scholarly journals DOA-based Localization Using Deep Learning for Wireless Seismic Acquisition

2021 ◽  
Author(s):  
Kabiru N. Aliyu ◽  
Saleh A. Alawsh ◽  
Ali H. Muqaibel ◽  
Suhail I. Al-Dharrab ◽  
Wessam Mesbah ◽  
...  
Keyword(s):  
Real Time ◽  
Oil And Gas ◽  
Beam Steering ◽  
Doa Estimation ◽  
Least Square ◽  
Interference Avoidance ◽  
Least Square Estimation ◽  
Gateway Node ◽  
Seismic Acquisition ◽  
Oil And Gas Companies

Abstract Oil and gas companies consider transforming conventional cable-based seismic acquisition to wireless acquisition as a promising step for cost and weight reduction in reservoir exploration. Wireless seismic acquisition requires large number of wireless geophone (WG) sensors to be deployed in the field. The locations of the WG sensors must be known when processing the collected data. The application of direction of arrival (DOA) estimation helps in localizing WGs and improves received signal level through beam steering and interference avoidance. Conventional DOA algorithms require high computational complexity which renders them inefficient for real-time response. In this paper, deep neural network (DNN) is proposed for DOA estimation of WGs at wireless gateway node (WGN) under different channel conditions. The estimated angle and corresponding coordinates of WGNs are used in least square estimation (LSE) to estimate the position of the WGs. The simulation results depict reasonable estimation and position accuracy in real-time.

2013 PESA industry review: exploration

2014 ◽  
Vol 54 (1) ◽  
pp. 431
Author(s):  
Rhodri Johns ◽  
Patrick Despland
Keyword(s):  
Oil And Gas ◽  
Fiscal Year ◽  
Oil And Gas Exploration ◽  
Seismic Acquisition ◽  
Gas Targets ◽  
Future Direction ◽  
Oil And Gas Companies ◽  
Western Australian ◽  
Conventional Oil ◽  
Exploration Activity

Exploration activity in Australia in 2013 occurred across a broad spectrum of conventional and unconventional plays. Competition for acreage was buoyant with large tracts of key onshore basins either licensed or under application. Offshore, there were new awards on the western Australian margin and in the Bight Basin off SA. Offshore 3D seismic acquisition was reduced from anomalously high levels in 2012. Onshore 2D seismic acquisition was at historic highs and onshore 3D was the most ever recorded. Overall drilling levels were maintained despite a decline offshore. Of 13 offshore wells drilled, six were discoveries. Sixty-nine exploration wells (excluding CSG wells) were drilled onshore. Fifty addressed conventional, and 19 were unconventional shale or basin-centered gas targets. Sixty of the 69 wells were drilled in the Cooper/Eromanga Basin where conventional oil and gas exploration yielded 11 oil and six gas discoveries. Drilling and fraccing campaigns in the Nappamerri Trough unconventional gas plays provided early encouraging results. 213 exploration and appraisal CSG wells were drilled in the CSG basins of Queensland and NSW. In Queensland a record total of 1,317 CSG wells were drilled in fiscal year 2012/2013. Shale gas exploration activity was increasingly focused on the Palaeozoic and Proterozoic Basins of Western, Central and Northern Australia with major oil and gas companies involved in joint ventures preparing for drilling in 2014. The results of these programmes will have an important bearing on the future direction of exploration in these plays.

scholarly journals Environmental Cost Reporting and Performance of Nigerian Oil and Gas Downstream

2021 ◽  
Vol 4 (2) ◽  
pp. 26-54
Author(s):  
Giami Isaac Baribefe
Keyword(s):  
Oil And Gas ◽  
Stock Exchange ◽  
Research Work ◽  
Least Square ◽  
Environmental Cost ◽  
Sales Volume ◽  
Return On Assets ◽  
Ordinary Least Square ◽  
And Performance ◽  
Oil And Gas Companies

This research work examined the relationship between environmental cost reporting and performance of Nigerian oil and gas downstream companies quoted on the Nigerian stock exchange for the period 2011 to 2020. The study adopted historical data design and census sampling techniques was used in studying the entire population. Four hypotheses were tested using multiple regression analyses with the help of ordinary least square and the findings revealed that, amount spent on waste management /remediation has a negative and insignificant relationship with growth in sales volume as well as return on asset. Amount spent on compensation also has negative and insignificant relationship with both growth in sales volume and return on assets. It was however recommended that oil and Gas companies continue to manage their waste and include community development in their decision making in line with global best practices to keep them socially acceptable as these will ensure a symbiotic relationship among the various stakeholders.

