The nimble node — Million-channel land recording systems have arrived

2019 ◽  
Vol 38 (9) ◽  
pp. 706-714 ◽  
Author(s):  
Ted Manning ◽  
Dinara Ablyazina ◽  
John Quigley
Keyword(s):  
Seismic Data ◽  
Capital Expenditure ◽  
Field Tests ◽  
Environmental Footprint ◽  
Channel System ◽  
Seismic Surveys ◽  
Hot Weather ◽  
Nodal System ◽  
Sampling In Space ◽  
Operational Expenditure

A new nodal land acquisition system is being developed with successful field tests in both cold- and hot-weather settings and is being compared against several existing industry acquisition systems. This nodal system differs from others in that it has been designed to deliver affordable high-quality seismic data with the lightest, smallest, and lowest-cost seismic channel system in the industry by significant margins. There are three main drivers for this innovation. First, it will significantly improve data quality by reducing the current cost barriers to acquiring high-density seismic surveys (i.e., full sampling in space, azimuth, and offset). Second, it will reduce the environmental footprint of land operations (less line clearance required). Third, it will improve the safety of land operations (fewer people and vehicles required per channel). All three have been achieved by dramatically reducing both the capital expenditure to build a one-million-channel highly portable recording system and the operational expenditure needed to operate such a system in the field.

scholarly journals ANALISIS KINERJA KEUANGAN PADA DINAS BINA MARGA DAN SUMBER DAYA AIR KABUPATEN BANJAR

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Fariz Syahidi
Keyword(s):  
Financial Management ◽  
Capital Expenditure ◽  
Infrastructure Development ◽  
Analysis Method ◽  
Efficiency Ratio ◽  
Average Performance ◽  
Performance Targets ◽  
Capital Spending ◽  
Operational Expenditure ◽  
Very High

Abstract: The purpose of this study was to determine the effectiveness, efficiency and growth on Highways and Water Resources Office of Banjar regency. The data analysis method was descriptive quantitative. The results showed that the average performance of the financial management of the efficiency ratio in 2013, 2014, 2015 was not efficient, due to the lack of savings in indirect expenditures or the payment of salaries of civil servants. Meanwhile, the effectiveness ratio in 2014 and 2015 were effective but in 2013 was quite effective. The effectiveness achievement was based on employees’ performance to realize performance targets and financial targets. The growth of revenue, capital expenditure and operational expenditure showed high to very high results. It means that the development growth increased every year, especially in capital spending as a means to financed infrastructure development for roads, bridges and maintenance. Keywords: efficiency, effectiveness, growth Abstrak: Tujuan penelitian ini adalah untuk mengetahui nilai efektifitas, efisiensi dan pertumbuhan pada Dinas Bina Marga dan Sumber Daya Air Kabupaten Ban-jar. Metode analisis data dalam penelitian ini adalah kuantitatif deskriptif. Hasil penelitian menunjukkan bahwa rata-rata kinerja pengelolaan keuangan pada rasio efisiensi tahun 2013, 2014 dan 2015 tidak efisien. Hal ini dikarenakan tidak adanya penghematan pada belanja tidak langsung atau pembayaran gaji PNS. Pa-da rasio efektifitas tahun 2014 dan 2015 efektivitas dan tahun 2013 cukup efekti-vitas. Pencapaian hasil efektifitas didasarkan pada hasil kinerja pegawai yang mampu merealisasikan target kinerja dan target keuangan. Pertumbuhan PAD, be-lanja modal dan belanja operasional menunjukan hasil yang tinggi hingga sangat tinggi. Hal ini berarti dari tahun ke tahun pertumbuhan pembangunan mengalami peningkatan terutama pada belanja modal sebagai sarana untuk pembiayaan pem-bangunan infrastruktur pembangunan jalan, jembatan dan pemeliharaannya..Keywords: efisiensi, efektifitas, pertumbuhan

scholarly journals KINERJA KEUANGAN DAERAH PASCA PERALIHAN BEA PEROLEHAN HAK ATAS TANAH DAN BANGUNAN

2017 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Juli Juli Juli
Keyword(s):  
Local Government ◽  
Financial Performance ◽  
Local Governments ◽  
Central Government ◽  
Capital Expenditure ◽  
Local Taxes ◽  
Paired Samples ◽  
Before And After ◽  
Operational Expenditure ◽  
Observation Period

