Cost Reduction and Quality Improvement in 3D Marine Seismic Surveys using local tidal conditions

1998 ◽  
Author(s):  
Sotiris Kapotas ◽  
Claude Bordenave
Keyword(s):  
Quality Improvement ◽  
Cost Reduction ◽  
Seismic Surveys ◽  
Marine Seismic

RIVOLI-1 GAS DISCOVERY — EXMOUTH SUB-BASIN, WESTERN AUSTRALIA

1992 ◽  
Vol 32 (1) ◽  
pp. 94
Author(s):  
Philip J. Lawry ◽  
Paul A. Carter
Keyword(s):  
Seismic Data ◽  
Joint Venture ◽  
Depositional Environments ◽  
Geochemical Analysis ◽  
Seismic Surveys ◽  
Range Type ◽  
Exmouth Gulf ◽  
Marine Seismic ◽  
Gas Bearing ◽  
Made In

Offshore exploration in the Exmouth Gulf commenced with seismic surveys during the early 1960s and resulted in the first well Bundegi-1 being drilled in 1978. This well, situated on the Rivoli-Bundegi Trend, encountered an interpreted residual hydrocarbon zone in the Birdrong Sandstone, an 18 m untested hydrocarbon zone in the Learmonth Formation, and tight, possibly gas bearing sandstones in the Mungaroo Formation.Modern shallow-water marine seismic data acquired by the EP 325 Joint Venture during surveys in 1987 and 1988 allowed accurate mapping of the basal Cretaceous section and the distribution of the Birdrong Sandstone. Complex structuring in the Jurassic and Triassic section was also resolved with the modern data.The Rivoli gas discovery, approximately 4.5 km northeast of Bundegi-1, was made in August 1989, with the intersection of a 10.5 m hydrocarbon column consisting mainly of gas but with a very thin oil leg (0.2 m). The Birdrong Sandstone reservoir comprises 10 m of fluvial sandstones overlain by 7 m of marginal marine sandstones and provides an important calibration point for depositional environments in this unit. The Rivoli gas pool occurs in a simple, downthrown anticline sealed by Winning Group shales. Geochemical analysis of oil extracted from core, suggests an earlier charge of 'Rough Range-type' oil, possibly generated from pre-Jurassic source rocks.Several prospects and a variety of play types are recognised and considerable exploration potential remains to be tested along the Rivoli-Bundegi Trend.

Cost reduction and quality improvement: It takes two to tango

2000 ◽  
Vol 28 (2) ◽  
pp. 581-583 ◽  
Author(s):  
Peter Pronovost ◽  
Derek C. Angus
Keyword(s):  
Quality Improvement ◽  
Cost Reduction

scholarly journals Effect of Electrical Energy on the Manufacturing Setup Cost Reduction, Transportation Discounts, and Process Quality Improvement in a Two-Echelon Supply Chain Management under a Service-Level Constraint

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3733 ◽  
Author(s):  
Irfanullah Khan ◽  
Jihed Jemai ◽  
Han Lim ◽  
Biswajit Sarkar
Keyword(s):  
Supply Chain ◽  
Quality Improvement ◽  
Energy Consumption ◽  
Cost Reduction ◽  
Electrical Energy ◽  
Service Level ◽  
Chain Model ◽  
Electrical Energy Consumption ◽  
Setup Cost ◽  
Setup Cost Reduction

The need for efficient electrical energy consumption has greatly expanded in the process industries. In this paper, efforts are made to recognize the electrical energy consumption in a two-echelon supply chain model with a stochastic lead-time demand and imperfect production, while considering the distribution free approach. The initial investments are made for quality improvement and setup cost reduction, which ultimately reduce electrical energy consumption. The inspection costs are considered in order to ensure the good qualities of the product. Centralized and decentralized strategies are used to analyze the proposed supply chain model. The main objective of this study is to reduce the overall cost through efficient electrical energy consumption in supply chain management by optimizing the lot size, the number of shipments, the setup cost, and the failure rate. A quantity-based transportation discount policy is applied to reduce the expected annual costs, and a service-level constraint is incorporated for the buyer to avoid a stockout situation. The impact of the decision variables on the expected total costs is analyzed, and sensitivity analysis is carried out. The results show a significant reduction in overall cost, with quality improvement and setup cost reduction ultimately reducing electrical energy consumption.

