I. The Imperative for Deep-Earth Exploration
With the global transition of oil and gas exploration toward ultra-deep (exceeding 6,000 meters) and ultra-low permeability reservoirs, conventional gas injection technologies are encountering fundamental limitations. In basins such as Tarim and Sichuan, ultra-deep resources account for over 60% of total reserves, with reservoir pressures frequently exceeding 100MPa. Standard 15-35MPa injection systems are incapable of effective delivery under such conditions. Consequently, surpassing the 70MPa technical threshold has become a prerequisite for reservoir pressure maintenance and ensuring the economic viability of extraction.
II. Core Values of Technical Breakthroughs
● Pressure Maintenance: The 70MPa rating ensures that nitrogen can overcome immense formation resistance to replenish energy in depleted reservoirs.
● Enhanced Displacement Efficiency: Under high-temperature and high-pressure (HTHP) conditions, nitrogen achieves a near-miscible state, significantly improving the recovery factor of crude oil.
● Reservoir Stimulation: In unconventional development, this technology fulfills the dual requirements of hydraulic fracturing support and high-efficiency flowback enhancement.
III. Critical Support for Precision Development
In the fractured-vuggy carbonate reservoirs of the Tarim Basin, characterized by high heterogeneity, the powerful displacement front formed by 70MPa high-pressure nitrogen effectively mobilizes residual oil inaccessible by conventional means. Similarly, in Sichuan’s shale gas operations, this technology ensures both effective reservoir stimulation and rapid fluid recovery.
IV. Transitioning from Equipment to Integrated Solutions
The 70MPa specification is more than a pressure parameter; it is the technical benchmark for nitrogen injection systems capable of strategic deep-earth operations. It represents a fundamental shift from routine oilfield maintenance to strategic resource development, ensuring that operational objectives—"injectable, displaceable, and extractable"—are met under extreme conditions.