This study examined differences in the local government's financial performance before and after the transition from central tax BPHTB be local taxes? In general, this study aims to determine the contribution BPHTB to the PAD as a source of funding for the survival of each region in order to achieve local autonomy system. The samples used in this study is the district/city that has existed since autonomy BPHTB not be treated as 114 cities/districts. The realization of the study observation period is the period before the transition budget BPHTB (Year 2010) and after the transition BPHTB (Year 2011). The research data were statistically tested with a different test of two paired samples. The results show that the performance of local government in Java have differences before and after the transition BPHTB from the central government to local governments. This research can provide empirical evidence of the differences in the financial performance of the post-transition region from the center to the regions BPHTB especially Java. The results of this study can also be used as a reference in future studies with similar themes to consider several things. First, the use of samples that are not confined to the local government but the entire Indonesian island of Java. Second, adding the growth rate ie performance measurement. Third, review the compatibility ratio because in addition to operational expenditure and capital expenditure is no longer heading in the budget expenditure is financing and transfer.     Keywords: Bea Perolehan Hak atas Tanah dan Bangunan, Financial Performance, Autonomous Region.

scholarly journals ANALISIS KINERJA ANGGARAN PENDAPATAN BELANJA DAERAH KABUPATEN MOROWALI PADA PERIODE TAHUN 2011-2015

2017 ◽  
Vol 3 (1) ◽  
pp. 41-56
Author(s):  
Media Gramini ◽  
Muhammad Yunus Kasim ◽  
Cici Riyanti K Bidin
Keyword(s):  
Capital Expenditure ◽  
Ratio Analysis ◽  
Financial Ratio ◽  
Local Revenue ◽  
Financial Ratio Analysis ◽  
Local Expenditure ◽  
Quantitative Descriptive ◽  
Operational Expenditure ◽  
High Level ◽  
Negative Difference

This study aims to determine the performance of local revenue and expenditure budget of Morowali District in the period of 2011-2015. This research is quantitative descriptive. This study uses: (1) analysis performance of the local revenue consisting of variance revenue analysis, regional financial ratio analysis, (2) analysis of local expenditure performance includes: variance analysis of local expenditure, analysis of local expenditure activity, and analysis of local expenditure efficiency. The analysis shows that the performance of Morowali District’s local revenue and expenditure budget is poor due to: (1) variance revenue analysis is rated poorly because it has a negative difference; (2) analysis of local financial ratio shows that: (a) the degree of decentralization is very low, (b) independence ratio is very low with a pattern of instructive relationships, (c) dependence ratio has a high level of dependency and (d) effectiveness ratio is considered ineffective. Meanwhile the analysis of the performance of local expenditure shows: (1) variance expenditure analysis is considered good because it has a positive difference (2) activity ratio of expenditure is rated good while capital expenditure is considered less fit because Morowali District prioritizes its budget for operational expenditure than capital expenditures (3) efficiency analysis of expenditure is rated efficient. Penelitian ini bertujuan untuk mengetahui kinerja anggaran pendapatan belanja daerah Kabupaten Morowali pada periode tahun 2011-2015. Metode yang digunakan adalah metode deskriptif kuantitatif. Penelitian ini menggunakan alat analisis (1) analisis kinerja pendapatan daerah yang terdiri dari Analisis Varians Pendapatan, Analisis Rasio Keuangan Daerah, (2) analisis kinerja belanja daerah terdiri dari Analisis Varians Belanja Daerah, Analisis Keserasian Belanja Daerah, dan Analisis Efisiensi Belanja Daerah. Hasil analisis menunjukkan bahwa Kinerja APBD Kabupaten Morowali dilihat dari analisis kinerja pendapatan daerah Kabupaten Morowali memiliki kinerja kurang baik hal ini ditunjukkan (1) Analisis Varians Pendapatan dinilai kurang baik karena memiliki selisih negatif. (2) Analisis Rasio Keuangan Daerah terdiri dari (a) Derajat desentralisasi dinilai masih sangat rendah, (b)Rasio Kemandirian dinilai masih sangat rendah dengan pola hubungan instruktif, (c) Rasio Ketergantungan dinilai memiliki tingkat ketergantungan yang tinggi dan (d)Rasio Efektivitas PAD dapat dikategorikan tidak efektif. Sedangkan jika dilihat dari analisis kinerja belanja daerah: (1) Analisis Varians Belanja dinilai baik karena memiliki selisih positif (2) Rasio Keserasian belanja operasi dinilai serasi sedangkan belanja modal dinilai kurang serasi, dimana Kabupaten Morowali lebih memprioritaskan anggaran belanjanya untuk belanja operasi dibandingkan dengan belanja modal (3) Analisis Efisiensi Belanja dinilai efisien.

