scholarly journals Monitoring and Diagnosis System of Downhole Tubing Leakage

2021 ◽  
Author(s):  
Yunpeng Yang ◽  
Jianchun Fan ◽  
Di Liu ◽  
Fanfan Ma
Keyword(s):  
Oil And Gas ◽  
Gas Production ◽  
Offshore Platforms ◽  
Gas Well ◽  
Oil And Gas Production ◽  
Diagnosis System ◽  
Monitoring And Diagnosis ◽  
Detection Technology ◽  
Threaded Joints ◽  
Leakage Monitoring

The downhole tubing in a gas well is affected by many factors such as high pressure erosion, gas lift operation, sand production at the bottom of the well and engineering construction, etc., which can easily lead to leakage of the threaded joints of the tubing and the pipe body, and the leaked natural gas will invade Annulus, making the annulus under pressure. The annular pressure caused by oil pipe leakage is a major safety hazard in oil and gas production. Therefore, the accurate diagnosis the degree of leakage of downhole tubing is of great significance to preventing the occurrence of production accidents effectively. To this end, a set of downhole tubing leak monitoring and diagnosis system has been developed by integrating fluid monitoring, acoustic wave detection and tracer detection technology, and the developed tubing leak monitoring and diagnosis system was used for leak detection tests on offshore platforms. The test results show that the developed tubing leakage monitoring and diagnosis system can meet the need of offshore gas well diagnosis, and realize the holographic diagnosis of the leakage degree of the downhole tubing without moving the downhole tubing string.

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.

scholarly journals The expansion of innovative activity on rise of oil production enterprises in Azerbaijan

2021 ◽  
pp. 1-7
Author(s):  
A. G. Huseynov ◽  
◽  
E. A. Huseynov ◽  
Keyword(s):  
Oil And Gas ◽  
Production Condition ◽  
Oil Production ◽  
Gas Production ◽  
Innovative Activity ◽  
Gas Well ◽  
Oil And Gas Production ◽  
Article Analysis ◽  
The Republic ◽  
Innovative Techniques

The article analysis the oil and gas production condition in the Republic on basis of statistical data of many years as well as the level of investment provision. The article estimates the structure of expenses on innovative techniques, the condition of exploitation of oil and gas boreholes, the implementation of geological and technological actions, the ways of exploitation methods as well as the methods of ledge effects and influence on extra oil production. It also shows up the reserves and ways of their rational usage. Keywords: innovative activity; geological and technological actions; oil and gas; well.

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 Life Cycle Assessment as a Tool of Eco-Efficiency of Oil And Gas Production Facilities

2019 ◽  
pp. 83-92
Author(s):  
T. M. Yatsyshyn
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Oil And Gas ◽  
Gas Production ◽  
Assessment Methodology ◽  
Life Cycle Assessment Methodology ◽  
Gas Well ◽  
Oil And Gas Production ◽  
Technological Processes ◽  
Production Facilities

Aiming at improving the eco-efficiency of the oil and gas industry, the author suggests the use of life cycle assessment methodology to study oil and gas production facilities as illustrated by the oil-and-gas well. The peculiarities of the research object are the complexity of technological processes and equipment and the multifactorial effects on the environment. The basic principles of the methodology of life cycle assessment have been analyzed. The author specifies the boundaries of the investigated system which includes all stages of the life cycle of an oil-and-gas well: site preparation, rigging up, well drilling, testing, rigging down, assembly of production equipment, well development, well operation, closing-in, well decommissioning. The inventory of single processes of the production system was carried out. It gives a possibility to identify incoming and outgoing elementary flows at each stage. The histograms to determine the power and diversity of incoming and outgoing flows have been built. The approximate duration of each stage is given. This duration makes it possible to estimate the exposure time of single processes and to identify the potential effects on the environment. The most resource-consuming stages have been established. They are drilling, rigging up, rigging down, and decommissioning of wells. Based on to the results of analytical studies of the outgoing flows, the stages with the greatest diversity and flow capacity are established. The potential risk of hazardous environmental emergencies during the life cycle of the investigated facility is determined. The obtained data give a possibility to start researching those processes and / or equipment with which there is intense movement of flows with significant effects on the environment, as well as to develop innovative technical solutions and improve technological processes to reduce the harmful effects on the environment. The conducted research determines a number of advantages of the life cycle assessment methodology for improving the indicators of eco-efficiency. The advantages include a systematic study of the effects of the activities, the multivariate analysis, the identification of the potential for the reduction of impacts and constant improvement throughout the life cycle.

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.

Perspective projects of placement of RES energy plants at the offshore structures and on them

2018 ◽  
Vol 1 (1) ◽  
pp. 35-45
Author(s):  
I. V. Dunichkin ◽  
O. I. Poddaeva ◽  
E. A. Suverina
Keyword(s):  
Energy Production ◽  
Power Plants ◽  
Oil And Gas ◽  
Renewable Energy Sources ◽  
Gas Production ◽  
Offshore Platforms ◽  
Oil And Gas Production ◽  
The Subject ◽  
Offshore Oil And Gas ◽  
Offshore Oil

In the scientific study, the offshore oil and gas production platforms were considered after the exhaustion of hydrocarbon reserves. An alternative to dismantling is the possibility of  refitting and retrofitting prospective structures for the function of energy production. The  general problem of determining the climatic offshore oil and gas fields is also considered. For the development of maritime infrastructure, a design development was added to  complement the functionality of offshore platforms for energy production. The chosen methods for developing.The subject of the study: the subject of the study are offshore oil and gas production platforms, marine power plants for power generation and bioenergy objects.Objectives: the purpose of the study is to identify options for the use of offshore hydraulic installations in marine offshore platforms for generating energy and locating bioenergetic facilities.Materials and methods: in the course of the work, various options for the use of offshore platforms in the field of renewable energy sources are considered, without the need for disposal of objects.Results: as a result of the work, the project of the experimental energy complex of bioreactor and biocultivator EECBB and RES.Conclusions: the energy sector has the opportunity to be environmentally friendly and rely on the principles of sustainable development.

scholarly journals NECESSITY OF IMPROVEMENT OF COMPLEX GAS WELL REPAIR WORKS CLASSIFICATION IN CURRENT CONDITIONS OF WELLS OPERATION

2016 ◽  
pp. 40-44
Author(s):  
Yu. V. Vaganov
Keyword(s):  
Oil And Gas ◽  
Gas Production ◽  
Gas Condensate ◽  
Gas Well ◽  
Oil And Gas Production ◽  
Current Structure ◽  
Water Influx ◽  
Further Development ◽  
Complex Well

It is shown that the changed conditions of gas and gas-condensate fields operation entailed an increase in complexity of well repairs using coiltubing technologies. However, the methods developed for wells recovery in terms of emergency-refurbishment and water-influx restriction works are not provided for by the existing classification of complex well repairs which makes difficult to justify the length of repair works and, accordingly, their cost. The suggested amendments to the current structure of wells repair types promote further development of technologies of well workover in the conditions of oil and gas production decline .

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