An integrated economic analysis of the oil and gas companies of Russia

2019 ◽  
Vol 18 (5) ◽  
pp. 925-943
Author(s):  
I.V. Filimonova ◽  
◽  
L.V. Eder ◽  
V.Yu. Nemov ◽  
M.V. Mishenin ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Oil And Gas ◽  
Oil And Gas Companies

Minerals as an object of accounting and economic security of the oil and gas company implementing the production sharing agreement

2020 ◽  
Vol 23 (11) ◽  
pp. 1291-1312
Author(s):  
N.V. Zyleva
Keyword(s):  
Oil And Gas ◽  
Economic Security ◽  
The State ◽  
Professional Judgment ◽  
Production Sharing ◽  
Security Service ◽  
Geological Information ◽  
Oil And Gas Companies ◽  
Mineral Reserves ◽  
Economic Risks

Subject. This article discusses the practice of ensuring the economic security of oil and gas companies operating under the terms of production sharing agreements, where minerals are the object of security. Objectives. The article aims to justify the need to apply professional judgment in the organization of reliable accounting of minerals, explored and extracted under the terms of the production sharing agreement implementation, to avoid various risks to the entity's economic security. Methods. For the study, I used the methods of deduction and modeling. Results. The article presents proposals to arrange accounting of intangible exploration assets (geological information on mineral reserves) and finished products (the part of the extracted minerals owned by the investor and the part owned by the State). Conclusions. As strategic minerals, oil and gas are the targets of various economic risks. Professionals familiar with the specifics of accounting operations in the implementation of the production sharing agreement should be prepared to prevent these risks. The results obtained can be used to design accounting policies and develop local regulations on the tasks and functions of the economic security service of the organization implementing the production sharing agreement.

Analyzing the figures of consolidated statement of cash flows of the world's biggest publicly traded oil and gas corporations

2020 ◽  
Vol 19 (6) ◽  
pp. 1101-1120
Author(s):  
O.V. Shimko
Keyword(s):  
Public Sector ◽  
Cash Flow ◽  
Oil And Gas ◽  
Cash Flows ◽  
Annual Reports ◽  
Capital Expenditures ◽  
Publicly Traded ◽  
The Public ◽  
Statement Of Cash Flows ◽  
Oil And Gas Companies

Subject. The article investigates key figures disclosed in consolidated cash flow statements of 25 leading publicly traded oil and gas companies from 2006 to 2018. Objectives. The focus is on determining the current level of values of the main components of consolidated statement of cash flows prepared by leading publicly traded oil and gas companies, identifying key trends within the studied period and factors that led to any transformation. Methods. The study draws on methods of comparative and financial-economic analysis, as well as generalization of materials of consolidated cash flow statements. Results. The comprehensive analysis of annual reports of 25 oil and gas companies enabled to determine changes in the key figures and their relation in the structure of consolidated cash flow statements in the public sector of the industry. It also established main factors that contributed to the changes. Conclusions. In the period under study, I revealed an increase in cash from operating activities; established that capital expenditures in the public sector of the industry show an overall upward trend and depend on the level of oil prices. The analysis demonstrated that even integrated companies’ upstream segment prevail in the capital expenditures structure. The study also unveiled an increase in dividend payments, which, most of the time, exceeded free cash flows thus increasing the debt burden.

Analyzing the liquidity ratios of the world's leading public oil and gas corporations

2020 ◽  
Vol 26 (7) ◽  
pp. 1571-1589 ◽  
Author(s):  
O.V. Shimko
Keyword(s):  
Public Sector ◽  
Oil And Gas ◽  
Comprehensive Analysis ◽  
Annual Reports ◽  
Main Factors ◽  
Economic Analyses ◽  
Oil And Gas Companies

Subject. This article explores the key liquidity figures of the twenty five largest public oil and gas companies between 2006 and 2018. Objectives. The article aims to determine the current values of the key liquidity figures of the largest public oil and gas companies, identify key trends in their changes within the study period, and identify the factors that have caused these changes. Methods. For the study, I used comparative, and financial and economic analyses, and generalization. Results. Based on a comprehensive analysis of the twenty five oil and gas companies' annual reports, the article identifies trends in the changes in the key liquidity indexes in the industry's public sector, and establishes the main factors that affected these changes. Conclusions and Relevance. The largest public oil and gas companies are able to maintain their own liquidity in times of crisis, even. The industry pays the most attention to increasing the instant liquidity ratios. The results of the study can be used to evaluate, forecast, and develop measures to enhance the liquidity of public oil and gas companies.

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