A Comparative Life Cycle Assessment of Marine Desox Systems

2021 ◽  
Vol 28 (1) ◽  
pp. 105-115
Author(s):  
Mengqi Cui ◽  
Yingwei Lu ◽  
Jiahao He ◽  
Lei Ji ◽  
Hui Wang ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Comprehensive Evaluation ◽  
Capital Expenditure ◽  
Environmental Aspect ◽  
Gas Treatment ◽  
Sulphur Oxides ◽  
System Life ◽  
Control Technologies ◽  
Operational Expenditure

Abstract With new sulphur oxides emission limits carried out in 2020, multiple desulphurisation methods have been proposed. The main desulphurisation scrubber systems were chosen and investigated using life cycle assessment. The whole system life is divided into the construction and operational phases. Three different systems classified by desulphurisers, namely, seawater, NaOH, and Mg-based systems, were modelled in GaBi software. Moreover, environmental, economic and energy aspects (3E model) were introduced for further analysis. Through this study, some conclusions have been drawn. As for the environmental aspect, the seawater system has the most pleasing performance since the primary emissions come from 1.24E+03 kg CO2 and 1.48E+01 kg chloride. The NaOH system causes 1000 times more emissions than the seawater. The Mg-based system has less pollution than the NaOH system, with 5.86E+06kg CO2 and 3.86E+03 kg chloride. The economic aspect is divided into capital expenditure (CapEx) and operational expenditure (OpEx) to estimate disbursement. The seawater system also has the most favourable cost appearance, which takes 1.7 million dollars without extra desulphuriser expenses, based on 10MW engine flue gas treatment. The next is the Mg-based system, which cost 2 million dollars in CapEx and $ 1200/year in OpEx for the desulphuriser. NaOH uses about 2.5 million dollars for construction and $ 30000/year in desulphuriser. As for the energy aspect, the seawater and Mg-based systems use less non-renewable energy than the NaOH system in the construction phase. In conclusion, the seawater system shows the best performance and could be an alternative in SOx control technologies. This study sheds light on the comprehensive evaluation of marine environmental protection technologies for further optimisation.

WARROON GAS DISCOVERY SUPPORTS EXPLORATION OF ANTICLINES

1981 ◽  
Vol 21 (1) ◽  
pp. 85
Author(s):  
B. R. BROWN
Keyword(s):  
Seismic Data ◽  
Acoustic Impedance ◽  
Gas Condensate ◽  
Seismic Survey ◽  
Seismic Surveys

Warroon, a small gas condensate discovery in the western Surat Shelf, was mapped as a faulted anticline from seismic data shot in April 1979. The discovery well was drilled in August 1979 on the then highest known point of the mapped closure. The well flowed up to 8 MMcf/D from about 2.4 m (eight feet) of Showgrounds Sandstone over the gross interval 2 048 to 2 060 m (6 720 to 6 760 ft). Subsequently, two small seismic surveys comprising 62 km and including experimental shooting and acoustic impedance processing have been shot over the anticline. A step-out will be considered in the 1981 drilling program.The discovery of gas and condensate in Warroon, and in the Glen Fosslyn discovery in an adjacent permit, optimistically suggests that the prospective area of the Wunger Ridge may be extended. A major seismic survey comprising over 450 km of 12-fold 96 channel recording was shot in the Spring of 1980. The interpretation of the data could lead to proposals to drill a number of wildcats on structures similar in appearance to Warroon.

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.

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.

Fluid dynamics at the base of hydrate-bearing sediments at the Vestnesa Ridge inferred from 5 years of high-resolution 4D seismic surveying

2020 ◽  
Author(s):  
Malin Waage ◽  
Stefan Bünz ◽  
Kate Waghorn ◽  
Sunny Singhorha ◽  
Pavel Serov
Keyword(s):  
High Resolution ◽  
Gas Hydrate ◽  
Seismic Data ◽  
Time Lapse ◽  
Stability Zone ◽  
Seismic Surveys ◽  
Free Gas ◽  
4D Seismic ◽  
Hydrate Bearing Sediments ◽  
Hydrate Stability

