Oilfield Stimulation
Equipment & Integrated Services

Zelin is a professional enterprise focusing on the R&D and integrated services of oil and gas field stimulation technologies, committed to becoming a world-leading integrated technical solution provider.

Core Focus Areas

  • ✅ Oil exploitation technology R&D
  • ✅ Oil & gas engineering technical services
  • ✅ Marine petroleum engineering services
  • ✅ Oilfield stimulation (fracturing / acidizing / EOR)

Company Profile

Technology-Driven, Service-Empowered

About Zelin

Full-chain oilfield stimulation solution provider

Dongying Zelin Petroleum Equipment Co., Ltd. has long been deeply engaged in the oil and gas field service industry. Taking advantage of Dongying’s geographical position as a core agglomeration area of China’s petroleum equipment industry, Zelin integrates high-quality industry resources and provides a full-chain service system from technology R&D and scheme design to on-site implementation and operation & maintenance support.

Zelin continues to invest in low-carbon and environmentally friendly stimulation technologies and unconventional reservoirs development, promoting the integration of digital and intelligent technologies with oilfield services.

Strength

Reliable delivery & quality management

• Professional R&D team with industry experts and technical backbones
• Long-term cooperation with scientific research institutions
• Strict quality control system and safety management specifications
• Rich experience in domestic and overseas oil & gas projects

Equipment & Services

Sales + operation & maintenance services for oilfield applications

Service 01

Nitrogen Generation & Injection

Zelin provides sales of various types of nitrogen generation and injection equipment and corresponding professional operation and maintenance services.

Nitrogen Equipment
Service 02

CO2 Flooding Equipment & O&M

Zelin provides CO2 oilfield application equipment for CO2 flooding and corresponding operation & maintenance services.

CO2 Equipment
Service 03

Natural Gas Compression & Reinjection

Zelin provides natural gas compression and reinjection equipment and professional O&M services to improve recovery and reduce emissions.

Natural Gas Equipment

Technology

Key principles & suitable reservoirs

Nitrogen Foam Flooding

Nitrogen foam flooding technology

Nitrogen foam flooding technology can reduce water cut and enhance oil recovery by increasing swept volume. Foam dynamically blocks high water-cut pores, expands swept volume, and realizes water control and productivity increase.

• Prioritizes large flow channels and increases sweep volume
• Higher apparent viscosity helps avoid viscous fingering
• Gas accumulation helps displace residual oil
• Surfactant improves oil washing efficiency
Natural Gas Reinjection

Pressurization & reinjection technology

After recovery and pressurization, natural gas can be reinjected by single-well huff-and-puff or well-group gas flooding to replenish formation energy and improve oil displacement efficiency.

• Replenish formation energy & improve productivity
• Reduce crude oil viscosity due to gas solubility
• Reduce interfacial tension via light components extraction
• Easier miscibility under formation conditions

Application Case

Field-proven performance improvement

Case

Tahe Oilfield YT2 Block – Three-phase Compound Flooding

In the late stage of waterflood development, injected water burst unidirectionally along large pores, resulting in high water cut. After implementing three-phase compound flooding (solid phase + gas phase + liquid phase), the well group injection effect improved. Comprehensive water cut reduced to 69.5%, daily oil increase reached 12–18t, and cumulative oil increased by 2449t.

Contact

Get in touch for solutions, equipment, and services

Dongying Zelin Petroleum Equipment Co., Ltd.

Address:
No. 2 Jiaxiang Road, Dongying High-Tech Industrial Development Zone,
Dongying District, Dongying City, Shandong Province
Building 1, West Tower, Room 801-1, Dongying Yunchuangxiang Industrial Park

E-mail: wangyunzhe@zelintek.com

Online Inquiry