scholarly journals Investigation of the lognormality of offshore oil and gas lease bidding data: Cramer-von Mises one-sample test

1978 ◽  
Author(s):  
F Genter ◽  
L Bruckner
Keyword(s):  
Oil And Gas ◽  
Sample Test ◽  
Offshore Oil And Gas ◽  
Von Mises ◽  
Offshore Oil ◽  
Cramer Von Mises

Understanding the Impacts of Backpressure & Risk Analysis of Different Gas Hydrate Blockage Scenarios on the Integrity of Subsea Flowlines

2021 ◽  
Author(s):  
Ebuka Umeh ◽  
Maurice Ephraim ◽  
Nitonye Samson
Keyword(s):  
Oil And Gas ◽  
Hydrate Formation ◽  
Operating Conditions ◽  
Von Mises Stress ◽  
Hydrate Deposition ◽  
Design Values ◽  
Offshore Oil And Gas ◽  
Von Mises ◽  
Offshore Oil ◽  
The Impact

Abstract Offshore oil and gas pipelines are subjected to high pressure and high temperature (HP/HT) from the inner hydrocarbon content during operation. Both the rise in temperature and internal pressure may cause longitudinal expansion of the pipeline. This expansion is restrained or semi-restrained by the pipe end devices and the soil which results in build-up of compression stresses in the pipe wall. These pipelines are also exposed to so many familiar and unfamiliar forces related to static, dynamic and environmental forces. This study presents a thorough review of various sources from literature on the integrity challenges of subsea flowlines and pipelines amid challenging operating conditions especially with regards to flow assurance. This paper evaluates the impact of hydrate deposition and agitation on the overall integrity of the subsea flowlines, riser-base and fitting e.g. elbows, valves e.t.c. A bow tie model was developed to determine the threats, causes, consequences, the top event and the impending hydrates that are to be designed and cause blockage and failure. Stress analysis were done with finite element tools which are ANSYS and Autodesk INVENTOR with only the hoop, Von Mises stress and the corresponding back pressure that occurred with the scenario of 0, 10,30,50,70,90 and 100% blockage of flowlines being analyzed and taking the 0% or null blockage as the pilot case with no hydrate formation. The result gotten from both results were validated with hand calculation with excel and the initial design values for the stress values before the initial operation of the wells after the first commissioning. In addition, HAZOP was done to understand the inherent risk involved in all the cases under study and results gotten would serve as a tool of precautions to operators and stakeholders in period of adversity when facing similar scenario.

Drilling and Service Contracts in Offshore Oil and Gas Operations

1973 ◽  
Vol 11 (3) ◽  
pp. 480
Author(s):  
J. M. Killey
Keyword(s):  
Oil And Gas ◽  
Oil Industry ◽  
Offshore Drilling ◽  
Oil Companies ◽  
Drilling Rig ◽  
Service Contracts ◽  
Oil And Gas Operations ◽  
Offshore Oil And Gas ◽  
Offshore Oil ◽  
Offshore Operations

As onshore oil and gas deposits are becoming more difficult to locate, and as the world demands for energy continue to increase at an alarming rate, oil companies are channeling much of their exploration activities towards offshore operations, and in particular, towards operations centered off Canada's coast lines. Because of the environment, offshore drilling presents problems which are novel to the onshore-geared oil industry. J. M. Killey discusses in detail many of the considerations involved in drafting the offshore drilling contract, concentrating on problems such as the liability of the various parties; costs; scheduling; pollution; conflict of laws; etc. Similarly, he discusses service contracts (such as supply boat charters; towing services; helicopter services; etc.^ which are necessity to the operation of an offshore drilling rig. To complement his paper, the author has included number of appendices which list the various considerations lawyer must keep in mind when drafting contracts for offshore operations.

Virtual emulation laboratories for teaching offshore oil and gas engineering

2018 ◽  
Vol 26 (5) ◽  
pp. 1603-1613 ◽  
Author(s):  
Hongjun Zhu ◽  
Zhi Yang ◽  
Youming Xiong ◽  
Yongyou Wang ◽  
Lu Kang
Keyword(s):  
Oil And Gas ◽  
Offshore Oil And Gas ◽  
Offshore Oil
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