Structural Health Monitoring of An Offshore Platform Trend of Corrosion and Marine Growth With Predictive Maintenance

2020 ◽  
Author(s):  
K. S. Suharto
Keyword(s):  
Structural Health Monitoring ◽  
Data Processing ◽  
Production Process ◽  
Health Monitoring ◽  
Oil And Gas ◽  
Gas Production ◽  
Offshore Platform ◽  
Offshore Platforms ◽  
Oil And Gas Production ◽  
Potential Failure

Nowadays, there are a lot of oil and gas exploration activities all over the world, especially offshore. Oil and gas production itself has many supporting factors in the production process, of which one of them is the offshore platform. Over time, the offshore platform will experience a degradation in strength from the initial design, therefore offshore platforms need to carry out appropriate inspection, maintenance and repair (IMR) programs so that the offshore platform does not reach critical conditions and disrupt the oil and gas production process, resulting in significant losses and not achieving the planned production rates. The offshore platform design is a combination of steel structure and other materials, methods, and loads that are initially worked at the port, such as wave loads, currents, and several other parameters such as gravity, wind, and earthquake. Most of the offshore platforms that currently exist (worldwide) were made in the period of oil investment that developed between 1970 and 1980, thus, the platform's age has now reached 40 to 50 years (El-Reedy, 2012). This research data based on a platform in the Makassar strait between the islands of Kalimantan and Sulawesi. The method used in this research is the platform's design, data observation, data analysis, data processing, and statistical multilinear regression analysis. This research is investigating the degradation trend of the offshore platform and predicting the future of potential failure because of corrosion and marine growth. After the platform encounters degradation over several years, it will decrease the service life before the degradation starts to matter. The results show after data processing that, offshore platforms encounter degradation over several years, and it is presented by a graph containing the condition trend over a multi-year condition because of corrosion and marine growth, and its effect towards unity check (UC) that define structure health. Unity check value produced from allowable stress versus capacity. In this research, structural health monitoring is predicting the potential failure of the platform towards its UC effect of corrosion and marine growth, with a max of the UC value is 0.8 because its a critical value. The failure of the structure possibly would have an affect on the cost-effectiveness. Therefore it is necessary to predict when the structure will fail so that the costs used are effective. Unfortunately, there is no core data for the environmental changes every year at the platform, so the model's equation does not include environmental conditions.

Experimental Study of Tsunami-Type Waves Impact on Soil near Foundation of Offshore Gravitational-Type Platforms

2015 ◽  
Vol 725-726 ◽  
pp. 306-316 ◽  
Author(s):  
Nikolay Dmitrievich Belyaev ◽  
Vladimir Valintinovich Lebedev ◽  
Anastasy Valerjevna Mishina ◽  
Igor Sergeevich Nudner ◽  
Konstantin Konstantinovich Semenov ◽  
...  
Keyword(s):  
Russian Federation ◽  
Oil And Gas ◽  
Gas Production ◽  
Wave Flow ◽  
Offshore Platforms ◽  
Sea Waves ◽  
Oil And Gas Production ◽  
Scour Holes ◽  
Foundation Block ◽  
The Government

The need to study the problem of seabed local scour near offshore platforms has arisen in Russian Federation in connection with the activation of oil and gas production from fields located in coastal areas of seas (in accordance with the Energy Strategy for the period up to 2030, approved by the Government of the Russian Federation on November 13, 2009, No1715-p). Operation of offshore platforms is characterized by a number of features: shallow water areas; severe storm conditions; large transverse dimensions of structures that cause waves diffraction; the variety of used structure forms; the way of platform mounting on the seabed. During platform operation in the shallow waters, its basement soil is under an intense impact of sea waves, currents, as well as jets from engine of coming and berthing ships. The structure disturbs the natural wave flow. Near the platform, flow velocity increases, there are vortexes breakaway from platform corner edges. Scour holes appear and progress near platform foundation. Their location and measure depend on the parameters of external impacts, on the water depth, on the shape and dimensions of the foundation block.

Effect of Joint Behavior on the Reassessment of Fixed Offshore Platforms in the Bay of Campeche, Mexico

2005 ◽  
Author(s):  
Partha Chakrabarti ◽  
Adinarayana Mukkamala ◽  
Ibrahim Abu-Odeh ◽  
Juan de Dios de la O. Rami´rez
Keyword(s):  
Fatigue Life ◽  
Service Life ◽  
Oil And Gas ◽  
Gas Production ◽  
Strength Analysis ◽  
Offshore Platforms ◽  
Inspection Planning ◽  
Oil And Gas Production ◽  
Joint Flexibility ◽  
Joint Behavior

