Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study

2016 ◽  
Vol 50 (1) ◽  
pp. 125-137 ◽  
Author(s):  
Tongtao Wang ◽  
Chunhe Yang ◽  
Jianjun Li ◽  
Jinlong Li ◽  
Xilin Shi ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Gas Storage ◽  
Salt Cavern

Consequence Analysis of Jet Fire Accidents Occurred in Salt Cavern Natural Gas Storage: Hazard Distance and its Influence Factors

2014 ◽  
Vol 1008-1009 ◽  
pp. 346-355
Author(s):  
Qi Lin Feng ◽  
Hao Cai ◽  
Zhi Long Chen ◽  
Dong Jun Guo ◽  
Yin Ma
Keyword(s):  
Natural Gas ◽  
Storage System ◽  
Influence Factors ◽  
Energy Storage System ◽  
Gas Storage ◽  
Operating Pressure ◽  
Natural Gas Storage ◽  
Salt Cavern ◽  
Salt Caverns

Natural gas storages in salt caverns are receiving an increasingly important role in energy storage system of many countries. This study focuses on analyzing the consequence of jet fire associated with natural gas storages in salt caverns. A widely used software, ALOHA, was adopted as simulation tool. The reliability of ALOHA was validated by comparing the simulated results with the field data observed in real accidents and the values calculated by a simple model presented in a previous study. The China's first natural gas storage in salt cavern, Jintan natural gas storage, was selected for case study. The case study reveals that the hazard distance of jet fire decreased with the increase of pipeline length, as well as the decrease of pipeline diameter and operating pressure.

scholarly journals Determination of the maximum allowable gas pressure for an underground gas storage salt cavern – A case study of Jintan, China

2019 ◽  
Vol 11 (2) ◽  
pp. 251-262 ◽  
Author(s):  
Tongtao Wang ◽  
Jianjun Li ◽  
Gang Jing ◽  
Qingqing Zhang ◽  
Chunhe Yang ◽  
...  
Keyword(s):  
Gas Storage ◽  
Gas Pressure ◽  
Underground Gas Storage ◽  
Salt Cavern

Feasibility analysis of salt cavern gas storage in extremely deep formation: A case study in China

2021 ◽  
pp. 103649
Author(s):  
Kai Zhao ◽  
Yuanxi Liu ◽  
Yinping Li ◽  
Hongling Ma ◽  
Wei Hou ◽  
...  
Keyword(s):  
Gas Storage ◽  
Feasibility Analysis ◽  
Salt Cavern ◽  
Salt Cavern Gas Storage

Underground seasonal storage of gas: testing numerical modelling tools with application to i) a deep aquifer-layer, and ii) salt caverns.

2020 ◽  
Author(s):  
Francesca Silverii ◽  
Djamil Al-Halbouni ◽  
Magdalena Stefanova Vassileva ◽  
Gudrun Richter ◽  
Rongjiang Wang ◽  
...  
Keyword(s):  
Stress State ◽  
Pore Pressure ◽  
Gas Storage ◽  
Physical Parameters ◽  
Elastic Model ◽  
Salt Cavern ◽  
The Stability ◽  
Salt Caverns ◽  
Storage Facilities

<p>Within the framework of the SECURE project, we test modeling techniques used for natural geothermal and volcanic reservoirs and apply them to anthropic underground gas storage facilities. These systems indeed share similar mechanics and physical properties, however gas reservoirs are often extensively monitored, and better imaged. In order to manage fluctuations between gas supply and demand, natural gas can be temporarily stored in different underground storage facilities, such as depleted gas/oil fields, natural aquifers, and salt cavern formations. When properly monitored during storage and withdrawal (production) of gas, these systems provide a unique opportunity to investigate how reservoirs evolve at different time scales, modify the surrounding stress state, produce deformation coupled with diffusion processes, and possibly induce/trigger earthquakes on nearby faults.</p><p>In the first case study we addressed within the framework of SECURE project, we take advantage of well constrained reservoir geometry and physical parameters, records of gas injection/production rates, pore pressure variations, and a local seismic catalog at a gas reservoir in Spain. We implement a poro-elastic model to simulate pressure temporal variations, estimate related stress-state variations, and study eventual relationship with small recorded seismic events. The model is based the software POEL by Wang et al., (2003), a semi-analytical physics-based numerical scheme which allows the computation of transient and steady-state solutions in response to pore-pressure variations. Being 2D axisymmetric, POEL drastically simplify the geometry of the reservoir, but it is particularly suitable to link observables such as pressure variations within the reservoir with the physical/mechanical processes occurring in the surroundings.</p><p>In the second case study we address the stability condition for salt caverns which has been excavated for salt mining purposes. We make use of 2D discrete-element geomechanical models to compare numerical simulation results with field observations in terms of surface subsidence. With this numerical model we consider different pressure conditions for the fluid (brine) filling the cavity, and return different scenarios for the stability of a salt cavern. Such modeling effort aims at improving our understanding of middle-to-long term stability conditions, for those cavities that have been dismissed after anthropic operations such as salt extraction, but also seasonal gas storage.</p>

