scholarly journals Shallow Gas Features Based on Interpretation of Bottom Profilling Records at Topang Delta, Meranti Regency, Riau Province

2017 ◽  
Vol 31 (1) ◽  
Author(s):  
Purnomo Raharjo ◽  
Andrian Willyan Djaja ◽  
Ediar Usman
Keyword(s):  
Anaerobic Bacteria ◽  
Research Area ◽  
Reservoir Rock ◽  
Energy Research ◽  
Shallow Gas ◽  
Biogenic Gas ◽  
River Deltas ◽  
Gas Source ◽  
Cap Rock ◽  
Clay Sediment

One of the tasks in conducting a renewable energy research is finding a shallow gas contained commonly in river deltas. The location chosen is in Topang Delta,, Meranti District, Riau Province in 2015. The research was conducted by using sub-bottom profiling (SBP) method. Biogenic gas indications could be observed in the SBP records in the forms of free reflector, acoustic plumes and acoustic blanket. The shallow biogenic gas at research area is trapped in A and B sequences. Sequence A is characterized by plume gas and acoustic blanket, while B-type biogenic gas is showed by free-reflector feature of 10-15 meters depth. Sediment which does not have porocity such as old clay is required environment for anaerobic bacteria as catalyst in the formation of biogenic gas to be evolved. Old clay sediment is potential as a biogenic gas source rock afterwards migrated to a layer of sand as a reservoir rock. Some parts of biogenic gas does not appear to the surface because there have been traped in cap rock in form of young clay sediment.Keywords: Topang Delta, Biogenic Gas, free reflector, acoustic plumes, acoustic blanket Salah satu tugas dalam melakukan penelitian energi terbarukan adalah pecarian gas dangkal yang biasa terdapat di delta-delta sungai. Lokasi yang terpilih adalah di delta Topang  Kabupaten Kepulauan Meranti, Provinsi Riau pada tahun 2015. Penelitian yang dilakukan salah satunya menggunakan metoda sub bottom profilling (SBP). Indikasi gas biogenik tampak dalam rekaman subbottom profilling berupa reflektor bebas pantul, terobosan gas dan selimut akustik. Keterdapatan gas biogenik dangkal di lokasi penelitian terjebak dalam sekuen sedimen A dan B. Sekuen A dicirikan dengan kenampakan berupa terobosan gas dan selimut akustik, sedangkan biogenik gas tipe-B dicirikan dengan kehadiran reflektor bebas pantul dengan ketebalan 10-15 meter. Sedimen yang tidak memiliki porositas seperti lempung tua merupakan lingkungan yang dimungkinkan untuk bakteri anaerobik sebagai katalisator dalam pembentukan gas biogenik. Endapan lempung tua berpotensi sebagai batuan sumber biogenik gas kemudian bermigrasi ke lapisan sedimen pasir sebagai tempat tersimpannya gas biogenik. Sebagian gas biogenik tidak dapat muncul ke permukaan hingga lapisan atas karena terjebak dalam lapisan sedimen penutup berupa lempung muda.Kata Kunci : Delta Topang, Gas Biogenik, bebas pantul, terobosan gas, selimut akustik

Aichi-Rinku New Energy Research Area

2010 ◽  
Vol 130 (6) ◽  
pp. 336-339
Author(s):  
Masayuki YODA ◽  
Kazuto YUKITA ◽  
Yuki OHSHIMA ◽  
Kiyonori BAN ◽  
Maki FUJINAGA
Keyword(s):  
Research Area ◽  
Energy Research ◽  
New Energy

scholarly journals Temperature-Driven Hydrocarbon Generation-Expulsion and Structural Transformation of Organic-Rich Shale Assessed by in situ Heating SEM

2021 ◽  
Vol 9 ◽  
Author(s):  
Yuan Yuan ◽  
Jijin Yang
Keyword(s):  
Structural Changes ◽  
Fracture Network ◽  
Reservoir Rock ◽  
Continuous Heating ◽  
Hydrocarbon Generation ◽  
Sem Images ◽  
Cap Rock ◽  
Hydrocarbon Expulsion ◽  
The Relationship

