With the aging of global oilfields, the production drops naturally as a result of the reduction in reservoir pressure and other factors. Research suggests that large oilfields normally exhibit annual decline rates of 5% to 12%. The need to use more sophisticated extraction procedures results in this decline.
As the fields age, the challenges of production become increasingly complex. The wells are often transferred from being used primarily in recovery operations to secondary and tertiary methods, making the process of intervention much more complicated. This process explains why there is such high demand for coiled tubing services today.
(Source: IEA)
Rising Water Production and Operational Challenges
One of the most significant problems encountered in aging oil fields are the problem of excessive water production. Towards the later part of field lifecycle, some mature wells experience water cuts that can reach 70%-90%, making the process of oil production inefficient. This results in costly lifting processes, corrosion, scaling, and extra separation costs.
Water production management alone can consume millions each year in some of the biggest oil-producing countries, indicating the financial burden of having mature oil wells. Such problems require well intervention activities like water shut-off, well clean-out, and chemical treatment, which are best performed by coiled tubing equipment.
(Source: MDPI)
Cost Efficiency and Production Optimization
It was discovered that coiled tubing proved to be highly efficient for mature oilfields because it made possible carrying out an intervention without interrupting oil extraction. In comparison to conventional oilfield exploration drilling techniques, on average, the cost savings of using coiled tubing drilling technology is 37%, with a range of 22% to 48%.
Furthermore, with the use of sophisticated technologies like underbalanced coiled tubing drilling, depletion problems can be mitigated to increase oil recovery rate by up to 30%, reduce formation damage and boost production efficiency.
(Source: OnePetro)
Increasing Complexity of Well Architectures
Most developed mature fields involve wells that are either horizontal or multilateral wells, which require special equipment for servicing. The coiled tubing provides the main benefit since it can be used in very deviated wells, while conventional wireline systems operate with the help of gravity.
It becomes significant as more sophisticated wells have to be used in order to extract the last reserves. Therefore, coiled tubing makes it possible to conduct all the required operations in real time.
Technological Advancements Enhancing Efficiency
Technology advances are changing the nature of coiled tubing applications. Monitoring and control systems that can provide real-time information and automate some functions improve the performance of these operations while reducing downtime.
This improvement comes handy especially in cases when the field reaches maturity stage and small improvements can bring substantial results. Modern coiled tubing tools can perform specific operations and reduce potential risks.
Conclusion
Mature oilfields are causing changes in priorities within the oil and gas sector, with the emphasis now on optimization rather than exploration. Lower production rates, higher water cut, and more complicated wells are creating the necessity of having efficient and economic intervention techniques. It is here that the role of coiled tubing becomes particularly important since it helps deliver significant cost advantages, improved performance, and flexibility. With oil fields all around the world becoming ever more mature, there will be an increased demand for coiled tubing operations, thus making them integral to sustainable hydrocarbons extraction highlighting the increasing significance of the coiled tubing market.
FAQs
- Why does mature oilfield require coiled tubing?
- The mature oilfield requires coiled tubing because of low productivity and frequent interventions.
- Why do we use coiled tubing to minimize cost?
- We use coiled tubing to save cost as we don’t require a complete setup of the rig.
- Why is the water production rate high in mature oilfields?
- It is because of reservoir depletion and aquifer break through that causes high water production rate.
- What is the contribution of coiled tubing in enhanced oil recovery?
- Coiled tubing is used in chemical injection, well stimulation, and bypassed reserves recovery for enhanced recovery.
- Is coiled tubing appropriate for horizontal wells?
- Coiled tubing is very much appropriate for horizontal wells because it is inserted easily.
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