Significant fracturing results in well Bi280, a key exploratory well in Henan Oilfield

Sinopec News Network reported on September 12, the key exploratory well of Henan Oilfield was secreted 280, which lasted 16 hours and successfully completed the fracturing task.
The total fluid consumption was 2855.
59 cubic meters (the design was 2852 cubic meters) and the total sand addition was 126.
92 cubic meters ( Designed 126.
12 cubic meters), setting a record high in the scale of vertical well fracturing construction in Henan Oilfield
.

The purpose of this fracturing is to carry out partial pressure reforms on the Ⅶ8-9 and Ⅷ3-4 layers of Well Mi280, confirm the reserves scale of this area, expand the exploration space of deep tight sandstone oil and gas to the northwest, and promote the development of multiple points in the exploration field.
"
.

The deep system of the Biyang sag is one of the key research directions of the integrated team in the central and southern Biyang sag of Henan Oilfield.
Following the discovery of tight oil and gas in the east and south of the sag, the project team strengthened the overall evaluation of the deep tight oil and gas in the sag, and proposed “overall deployment and analysis”.
The working idea of ​​implementing step by step and improving the efficiency of old wells, followed the principle of “geological potential, resources have scale, old wells can be used, and engineering can be realized”, strengthened the simultaneous evaluation of geology and engineering, and proposed an evaluation of well Bi280 in the western part of the depression.
Re-check old wells to control the scale of tight oil and gas deep in the depression and expand the scale of tight oil and gas
.

　　The target layer of Well Mi 280 is faced with many difficulties in the transformation: first, the reservoir has poor physical properties (porosity 0.
1%-2.
2%) and low formation pressure coefficient (0.
77).
It is difficult to achieve the late-stage stimulation effect by relying solely on matrix seepage; The reservoir rock is tight, the two-way stress difference is large (8-10 MPa), the fracture extension is difficult for fracturing reformation, and the fracture creation efficiency is low
.

　　To this end, focusing on fracturing difficulties and technical bottlenecks, the Academy of Engineering organized experts and technicians to immediately set up key exploratory well fracturing project teams, and at the same time give full play to the geological engineering integration project team strength, joint project team members, upper and lower linkages, parallel interaction, high efficiency , High-quality collaboration completed multiple fracturing demonstrations such as target layer coring, indoor core comprehensive evaluation experiment, perforation sweet spot optimization, comprehensive compressibility analysis and calculation, geological modeling, fracture propagation simulation, etc.
, and finally formed a fluid supplement The fracture network fracturing process idea with the core of energy enhancement, control of fracture expansion, temporary plugging and promotion of fractures, and increase of oil and gas discharge area has realized refined transformation simulation and optimized design of key parameters
.

　　At present, the well is still in the drainage stage, and the post-compression effect continues to improve.
The technical staff of the Henan Oilfield team will continue to track the late effect of the well
.