Mud shale can serve as source or cap rock but also as a reservoir rock, and so the development of pores or cracks in shale has become of great interest in recent years. However, prior work using non-identical samples, varying fields of view and non-continuous heating processes has produced varying data. The unique hydrocarbon generation and expulsion characteristics of shale as a source rock and the relationship with the evolution of pores or cracks in the reservoir are thus not well understood. The present work attempted to monitor detailed structural changes during the continuous heating of shale and to establish possible relationships with hydrocarbon generation and expulsion by heating immature shale samples while performing in situ scanning electron microscopy (SEM) imaging and monitoring the chamber vacuum. Samples were heated at 20°C/min from ambient to 700°C with 30 min holds at 100°C intervals during which SEM images were acquired. The SEM chamber vacuum was found to change during sample heating as a consequence of hydrocarbon generation and expulsion. Two episodic hydrocarbon expulsion stages were observed, at 300 and 500°C. As the temperature was increased from ambient to 700°C, samples exhibited consecutive shrinkage, expansion and shrinkage, and the amount of structural change in the vertical bedding direction was greater than that in the bedding direction. At the same time, the opening, closing and subsequent reopening of microcracks was observed. Hydrocarbon generation and expulsion led to the expansion of existing fractures and the opening of new cracks to produce an effective fracture network allowing fluid migration. The combination of high-resolution SEM and a high-temperature heating stage allowed correlation between the evolution of pores or cracks and hydrocarbon generation and expulsion to be examined.

scholarly journals INDIKASI GAS BIOGENIK DI PERAIRAN DELTA MAHAKAM, PROVINSI KALIMANTAN TIMUR

2017 ◽  
Vol 14 (2) ◽  
Author(s):  
I Nyoman Astawa ◽  
Deny Setiady ◽  
Priatin Hadi Wijaya ◽  
GM. Hermansyah ◽  
Mario Dwi Saputra
Keyword(s):  
Sedimentation Rate ◽  
Methanogenic Bacteria ◽  
Laboratory Analysis ◽  
Shallow Gas ◽  
Biogenic Gas ◽  
Methane Gas ◽  
East Kalimantan ◽  
High Sedimentation ◽  
Mahakam Delta ◽  
Very High

Gas biogenik dikenal sebagai gas rawa atau gas dangkal yang terbentuk dari bakteri metanogenik pada lingkungan anaerobik, khususnya pada daerah-daerah yang tingkat sedimentasinya sangat tinggi.Tujuan penelitian untuk mengetahui secara lebih rinci akan keberadaan gas tersebut di Delta Mahakam. Sungai tersebut merupakan sungai terbesar dan terpanjang di wilayah Kalimantan Timur dan mempunyai tingkat sedimentasi sangat tinggi. Daerah tersebut sangat cocok untuk penelitian indikasi gas biogenik. Hasil penelitian ditandai dengan terdapatnya kantong gas pada rekaman strata box, yang berada pada kedalaman lebih dari 10 (sepuluh) meter. Berdasarkan analisis laboratorium terhadap sampel gas yang diambil di bekas lubang bor adalah gas metan.Kata kunci: rekaman strata box, gas metan, Delta MahakamBiogenic gas known as swamp gas or shallow gas formed by methanogenic bacteria in anaerobic environments, especially in areas that the sedimentation rate is very high. The objective of the research is to find out more detail the occurrence of gas in the Mahakam Delta. The river is the largest and longest river in the East Kalimantan, and it has a very high sedimentation rate.  This area is very good to study the indication of the biogenic gas. The result is signed by gas pocket in the strata box records, whereas at a depth of more than 10 (ten) meters. Based on the laboratory analysis of the samples taken from the former gas borehole is a methane gas.Keywords: strata box records, methane gas, Mahakam Delta.

scholarly journals The scCO2 Storage and Sealing Capacity of the Janggi Basin in Korea: Based on Laboratory Scale Experiments

2019 ◽  
Author(s):  
Jinyoung Park ◽  
Minjune Yang ◽  
Seyoon Kim ◽  
Minhee Lee ◽  
Sookyun Wang
Keyword(s):  
Pore Water ◽  
Direct Measurement ◽  
Supercritical Co2 ◽  
Laboratory Experiments ◽  
Storage Capacity ◽  
Co2 Storage ◽  
Reservoir Rock ◽  
Seepage Pressure ◽  
Sealing Capacity ◽  
Cap Rock

