scholarly journals ON NECESSITY TO CREATE UNDERWATER OIL AND GAS FLEET FOR DEVELOPING OIL AND GAS FIELDS IN LONG-FROZEN DEEP ARCTIC SEAS

2019 ◽  
pp. 34-40
Author(s):  
Chingiz Saibovich Guseinov ◽  
Dmitry Leonidovich Kulpin ◽  
Galie Hamzaevna Efimova
Keyword(s):  
Deep Water ◽  
Oil And Gas ◽  
Arctic Seas ◽  
Oil And Gas Fields ◽  
Sea Bed ◽  
Ice Conditions ◽  
Production Technologies ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil

The article dwells upon the problem of developing offshore oil and gas fields around the world accompanied by producing not only stationary and semi-submersible rigs and drilling vessels, but also a large number of auxiliary vessels for various functional purposes. It would be impossible to extract offshore hydrocarbons under the sea bed without them. Special fleet was formed during the years of development of offshore oil and gas fields in the Russian Federation, the part of it being imported. In the upcoming years, our country will face some challenges related to the development of Arctic reservoirs which are mainly located in the long-frozen deep seas. Their development in deep water will only be possible with auxiliary fleet, as it will be necessary to build deep water drilling vessels and other facilities/vessels. The types of vessels of the modern oil and gas fleet are presented, depending on the area of navigation, the depth of use and the specifics of the work performed. It is noted that currently in world practice there are no examples of using proven drilling and production technologies in severe ice conditions, when ice thickness exceeds 2-3 m, because the modern ice-resistant stationary platforms can not withstand the load at a depth of more than 80-100 m. The auxiliary fleet will both service offshore rigs and ensure their long-term productivity and functionality. For the development of oil and gas fields in the long-frozen Arctic deep-sea areas it is necessary to create a full-fledged underwater oil and gas fleet.

scholarly journals Problems of development and economic evaluation of production of natural hydrocarbons on the offshore of the Arctic Seas

2021 ◽  
Vol 1201 (1) ◽  
pp. 012061
Author(s):  
Y Bogatkina ◽  
N Eremin ◽  
O Sardanashvili
Keyword(s):  
Oil And Gas ◽  
Economic Effect ◽  
The Arctic ◽  
Arctic Seas ◽  
Oil And Gas Fields ◽  
Production Sharing ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil ◽  
License Holder

Abstract The purpose of this article is to substantiate taxation models that have contributed to an increase in the efficiency of offshore oil and gas fields that are at the stage of mature development in the harsh Arctic conditions. The development of Arctic fields under the current tax regime is on the verge of profitability. As an experiment, an economic assessment of the main economic indicators of the option for the development of the Prirazlomnoye field was carried out, taking into account various tax mechanisms used to assess the effectiveness of the development of offshore oil and gas fields. The calculation results showed that the application of the tax regime in force in Russia makes the development of the Prirazlomnoye field efficient, but with a relatively low profitability for the license holder. As an alternative, the tax mechanisms laid down in the production sharing agreements in China and Russia were used, which showed a high economic effect with a low level of risk. It can be concluded that the use of taxation models, which are similar in nature to a production sharing agreement, significantly increases the efficiency of the Prirazlomnoye field development, and can bring greater financial benefits to the license holder in comparison with the current tax regime in the Russian Federation.

A review of treatment technologies for produced water in offshore oil and gas fields

2021 ◽  
Vol 775 ◽  
pp. 145485
Author(s):  
Yiqian Liu ◽  
Hao Lu ◽  
Yudong Li ◽  
Hong Xu ◽  
Zhicheng Pan ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Produced Water ◽  
Oil And Gas Fields ◽  
Treatment Technologies ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil

Environmental Effect on Fatigue Life of FPSO Hull Structures

2009 ◽  
Author(s):  
Xiaozhi Wang ◽  
Booki Kim ◽  
Yanming Zhang ◽  
Ping Liao
Keyword(s):  
Oil And Gas ◽  
Low Cycle Fatigue ◽  
Oil And Gas Fields ◽  
Analysis Methodology ◽  
Work Area ◽  
Wave Conditions ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil ◽  
And Storage

