Well Data Acquisition Strategies

2000 ◽  
Author(s):  
A. Louis ◽  
C. Boehm ◽  
J. Sancho ◽  
S. Carlin ◽  
R. Cerri ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Acquisition Strategies ◽  
Well Data

scholarly journals An Adaptive Genetic Algorithm of Adjusting Sensor Acquisition Frequency

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 990 ◽  
Author(s):  
Feng Chen ◽  
Shouzhi Xu ◽  
Ying Zhao ◽  
Hui Zhang
Keyword(s):  
Genetic Algorithm ◽  
Data Acquisition ◽  
Reducing Power ◽  
Sensor Nodes ◽  
Monitoring Data ◽  
Adaptive Genetic Algorithm ◽  
Environment Monitoring ◽  
Wireless Sensor Nodes ◽  
Acquisition Strategies

Portable meteorological stations are widely applied in environment monitoring systems, but they are always limited in power-supplying due to no cable power, especially in long-term monitoring scenarios. Reducing power consumption by adjusting a suitable frequency of sensor acquisition is very important for wireless sensor nodes. The regularity of historical environment data from a monitoring system is analyzed, and then an optimization model of an adaptive genetic algorithm for environment monitoring data acquisition strategies is proposed to lessen sampling frequency. According to the historical characteristics, the algorithm dynamically changes the recent data acquisition frequency so as to collect data with a smaller acquisition frequency, which will reduce the energy consumption of the sensor. Experiment results in a practical environment show that the algorithm can greatly reduce the acquisition frequency, and can obtain the environment monitoring data changing curve with less error compared with the high-frequency acquisition of fixed frequency.

scholarly journals Comparison of Data Acquisition Strategies on Quadrupole Ion Trap Instrumentation for Shotgun Proteomics

2014 ◽  
Vol 25 (12) ◽  
pp. 2048-2059 ◽  
Author(s):  
Jesse D. Canterbury ◽  
Gennifer E. Merrihew ◽  
Michael J. MacCoss ◽  
David R. Goodlett ◽  
Scott A. Shaffer
Keyword(s):  
Data Acquisition ◽  
Ion Trap ◽  
Shotgun Proteomics ◽  
Quadrupole Ion Trap ◽  
Acquisition Strategies

scholarly journals Alternative LC–MS/MS Platforms and Data Acquisition Strategies for Proteomic Genotyping of Human Hair Shafts

2021 ◽  
Author(s):  
Zachary C. Goecker ◽  
Kevin M. Legg ◽  
Michelle R. Salemi ◽  
Anthony W. Herren ◽  
Brett S. Phinney ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Human Hair ◽  
Acquisition Strategies ◽  
Hair Shafts

Advances in Cased Hole Acoustic Slowness Measurements and Its Application in a Depleted Reservoir Drilled with Highly Inclined Well: A Case Study from Offshore Malaysia

2021 ◽  
Author(s):  
M. Amin C. A. Razak ◽  
Ayham Ashqar ◽  
Saikat Das ◽  
Ahmad Izzuddin B. Yusof ◽  
Arie Purba Tata ◽  
...  
Keyword(s):  
Data Quality ◽  
Data Acquisition ◽  
Low Frequency ◽  
Flexural Wave ◽  
Bond Quality ◽  
Acoustic Data ◽  
Challenging Environment ◽  
Open Hole ◽  
Well Data ◽  
Cement Bond Quality