Laboratory experiments were performed to measure the supercritical CO2 (scCO2) storage ratio (%) of the conglomerate and sandstone in Janggi Basin, which are classified as rock in Korea available for CO2 storage. The scCO2 storage capacity was evaluated by direct measurement of the scCO2 amount replacing pore water in a reservoir rock core. The scCO2 sealing capacity of the cap rock (i.e., tuff and mudstone), was also compared by measuring the initial scCO2 seepage pressure (Δp) into the rock core. The measured average scCO2 storage ratio of the conglomerate and the sandstone in Janggi Basin was 30.7 % and 13.1 %, respectively, suggesting that the scCO2 storage capacity is greater than 360,000 metric tons in the Janggi Basin. The initial scCO2 seepage pressure of the tuff in the Janggi Basin was 15 bar and continuous scCO2 injection into the tuff core occurred at Δp higher than 20 bar. For the mudstone, the initial scCO2 seepage pressure was higher than 150 bar (10 times higher than that of the tuff), demonstrating that the mudstone is more suitable than the tuff to shield scCO2 leakage from the reservoir rock in the Janggi Basin.

scholarly journals 50 Years of Systems Analysis of Energy Development In The Ussr And Russia

2020 ◽  
Author(s):  
A.A. Makarov
Keyword(s):  
Systems Analysis ◽  
Information Society ◽  
State Committee ◽  
Research Area ◽  
Energy Development ◽  
Energy Research ◽  
Russian Academy Of Sciences ◽  
Social And Economic Development ◽  
Two Stages ◽  
Academy Of Sciences

This year replete with so many anniversaries related to the energy sector sees the centenary celebration of the GOELRO Plan. This event is remarkable for energy studies: a complex energy method that backed up the Plan development half a century later became one of the preconditions for the development of the methodology of systems analysis of the energy development. The groundwork of this methodology was laid at SEI/ESI SB RAS (Siberian Energy Institute. Melentiev Energy Systems Institute of the Siberian Branch of the Russian Academy of Sciences) founded by Academician L.A. Melentiev; the institute celebrates its 60th anniversary this year. Half a century ago, an 'off-site' department of the SEI was established in Moscow and 15 years later it was reorganized into ERI RAS (Energy Research Institute of the Russian Academy of Sciences) and GKNT (State Committee for Science and Technology). The paper focuses on the background of the development of the theory and methods of systems analysis of energy development, covers its main theoretical and applied contributions in two stages of social and economic development of the country, discusses evolution of this research area and its possible adoption in the alternative (mobilization-type and liberal) concepts of shaping 'the information society’ of the future.

scholarly journals A Review of Uncertain Decision-Making Methods in Energy Management Using Text Mining and Data Analytics

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3947
Author(s):  
Madjid Tavana ◽  
Akram Shaabani ◽  
Francisco Javier Santos-Arteaga ◽  
Iman Raeesi Vanani
Keyword(s):  
Decision Making ◽  
Text Mining ◽  
Research Area ◽  
Decision Makers ◽  
Energy Planning ◽  
Text Analytics ◽  
Research Subjects ◽  
Energy Research ◽  
Ideal Solutions ◽  
Hierarchy Process

The managerial and environmental studies conducted in the energy research area reflect its substantial importance, particularly when optimizing and modifying consumption patterns, transitioning to renewable sources away from fossil ones, and designing plans and systems. The aim of this study is to provide a systematic review of the literature allowing us to identify which research subjects have been prioritized in the fields of energy and sustainability in recent years, determine the potential reasons explaining these trends, and categorize the techniques applied to analyze the uncertainty faced by decision-makers. We review articles published in highly ranked journals through the period 2003–2020 and apply text analytics to cluster their main characteristics; that is, we rely on pre-processing and text mining techniques. We analyze the title, abstract, keywords, and research methodology of the articles through clustering and topic modeling and illustrate what methods and fields constitute the main focus of researchers. We demonstrate the substantial importance of fuzzy-related methods and decision-making techniques such as the Analytical Hierarchy Process and Technique for Order Preferences by Similarity to Ideal Solutions (TOPSIS). We also show that subjects such as renewable energy, energy planning, sustainable energy, energy policy, and wind energy have gained relevance among researchers in recent years.

