Flaring, Gas Injection and Reservoir Management Optimization: Preserving Reservoir Energy Maximizes Recovery and Prolong the Life of an Ageing Brown Field

Moreno, Jaime Eduardo; Badawy, Amr Mohamed; Kartoatmodjo, Gayatri; Al-Shuraiqi, Hamed; Friedel, Torsten; Zulkhifly, Farhain; Tan, Lee Ting

doi:10.2118/122339-ms

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…The flaring or venting of associated gas not only causes energy waste but also adversely affects the environment. In contrast, reinjection is a type of treatment method that is beneficial to sustainable development [ 3 , 4 , 5 ]. In some oil fields, associated gas is used as a lift gas to raise oil recovery [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

et al. 2018

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Corrosion has been responsible for several gas pipeline leakage accidents; thus, clarifying its failure mechanisms is a precondition to prevent such accidents. On the basis of failure analysis of corroded pipe sections, laboratory exposure tests were conducted by simulating three possible corrosion environments inside a gas pipeline. The corrosion rate indicated by depth change was adopted in this study. Scanning electron microscopy and X-ray diffraction were used to analyze corrosion products. Results showed that the specimens completely immersed in condensate water were generally corroded and that the specimens exposed to gas were locally corroded. However, the corrosion rate of the latter was slightly lower; hence, no autocatalysis of occluded corrosion cell occurred in the formation of corrosion pit, and uniform corrosion occurred in the precipitation location of condensate water. The areas in the range of 5 mm below the waterline indicated severe corrosion, and the rate could reach twice that of other areas. The corrosion products were mainly FeO(OH) and FeCO3, thereby proving that the corrosion failure of pipelines was caused by oxygen absorption corrosion and CO2 corrosion. Suggestions were presented to control corrosion failure of associated gas pipelines.

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Section: Introductionmentioning

confidence: 99%

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

et al. 2018

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Reservoir to Surface: An Effective Combination to Unlock Oil Reserves From Aging Reservoirs

Moreno

Kartoatmodjo

Friedel

et al. 2010

SPE Asia Pacific Oil and Gas Conference and Exhibition

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One of the main drivers of field development is maximization of oil reserves. The value of assets and therefore companies is strongly linked to the amount of producible reserves of their holdings. Traditionally the full potential of the reservoir is locked due to a series of limitations both at the sub-surface and surface. Increasing in oil demand challenges the development not only to improve on oil recovery but also boost the near term production. Subsurface models are extensively used to determine the optimum development strategy for the field, infill wells are used to target un-swept areas of the reservoir, while water and or gas injection may be used to preserve reservoir energy. In comparison surface facilities are not so extensively looked after especially in an offshore environment, and often times only a de-bottlenecking of the optimum sub-surface case is performed. The integration between surface network modeling and subsurface modeling is critical to ensure field operation is in line with reservoir management and the facility is adequate to handle the expected production. This paper discusses the various stages of optimization, using numerical simulation combined with a surface model, to determine the impact of surface operations in overall field performance. The results allowed shifting of the resources to further understand the surface operations which affect the overall field performance as well as identifying near term production enhancement opportunity. This work shows how an effective combination of reservoir energy preservation by means of upgrading the current surface facilities and adding optimized existing wells accounts for as much as 50% of the total potential recoverable reserves. Furthermore, after evaluating each development options, a matrix risk is formulated to take into account not only the quality and quantity of the data but also the degree of man interventions during the life of the field (surface optimization). Value-of-information figures were then associated to each of the suggested new data/equipment to help prioritize the development As a result measurement efforts were carried out including horizontal production logs to minimize uncertainty of the reservoir contribution.

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Utilization of Excess Flared Gas from Gas Lift System as a Gas Injection -An Innovative Method to Reduce Emissions and to Save Energy

2012

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Kaji-Semoga fields in South Sumatra, Indonesia, are oil fields with a gas lift population of almost 50%. Since there is no gas source available in Kaji-Semoga fields, both the gas lift and fuel system are dependent on produced gas from oil producing wells. Based on an overall review of the gas lift system, the flare is inefficient. Pressure Control Valve (PCV), which controls the flare, is opened when the gas lift pressure reaches 815 psig, yet only 800 psig is needed for a normal operation. The gas lift pressure usually exceeds 815 psig, hence gas is flared. On the other hand, compressor suction often drops below the safety level. To overcome this problem, KS-X (Telisa gas cap) is produced around 1-2 MMSCFD. The production of Telisa gas cap has a very negative impact on this formation, causing a decrease in reservoir pressure of 60% in just 4 years. Since Telisa reservoir pressure has depleted from 900 psig to 400 psig, it is easy to inject excess gas from the flaring system. PCV is added to the gas lift system and is set at 805 psig to open. The current gas lift line at KS-X has also been modified to be able to inject the excess gas to the well via the installed gas lift valve. Based on the daily record, the injection system is able to save flared gas and reduce produced gas from Telisa Kaji by up to 1 MMSCFD. Both gas lift system and compressor suction pressure are also relatively more stable after injection. It is concluded that the recycle-injection system is a proven and practical method to use in mature fields where there is no gas reservoir available as a fuel source. The system is able to save up to 1 MMSCFD of flared gas worth $8,000 per day (based on the local market gas price).

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Flaring, Gas Injection and Reservoir Management Optimization: Preserving Reservoir Energy Maximizes Recovery and Prolong the Life of an Ageing Brown Field

Cited by 4 publications

References 13 publications

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Reservoir to Surface: An Effective Combination to Unlock Oil Reserves From Aging Reservoirs

Utilization of Excess Flared Gas from Gas Lift System as a Gas Injection -An Innovative Method to Reduce Emissions and to Save Energy

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