scholarly journals Neotectonics of Southeast Jamaica Derived From Marine Seismic Surveys and Gravity Cores

Tectonics ◽  
2019 ◽  
Vol 38 (11) ◽  
pp. 4010-4026 ◽  
Author(s):  
Vanshan Wright ◽  
Matthew Hornbach ◽  
Lyndon Brown ◽  
Cecilia McHugh ◽  
Simon Mitchell
Keyword(s):  
Seismic Surveys ◽  
Marine Seismic

scholarly journals Deep learning for low-frequency extrapolation from multioffset seismic data

Geophysics ◽  
2019 ◽  
Vol 84 (6) ◽  
pp. R989-R1001 ◽  
Author(s):  
Oleg Ovcharenko ◽  
Vladimir Kazei ◽  
Mahesh Kalita ◽  
Daniel Peter ◽  
Tariq Alkhalifah
Keyword(s):  
Deep Learning ◽  
Seismic Data ◽  
Signal To Noise Ratio ◽  
Waveform Inversion ◽  
Low Frequency ◽  
Low Frequencies ◽  
Seismic Surveys ◽  
Full Waveform ◽  
Frequency Components ◽  
Marine Seismic

Low-frequency seismic data are crucial for convergence of full-waveform inversion (FWI) to reliable subsurface properties. However, it is challenging to acquire field data with an appropriate signal-to-noise ratio in the low-frequency part of the spectrum. We have extrapolated low-frequency data from the respective higher frequency components of the seismic wavefield by using deep learning. Through wavenumber analysis, we find that extrapolation per shot gather has broader applicability than per-trace extrapolation. We numerically simulate marine seismic surveys for random subsurface models and train a deep convolutional neural network to derive a mapping between high and low frequencies. The trained network is then tested on sections from the BP and SEAM Phase I benchmark models. Our results indicate that we are able to recover 0.25 Hz data from the 2 to 4.5 Hz frequencies. We also determine that the extrapolated data are accurate enough for FWI application.

scholarly journals VESS6. Healthcare Delivery Redesign for EVAR Leads to Quality Improvement and Cost Reduction

2014 ◽  
Vol 59 (6) ◽  
pp. 6S
Author(s):  
Courtney J. Warner ◽  
Richard J. Powell ◽  
Alexander J. Horvath ◽  
Jesse A. Columbo ◽  
Teri R. Walsh ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Cost Reduction ◽  
Healthcare Delivery

scholarly journals Airgun blasts used in marine seismic surveys have limited effects on mortality, and no sublethal effects on behaviour or gene expression, in the copepod Calanus finmarchicus

2019 ◽  
Vol 76 (7) ◽  
pp. 2033-2044 ◽  
Author(s):  
David M Fields ◽  
Nils Olav Handegard ◽  
John Dalen ◽  
Christiane Eichner ◽  
Ketil Malde ◽  
...  
Keyword(s):  
Escape Response ◽  
Field Experiments ◽  
Sublethal Effects ◽  
Low Frequency ◽  
Calanus Finmarchicus ◽  
Sensory Threshold ◽  
Seismic Surveys ◽  
Commercially Important ◽  
Or Gene ◽  
Marine Seismic

Abstract Seismic surveys use airguns that emit low frequency high magnitude sound to detect subsea resources and to map seabed geology. The effect of seismic blasts on Calanus spp., a key food source for commercially important fish, was assessed in field experiments. Immediate mortality of copepods was significantly different from controls at distances of 5 m or less from the airguns. Mortality 1 week after the airgun blast was significantly higher—by 9% relative to controls—in the copepods placed 10 m from the airgun blast but was not significantly different from the controls at a distance of 20 m from the airgun blast. The increase in mortality—relative to controls—did not exceed 30% at any distance from the airgun blast. Only two genes changed in response to the airgun blast; however, their function is unknown. There were no sublethal effects of the seismic blasts on the escape performance or the sensory threshold needed to initiate an escape response at any of the distances from the airgun blast that were tested. Results from these experiments suggest that seismic blasts have limited effects on the mortality or escape response of Calanus sp. within 10 m of the blast and no measurable impact at greater distances.

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