Abstract Acquiring acoustic slowness data in open & cased hole and a reliable cement bond log in one run without jeopardising data quality or increasing rig time is desired for fast and optimize data acquisition. This paper reviews the steps taken to ensure acoustic slowness and cement bond data acquisition fulfils the objective, while minimising the cost in an offshore challenging environment for formations with variable acoustic velocities that could be masked by strong casing arrivals. Crossed dipole acoustic logging is typically preferred to acquire within open hole environment for best quality signal. However, due to drilling challenges this could not be done in the subject well. Data was acquired in 6in open hole and 7" liner (8.5 in Open hole behind) cased hole section together in one run. Shear slowness in slow formation requires propagation of the low frequency dipole flexural wave whereas compressional slowness acquisition and cement bond evaluation requires high frequency monopole data. An improved understanding of cased-hole acoustic modes allowed developing the ability to transmit acoustic energies at optimal frequencies in order to acquire formation slowness concurrently with cement bond. Acoustic data quality in cased hole is dependent on cement bond quality. Poor bonding or presence of fluid between casing and the formation inserts noise in the data by damping the acoustic signal. Hence, understanding of the cement bond quality is critical in interpreting the cased hole acoustic data. The low amplitude of the compressional first arrival indicated the presence of cement bonded with the casing. Absence of casing ringing signal at the beginning and presence of strong formation signal in the VDL indicated good bonding of cement with formation. Filtration of the cased hole acquired semblances were necessary to remove the casing and fluids noises. Acquired data shows good coherency and continuous compressional and shear slowness's were extracted from the good quality semblances. This integrated strategy to acquire the formation slowness and to evaluate the cement bond quality and top of cement allowed meeting all objectives with one tool in single run. The risk of casing waves that could have masked the formation slowness signal was mitigated by transmitting acoustic energies at optimal frequencies with wider bandwidth followed by the semblance processing. The effects of borehole ovality, tool centralization, or casing centralization on waveform propagation were studied to supplement the interpretation. The first times strategic logging application in PETRONAS allowed time and cost saving and fulfilled all data acquisition plan. Data quality assurance and decision tree allowed drafting a workflow to assure data quality. This solution showed importance of smart planning to maximise advanced tools capabilities to acquire acoustic slowness data and cement evaluation in single run in offshore challenging environment.

Cryo-EM Performance Testing of Hardware and Data Acquisition Strategies

Microscopy ◽  
2021 ◽  
Author(s):  
Radostin Danev ◽  
Haruaki Yanagisawa ◽  
Masahide Kikkawa
Keyword(s):  
Data Acquisition ◽  
Performance Testing ◽  
Test Sample ◽  
Critical Parameters ◽  
Site Specific ◽  
Cryo Electron Microscopy ◽  
Beam Image ◽  
Acquisition Strategies ◽  
Limited Experience ◽  
Coma Aberration

Abstract The increasing popularity and adoption rate of cryo-electron microscopy is evidenced by a growing number of new microscope installations around the world. The quality and reliability of the instruments improved dramatically in recent years, but site-specific issues or unnoticed problems during installation could undermine productivity. Newcomers to the field may also have limited experience and/or low confidence in the capabilities of the equipment or their own skills. Therefore, it is recommended to perform an initial test of the complete cryo-EM workflow with an ‘easy’ test sample, such as apoferritin, before starting work with real and challenging samples. Analogous test experiments are also recommended for quantification of new data acquisition approaches or imaging hardware. Here, we present the results from our initial tests of a recently installed Krios G4 electron microscope equipped with two latest generation direct electron detector cameras—Gatan K3 and Falcon 4. Three beam-image shift-based data acquisition strategies were also tested. We detail the methodology and discuss the critical parameters and steps for performance testing. The two cameras performed equally, and the single and multi-shot per-hole acquisition schemes produced comparable results. We also evaluated the effects of environmental factors and optical flaws on data quality. Our results reaffirmed the exceptional performance of the software aberration correction in Relion in dealing with severe coma aberration. We hope that this work will help cryo-EM teams in their testing and troubleshooting of hardware and data collection approaches.

Integrated Mainframe/PC Approach for Well-Data-Acquisition Selection

1991 ◽  
Vol 43 (11) ◽  
pp. 1364-1367
Author(s):  
J.P. Sizer ◽  
M.A. Al-Khamees
Keyword(s):  
Data Acquisition ◽  
Well Data
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