Softening model for failure analysis of insoluble interlayers during salt cavern leaching for natural gas storage

2018 ◽  
Vol 13 (4) ◽  
pp. 801-816 ◽  
Author(s):  
Xilin Shi ◽  
Wei Liu ◽  
Jie Chen ◽  
Deyi Jiang ◽  
Fei Wu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Failure Analysis ◽  
Gas Storage ◽  
Natural Gas Storage ◽  
Salt Cavern

Failure Analysis Case Study of a 1.5 Meter Space Flex Harness

2017 ◽  
Author(s):  
Erick Kim ◽  
Kamjou Mansour ◽  
Gil Garteiz ◽  
Javeck Verdugo ◽  
Ryan Ross ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Failure Modes ◽  
Field Of View ◽  
Area Of Interest ◽  
Air Stream ◽  
Novel Method ◽  
Temperature Controlled ◽  
Non Destructive ◽  
Failure Site

Abstract This paper presents the failure analysis on a 1.5m flex harness for a space flight instrument that exhibited two failure modes: global isolation resistances between all adjacent traces measured tens of milliohm and lower resistance on the order of 1 kiloohm was observed on several pins. It shows a novel method using a temperature controlled air stream while monitoring isolation resistance to identify a general area of interest of a low isolation resistance failure. The paper explains how isolation resistance measurements were taken and details the steps taken in both destructive and non-destructive analyses. In theory, infrared hotspot could have been completed along the length of the flex harness to locate the failure site. However, with a field of view of approximately 5 x 5 cm, this technique would have been time prohibitive.

Failure Analysis of CDM-ESD Damage in a GaAs RFIC

2000 ◽  
Author(s):  
Amy Poe ◽  
Steve Brockett ◽  
Tony Rubalcava
Keyword(s):  
Radio Frequency ◽  
Failure Analysis ◽  
Integrated Circuit ◽  
Production Test ◽  
Analysis Techniques ◽  
Device Model ◽  
Charged Device ◽  
Subsequent Failure

Abstract The intent of this work is to demonstrate the importance of charged device model (CDM) ESD testing and characterization by presenting a case study of a situation in which CDM testing proved invaluable in establishing the reliability of a GaAs radio frequency integrated circuit (RFIC). The problem originated when a sample of passing devices was retested to the final production test. Nine of the 200 sampled devices failed the retest, thus placing the reliability of all of the devices in question. The subsequent failure analysis indicated that the devices failed due to a short on one of two capacitors, bringing into question the reliability of the dielectric. Previous ESD characterization of the part had shown that a certain resistor was likely to fail at thresholds well below the level at which any capacitors were damaged. This paper will discuss the failure analysis techniques which were used and the testing performed to verify the failures were actually due to ESD, and not caused by weak capacitors.

Advanced IR-OBIRCH Analysis Technique for High Isb Failure Analysis

2010 ◽  
Author(s):  
Kuo Hsiung Chen ◽  
Wen Sheng Wu ◽  
Yu Hsiang Shu ◽  
Jian Chan Lin
Keyword(s):  
Failure Analysis ◽  
Failure Mechanisms ◽  
Fault Localization ◽  
Resistance Change ◽  
The Real ◽  
Analysis Techniques ◽  
Analysis Technique ◽  
Leakage Failure ◽  
Failure Site

Abstract IR-OBIRCH (Infrared Ray – Optical Beam Induced Resistance Change) is one of the main failure analysis techniques [1] [2] [3] [4]. It is a useful tool to do fault localization on leakage failure cases such as poor Via or contact connection, FEoL or BEoL pattern bridge, and etc. But the real failure sites associated with the above failure mechanisms are not always found at the OBIRCH spot locations. Sometimes the real failure site is far away from the OBIRCH spot and it will result in inconclusive PFA Analysis. Finding the real failure site is what matters the most for fault localization detection. In this paper, we will introduce one case using deep sub-micron process generation which suffers serious high Isb current at wafer donut region. In this case study a BEoL Via poor connection is found far away from the OBIRCH spots. This implies that layout tracing skill and relation investigation among OBIRCH spots are needed for successful failure analysis.

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