Floating production, storage and offloading systems (FPSOs) have been widely used in the development of offshore oil and gas fields because of their many attractive features. These features include a large work area and storage capacity, mobility (if desired), relatively low construction cost and good stability. They are mostly ship shaped, either converted from existing tankers or purpose built. The hull structural scantling design for tankers may be applicable to FPSOs; however, FPSOs have their own unique characteristics. FPSOs are located at specific locations with a dynamic loading that is quite different from that arising from unrestricted ocean service conditions for tankers. It is also noted that the wave conditions in recent FPSO applications may be very complicated when operating in areas such as those offshore West Africa and offshore Brazil where both seas and swells exist and propagate in different directions. In this paper, the unique FPSO operational aspects, especially the load assessment due to on-site environments will be described. The methodology of handling complicated wave conditions in fatigue assessment will be addressed. Special considerations for converted FPSOs, which need to take into account their operational history as a trading tanker and low cycle fatigue due to FPSO operations, will also be introduced. Case studies will be presented and appropriate analysis methodology will be summarized. The methodology has also been adopted by ABS Guide, see ABS [1].

SUBSEA PRODUCTION FOR WELLS DRILLED FROM JACKUP DRILLING UNITS

1987 ◽  
Vol 27 (1) ◽  
pp. 357
Author(s):  
M. Thatcher ◽  
D.B. Marietta
Keyword(s):  
Oil And Gas ◽  
Production Systems ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
Gas Fields ◽  
Offshore Oil

Subsea production systems have been an accepted method of developing offshore oil and gas fields since the installation of the first subsea trees in the early 1960s offshore California. Generally subsea completions have been done from floating drilling vessels on wells with subsea wellhead equipment. A number of wells have been completed subsea by bottom supported jackup rigs on wells drilled using mudline suspension equipment. The subsea completion equipment and methods utilised to adapt mudline suspension wells for a subsea production tree are described. This method of completion offers important benefits as it allows completion of wildcat or delineation wells, it can be used in areas of small, scattered reservoirs, and it can be used in conjunction with floating production systems. The cost associated with these subsea completions is roughly equivalent to those of standard subsea completions from floating vessels. An overview of a typical completion system is presented and compared.

An Investigation Into the Effect of Turret Mooring Location on the Vertical Motions of an FPSO Vessel

1999 ◽  
Vol 121 (2) ◽  
pp. 71-76 ◽  
Author(s):  
K. P. Thiagarajan ◽  
S. Finch
Keyword(s):  
Oil And Gas ◽  
Single Point ◽  
Mooring System ◽  
Interior Space ◽  
North West ◽  
Design Considerations ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil

Turret-moored floating production storage and offloading (FPSO) vessels have found application in several offshore oil and gas fields in Australia’s North West Shelf (NWS). These vessels are either custom-built or converted tankers, with an internal or external turret. The position of an internal turret is decided based on a number of design considerations, primarily, available deck and interior space, and weathervaning capabilities. It is known that turret position can influence vertical motions and accelerations of a vessel, but this factor has not been given much importance, in comparison with the effects on the horizontal plane motions, primarily surge. This paper presents the results of a pilot study conducted at the Australian Maritime College, Tasmania, to study the vertical motions of a single-point moored FPSO model in waves, while systematically varying the mooring position across the length of the model. The displacement of the vessel was held constant at 50-percent-loaded condition. A single-point mooring system was designed and implemented on the model to simulate the prototype turret mooring system. Results show that the mooring location significantly affects the vertical motions and accelerations of the vessel. Astern turrets were found to produce higher heave and pitch than other locations tested. Although turrets positioned close to the longitudinal center of gravity produced the lowest overall motions, it is suggested that turret position forward of midships be preferred, as it provides a balance between lowering vertical motions and improving weathervaning characteristics.

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