A late-life gas operations expert explains how mature plants stay inside the liquids recovery window as inlet pressure declines through process flexibility first and staged compression second
The International Energy Agency is flagging a structural shift in oil and gas operations: decline rates are rising, so capital is increasingly spent to keep existing supply running. In practice, that pushes more assets into late life engineering where surface systems, compression, and process control determine how long liquids recovery stays economic and reliable.
Ilnar Iakhin focuses on how gas treatment plants stay inside the liquids recovery window as inlet pressure declines, including compressor period strategy, low temperature separation control, and reliability-driven modernization. His applied work on low-temperature separation includes a 2025 industry publication on recirculation-based hydrate prevention at low-temperature separation units. Currently, he is Head of the Production and Technical Department at Russia’s largest gas-producing enterprise, with more than 14 years in high load gas operations and engineering governance. He published a paper on how to fine-tune centrifugal separators using a computational-and-test approach that improves gas-flow regimes without major capital upgrades, released through Universal Library Open Access Publications LLC, an international peer-reviewed online publisher.
We explore how his approach turns late life constraints into a repeatable operating model that protects liquids yield, delays unnecessary compression spend, and raises the reliability bar for mature gas assets.
Many late-life gas facilities respond to declining inlet pressure with a single default move: add compression and accept the efficiency penalty. Ilnar’s analysis starts from a different premise.
“Decline is not just a reservoir issue. It is a system behavior problem that can be engineered. The objective is to keep the plant inside a defined liquids recovery window by controlling the few parameters that actually drive yield, then size compression as a consequence, not as a reflex”, the expert comments.
That framing is what changes the standard. It replaces “keep it running” with “keep it inside the window,” which is a measurable standard any operator can adopt regardless of geography.
The second idea is that liquids recovery in mature gas assets is often limited by surface thermodynamics, not by remaining resource. Temperature and pressure conditions determine how much condensate is captured versus lost in the gas stream. As inlet pressure drops, holding those conditions becomes harder. The usual response is to spend early on new compression.
Ilnar proposes a more disciplined sequence. That sequence is grounded in his applied research: in 2025, he co-authored an industry paper on flexible gas-treatment schemes designed for changing operating conditions. First, redesign the process so the facility can generate and retain more cooling effect within existing constraints. In plain terms, he shows that smart pressure letdown and energy recovery choices can preserve low temperature separation performance at lower inlet pressures. That creates operating headroom and can push major compression decisions later, when they are truly unavoidable.
For international readers, the point is not the exact mechanics of the equipment. The point is the standard: extract flexibility from the process first, and only then lock in large compression investment.
Where compression is required, Ilnar’s logic treats it as an architecture with stages and modes, designed for how decline actually unfolds. Instead of building a system that is optimal for one year and overbuilt or unstable in another, the design is set up to shift operating mode as conditions change. That is a reliability standard as much as an efficiency choice, because unstable compression regimes in late life operations are a primary driver of trips, wear, and downtime.
It is transferable. Mature assets need compression that can move between regimes predictably, without pushing the plant out of its recovery window.
Another part of the approach is pragmatic and globally relevant. If there is existing compression capacity elsewhere in the asset network, it can be used as a bridge instead of immediately building new capacity at every facility.
As Ilnar says, “You can only use existing compression if it can safely take the additional load. That requires three checks: the pipeline can deliver the flow without excessive pressure loss, the compressor station has enough spare capacity, and the equipment is in verified working condition.” In late life plants, reliability debt is expensive, so any bridge strategy must be built on proven equipment health and clear operating limits.
This raises a standard that many mature basins need right now: smarter asset integration, but with explicit integrity controls.
The global direction for gas operations is clear. More facilities will spend more time in late life mode, and the winners will be those who can keep liquids recovery stable while containing compression costs and reliability risks. Ilnar Iakhin’s ideas are to turn that challenge into a repeatable model: define the liquids recovery window, redesign the process for flexibility to stay inside it at lower inlet pressure, stage compression to match decline behavior, reuse infrastructure only with integrity gates, and treat corrosion protection as a controlled system.
In one implementation, the technology extended compressor-free operation of a gas treatment facility by five years, reduced annual operating and materials costs by more than $5.3 million, and lowered emissions by approximately NO 125.5 t/year, NO₂ 128.8 t/year, CO 810.9 t/year, and CH₄ 237 t/year. The results at this scale show how late-life optimization can extend productive run time while cutting both operating spend and local air pollutants and methane emissions.
For the industry worldwide, the new standard is measurable operating headroom created by process intelligence and reliability engineering, so late life operations remain predictable, scalable, and economically defensible.