Pemex Exploration y Produccio´n owns and operates several fields in the Bay of Campeche, located in the south Gulf of Mexico, for oil and gas production. Many of these fixed offshore platforms were built during the 70s and 80s and have already exceeded their design service life. To meet the growing demand for oil and natural gas it was found economic to extend the service life for these platforms by at least another 15 to 30 years. To meet this extended service life, thorough and systematic reassessment studies need to be conducted leading to identification of any structural weakness and possible locations of fatigue problems. To extend the fatigue life of the welded joints, inspections are required to be performed according to a risk based inspection planning procedure. As a part of the reassessment study non-linear pushover and spectral fatigue analyses are conducted. The effect of joint behavior, viz. the local joint flexibility and strength, on the structural ultimate capacity and fatigue life is discussed in this paper. In conventional analysis the tubular joints are assumed to be rigid and the flexibility effects due to shell deformations are ignored. In this present paper, the effect of the joint behavior is included in the analysis and its implications on the results are discussed. For the ultimate strength analysis both API and MSL formulations for the load-deformation behavior of the joint are studied and compared. For the fatigue analyses, local joint flexibility modeling using Buitrago’s formulation is used. Results including and excluding these effects are compared. Effect of grouting of the joint is also studied. Comprehensive results of the study for a number of platforms, which cover the categories of Drilling, Production, Gathering and Habitation, are presented. The effects of local joint flexibility and joint strength on structural behavior have been recognized to be important in the recent publications of the recommended practices and the codes such as the API RP 2A. However, comprehensive discussions and the results of application of these aspects are rare in the published literature. This paper addresses these issues and presents the results of a large number of platforms of different configurations, indicates some noticeable trends and suggests some general conclusions.

Damage Detection in Offshore Platforms Using Vibration Information

1986 ◽  
Vol 108 (2) ◽  
pp. 97-106 ◽  
Author(s):  
F. Shahrivar ◽  
J. G. Bouwkamp
Keyword(s):  
Damage Detection ◽  
Oil And Gas ◽  
Gas Production ◽  
Offshore Platforms ◽  
Oil And Gas Production ◽  
Mass Eccentricity ◽  
Detection Capabilities ◽  
Offshore Oil And Gas ◽  
Offshore Oil ◽  
Mass Increase

Damage detection based on changes in dynamic characteristics is considered for eight-legged k-braced steel offshore oil and gas production towers. Both experimental and analytical results are presented to improve damage detection capabilities. A 1/50th scale plastic model representing the structural system of a typical full-scale tower in 218 ft (66m) of water is used for the studies. Effects of severance of diagonal bracing members on selected vibration frequencies and mode shape parameters measurable at the deck are investigated. The effects of changes in deck mass, increase in jacket mass, and deck mass eccentricity on the selected parameters are also investigated and are shown to be different from the effects of damage.

scholarly journals OPTIMIZATION OF THE OIL AND GAS PRODUCTION PROCESS IN THE CONCEPT DIGITAL DEPOSITS

2021 ◽  
Vol 1 (1) ◽  
pp. 213-214
Author(s):  
Oleg Arsent'ev ◽  
Dmitriy Ivanov ◽  
Kristina Saharovskaya
Keyword(s):  
Production Process ◽  
Intelligent Systems ◽  
Oil And Gas ◽  
Digital Technologies ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Technological Processes ◽  
Quality Of Products

The possibilities of using digital technologies in oil and gas production within the framework of the "Digital Field" concept are considered, and it is determined that the introduction of intelligent systems in technological processes increases the volume and quality of products while reducing their cost.

scholarly journals Gas lift optimization in the oil and gas production process: a review of production challenges and optimization strategies

2020 ◽  
Vol 1 (2) ◽  
pp. 61
Author(s):  
Ikenna Tobechukwu Okorocha ◽  
Chuka Emmanuel Chinwuko ◽  
Chika Edith Mgbemena ◽  
Chinedum Ogonna Mgbemena
Keyword(s):  
Production Process ◽  
Oil And Gas ◽  
Gas Injection ◽  
Injection Rate ◽  
Gas Production ◽  
Optimization Techniques ◽  
Oil Well ◽  
Oil And Gas Production ◽  
Artificial Lift ◽  
Gas Lift

Gas Lift operation involves the injection of compressed gas into a low producing or non-performing well to maximize oil production. The oil produced from a gas lift well is a function of the gas injection rate. The optimal gas injection rate is achieved by optimization. However, the gas lift, which is an artificial lift process, has some drawbacks such as the deterioration of the oil well, incorrect production metering, instability of the gas compressor, and over injection of gas. This paper discusses the various optimization techniques for the gas lift in the Oil and Gas production process. A systematic literature search was conducted on four databases, namely Google Scholar, Scopus, IEE Explore and DOAJ, to identify papers that focused on Gas lift optimizations. The materials for this review were collected primarily via database searches. The major challenges associated with gas lift were identified, and the different optimization strategies available in the literature reviewed. The strategies reviewed were found to be based on artificial intelligence (AI) and machine learning (ML). The implementation of any of the optimization strategies for the gas lift will enhance profitability, reduce operational cost, and extend the life of the wells.

Sign in / Sign up

Export Citation Format

Share Document