1. Technical introduction
In order to meet the requirements of fine cutting, rapid layering, full hole production after fracturing and large rate fracturing in horizontal well reservoir reconstruction, the CT bottom seal drag fracturing technology was developed. Through the optimization and improvement of core tools such as packer and sand-blasting perforator, erosion analysis and field verification, the construction performance index of full displacement of 14m3/min under quartz sand condition is broken through, and the fixed-point refined transformation of the reservoir is realized, overcoming the imbalance and deficiency of single cluster transformation of horizontal well drilling bridge plug + cable cluster perforating process. In particular, the idea of single stage and double cluster fracturing was innovatively proposed, and the new asymmetric hydraulic spray gun support with independent intellectual property rights was adopted to form double main fractures and complex fracture network structure in the process of fracturing reconstruction, which increased the contact area between fractures and reservoir matrix, and achieved good reconstruction effect.
2. Technical characteristics
It has the characteristics of precise positioning and fine transformation.
Do not kill well, reduce the damage to oil and gas reservoir;
Fast tripping speed enables rapid layer-changing and multiple layers can be fractured in one trip.
After operation, the wellbore is smooth and clean, allowing rapid production and eliminating complex processes such as drilling and plugging.
3. Technical indicators
The maximum deviation of construction well is 90°, the temperature resistance is 120℃, and the pressure resistance is 70MPa.
The drag capacity of a single set of tools is 15 segments;
Maximum construction displacement 15m3/min;
The maximum construction capacity is 6 sections per day.
4. Scope of application
Horizontal well fracturing for unconventional reservoirs such as shale oil, tight oil and volcanic rock;
Fine layered fracturing in new vertical Wells;
Fracture fracturing is used in new vertical Wells, fracture fracturing is used in new high-inclination Wells, and reverse fracturing is used in old Wells.
It can also be used for leak detection in new and old Wells.
Coiled
TUBING hydraulic jet capping annulus fracturing technology
1. Technical introduction
Coiled
Tubing carries downhole tools into the well. The bottom packer was first sealed, then the coiled tubing channel was used for hydraulic jet perforation, followed by a large-scale fracturing operation through the annulus. Setting, perforating, fracturing, opening, lifting, and multizone fracturing are completed in stages.
2. Technical characteristics
There is no limit to the number of stages/formations;
Coiled tubing sandblasting and annulus fracturing can realize large-scale transformation.
The packer can be set and unpacked multiple times, and can be used in conjunction with coiled tubing to enable continuous multistage reconstruction without killing the well.
3. String combination
1 -- Coiled tubing connection/release; 2 - Centralizer; 3 - Hydraulic injection tools; 4 - Balance valve/reverse circulation connector; 5 - Packers and anchors; 6 - Mechanical
Casing joint locator; 7 - guide cone
4. Scope of application
It is suitable for horizontal well with multi-thin reservoir, coal-bed methane branch well and well with small
CASING size that cannot be conventional fracturing.
ESASTSUN OILFIELD EQUIPMENT MANUFACTURING (CAMBODIA) CO., LTD