<p>The transition from gas hydrate to gas-bearing sediments at the base of the hydrate stability zone (BHSZ) is commonly identified on seismic data as a bottom-simulating reflection (BSR). At this boundary, phase transitions driven by thermal effects, pressure alternations, and gas and water flux exist. Sedimentation, erosion, subsidence, uplift, variations in bottom water temperature or heat flow cause changes in marine gas hydrate stability leading to expansion or reduction of gas hydrate accumulations and associated free gas accumulations. Pressure build-up in gas accumulations trapped beneath the hydrate layer may eventually lead to fracturing of hydrate-bearing sediments that enables advection of fluids into the hydrate layer and potentially seabed seepage. Depletion of gas along zones of weakness creates hydraulic gradients in the free gas zone where gas is forced to migrate along the lower hydrate boundary towards these weakness zones. However, due to lack of “real time” data, the magnitude and timescales of processes at the gas hydrate – gas contact zone remains largely unknown. Here we show results of high resolution 4D seismic surveys at a prominent Arctic gas hydrate accumulation – Vestnesa ridge - capturing dynamics of the gas hydrate and free gas accumulations over 5 years. The 4D time-lapse seismic method has the potential to identify and monitor fluid movement in the subsurface over certain time intervals. Although conventional 4D seismic has a long history of application to monitor fluid changes in petroleum reservoirs, high-resolution seismic data (20-300 Hz) as a tool for 4D fluid monitoring of natural geological processes has been recently identified.<br><br>Our 4D data set consists of four high-resolution P-Cable 3D seismic surveys acquired between 2012 and 2017 in the eastern segment of Vestnesa Ridge. Vestnesa Ridge has an active fluid and gas hydrate system in a contourite drift setting near the Knipovich Ridge offshore W-Svalbard. Large gas flares, ~800 m tall rise from seafloor pockmarks (~700 m diameter) at the ridge axis. Beneath the pockmarks, gas chimneys pierce the hydrate stability zone, and a strong, widespread BSR occurs at depth of 160-180 m bsf. 4D seismic datasets reveal changes in subsurface fluid distribution near the BHSZ on Vestnesa Ridge. In particular, the amplitude along the BSR reflection appears to change across surveys. Disappearance of bright reflections suggest that gas-rich fluids have escaped the free gas zone and possibly migrated into the hydrate stability zone and contributed to a gas hydrate accumulation, or alternatively, migrated laterally along the BSR. Appearance of bright reflection might also indicate lateral migration, ongoing microbial or thermogenic gas supply or be related to other phase transitions. We document that faults, chimneys and lithology constrain these anomalies imposing yet another control on vertical and lateral gas migration and accumulation. These time-lapse differences suggest that (1) we can resolve fluid changes on a year-year timescale in this natural seepage system using high-resolution P-Cable data and (2) that fluids accumulate at, migrate to and migrate from the BHSZ over the same time scale.</p>

Application of sparse-layer inversion and harmonic bandwidth extension for a channel system in Southern Alberta, Canada

2020 ◽  
Vol 8 (2) ◽  
pp. T217-T229
Author(s):  
Yang Mu ◽  
John Castagna ◽  
Gabriel Gil
Keyword(s):  
Seismic Data ◽  
Reflection Coefficients ◽  
3D Seismic ◽  
Bandwidth Extension ◽  
Data Set ◽  
Frequency Spectra ◽  
Channel System ◽  
Southern Alberta ◽  
Reflectivity Inversion ◽  
3D Seismic Data

Sparse-layer reflectivity inversion decomposes a seismic trace into a limited number of simple layer responses and their corresponding reflection coefficients for top and base reflections. In contrast to sparse-spike inversion, the applied sparsity constraint is less biased against layer thickness and can thus better resolve thin subtuning layers. Application to a 3D seismic data set in Southern Alberta produces inverted impedances that have better temporal resolution and lateral stability and a less blocky appearance than sparse-spike inversion. Bandwidth extension harmonically extrapolated the frequency spectra of the inverted layers and nearly doubled the usable bandwidth. Although the prospective glauconitic sand tunes at approximately 37 m, bandwidth extension reduced the tuning thickness to 22 m. Bandwidth-extended data indicate a higher correlation with synthetic traces than the original seismic data and reveal features below the original tuning thickness. After bandwidth extension, the channel top and base are more evident on inline and crossline profiles. Lateral facies changes interpreted from the inverted acoustic impedance of the bandwidth-extended data are consistent with observations in wells.

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