scholarly journals Hydrogeochemical Modeling to Identify Potential Risks of Underground Hydrogen Storage in Depleted Gas Fields

2018 ◽  
Vol 8 (11) ◽  
pp. 2282 ◽  
Author(s):  
Christina Hemme ◽  
Wolfgang van Berk
Keyword(s):  
Hydrogen Storage ◽  
Transport Model ◽  
Reservoir Rock ◽  
Redox Equilibrium ◽  
Hydrogeochemical Modeling ◽  
Wide Range ◽  
Mass Transport Model ◽  
Cap Rock ◽  
Gas Fields ◽  
Underground Hydrogen Storage

Underground hydrogen storage is a potential way to balance seasonal fluctuations in energy production from renewable energies. The risks of hydrogen storage in depleted gas fields include the conversion of hydrogen to CH4(g) and H2S(g) due to microbial activity, gas–water–rock interactions in the reservoir and cap rock, which are connected with porosity changes, and the loss of aqueous hydrogen by diffusion through the cap rock brine. These risks lead to loss of hydrogen and thus to a loss of energy. A hydrogeochemical modeling approach is developed to analyze these risks and to understand the basic hydrogeochemical mechanisms of hydrogen storage over storage times at the reservoir scale. The one-dimensional diffusive mass transport model is based on equilibrium reactions for gas–water–rock interactions and kinetic reactions for sulfate reduction and methanogenesis. The modeling code is PHREEQC (pH-REdox-EQuilibrium written in the C programming language). The parameters that influence the hydrogen loss are identified. Crucial parameters are the amount of available electron acceptors, the storage time, and the kinetic rate constants. Hydrogen storage causes a slight decrease in porosity of the reservoir rock. Loss of aqueous hydrogen by diffusion is minimal. A wide range of conditions for optimized hydrogen storage in depleted gas fields is identified.

Distribution Characteristics of Fractures in the Volcanic Reservoirs of Songliao Basin, China

2014 ◽  
Vol 962-965 ◽  
pp. 273-276
Author(s):  
Lei Gong ◽  
Shuai Gao ◽  
Jian Guo Huang ◽  
Shu Jun Guo ◽  
Xian Xian Tao
Keyword(s):  
Songliao Basin ◽  
Hydrocarbon Generation ◽  
Peak Period ◽  
Secondary Fracture ◽  
Gas Accumulation ◽  
Gas Source ◽  
Sealing Ability ◽  
Cap Rock ◽  
The Relationship ◽  
Second Period

In order to clarify the relationship between fractures and gas accumulation, using data of cores, image logs and experimental analysis, we analyzed the fracture genetic types, development characteristics, controlling factors, distribution rules and formation periods. And then, by combining the evolution of source rock, activity periods of gas source faults and the evolution of cap rock sealing ability in the study area, we discussed the relationship between tectonic fractures and gas accumulation. The results show that there exist primary fracture and secondary fracture in the volcanic rocks of Yingcheng Formation in Songliao Basin. Between the two types, the secondary facture is dominant. Tectonic fractures are controlled by lithology, lithofacies and faults in the plane, and by unconformities vertically, with the characteristics of distribution of cycles. The tectonic fractures formed in three phases, wherein the second period coincides with the hydrocarbon generation peak period. During the second period, gas source faults are active and cap rock had a better sealing ability. This period is the main hydrocarbon accumulation stage in the study area.

Source of nutrient substrates for microbes in deep biosphere and characteristics of biogenic gas source rock

2010 ◽  
Vol 53 (8) ◽  
pp. 1163-1168 ◽  
Author(s):  
YanHua Shuai ◽  
ShuiChang Zhang ◽  
JianPing Chen ◽  
AiGuo Su
Keyword(s):  
Source Rock ◽  
Deep Biosphere ◽  
Biogenic Gas ◽  
Gas Source
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