-major reservoir reserves, and the efficiency has increased by 17.
85 million yuan
.

At present, the reserves of low-permeability tight sandstone oil and gas reservoirs in the eastern part of Henan Oilfield are 46.
75 million tons, and the remaining geological reserves are 43.
734 million tons
.
Among them, the low-permeability reservoirs with a recovery degree of less than 10% are mainly ultra-low permeability and ultra-low permeability.

During the "13th Five-Year Plan" period, by summing up the problems and difficulties in fracturing in the past, researchers found that the optimization of conventional fracturing fluids and construction parameters was not well-targeted, resulting in difficult control of fracture height and limited reconstruction volume; single sand adding method , Resulting in unsatisfactory fracture support profile, low fracture support efficiency in the far well zone, low fracture complexity, and the effect of post-fracturing stimulation and production stabilization are affected; the type of fracturing fluid is too single, and the optimization of fracturing fluid emphasizes more on the main fracture Seam efficiency, unable to open branch seams and micro-cracks
.

Based on the above problems, researchers established a low-permeability tight sandstone reservoir model in Biyang Depression, studied the influence of fracturing construction parameter changes on fracture extension parameters such as fracture height, fracture length, fracture width, and fracture creation efficiency, and found out the parameters affecting fractures The main control engineering factors
.
On this basis, they studied the formation of multi-scale volume fracturing technology through optimization of process parameters, optimization of low-damage fracturing fluids, optimization of fracturing fractures and fracture support efficiency, which increased the complexity of artificial fractures and increased the storage capacity.

The deep-seated tight oil and gas reservoirs in the deep depression area of ​​Biyang Sag have large thickness, many small layers, strong reservoir heterogeneity, well-developed fractures, and difficulty in adding sand
.
Aiming to fully cover the target layer, increase the complexity of fractures, increase the fracturing volume, and increase the output of a single well, the engineering institute adopts the "composite stratification + multi-scale volume fracturing" process to carry out multi-layer fine three-dimensional reconstruction

In the development of the Anpeng non-major formation in the Biyang Depression, Henan Oilfield has successfully applied this technology for 18 well times, increasing oil production by 14,900 tons and an average oil increase of 827 tons per well
.

The Henan Oilfield has successfully applied this technology for 12 well times in the exploration of deep-seated systems in the Biyang Sag
.
In February of this year, Henan Oilfield applied this technology to fracturing the pre-exploration well Bi395 well