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

Natural gas resource of Es1 layer in Yangxin subsag is very abundant. Natural gas formation, enrichment conditions and regularity are analyzed in this paper. Geochemistry analysis shows that natural gas resource of Es1 layer in Yangxin subsag belongs to biological origin gas. The sedimentary environment, ground temperature, gas source rock and preservation condition of the study area is advantageous, which provide a guarantee for natural gas generation and preservation. Research shows that natural gas enrichment in the lower part of Es1 layer because of limestone reservoir development, and on the horizontal direction natural gas is mainly enrichment in the eastern nose structure zone and southern slope zone. The both zones are the preferred zone for natural gas exploration in the study area.

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Groundbreaking gas source rock correlation research based on the application of a new experimental approach for adsorbed gas

Chinese Science Bulletin ◽

10.1007/s11434-012-5504-5 ◽

2012 ◽

Vol 57 (36) ◽

pp. 4746-4752 ◽

Cited By ~ 4

Author(s):

BaoGuang Shi ◽

Ping Shen ◽

XiaoFeng Wang ◽

JianJing Zhen

Keyword(s):

Source Rock ◽

Experimental Approach ◽

Gas Source ◽

Adsorbed Gas

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Analysis of Tight Gas Reservoir Forming Condition in Gulong-Changjiaweizi Region, Northern Songliao Basin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.652-654.2478 ◽

2013 ◽

Vol 652-654 ◽

pp. 2478-2483

Author(s):

Xue Juan Zhang ◽

Shuang Fang Lu ◽

Wei Huang ◽

Lei Zhang

Keyword(s):

Source Rock ◽

Songliao Basin ◽

Tight Gas ◽

Tight Sandstone ◽

Gas Reservoir ◽

Gas Accumulation ◽

Gas Source ◽

Geological Conditions ◽

Tight Gas Reservoir ◽

Sandstone Reservoir

This paper makes systematic analysis of geological factors of natural gas accumulation in Denglouku formation of Gulong-Changjiaweizi region, including reservoir characteristics, gas source condition, source-reservoir relationship, structural condition, etc. It turned out that K1d2 in Gulong-Changjiaweizi region is generally typical tight sandstone reservoir with low porosity and permeability due to the poor physical properties. The gas source rock of K1d2 formation has larger gas producing capacity.The relationship between source rock and reservoir shows as interbed interfinger or directly contiguity contact, which is beneficial for large-area gas accumulation. The gas generation area of source rock in this region is always in the center and slow downdip direction of Gulong depression with a smaller dip angle on the adjacent tight sandstone reservoir, where faults are rare. The result of comprehensive analysis shows that K1d2 formation in Nothern Songliao Basin and its neighboring layers could be considered as a favorable target of the tight gas reservoir study in Northern Songliao Basin due to its favorable geological conditions of deep basin tight gas reservoir generation, such as tight reservoir, sufficient gas source, communicating source-reservoir relationship and constant flattened structure.

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Oil/gas–source rock correlations in the Dniepr-Donets Basin (Ukraine): New insights into the petroleum system

Marine and Petroleum Geology ◽

10.1016/j.marpetgeo.2015.07.002 ◽

2015 ◽

Vol 67 ◽

pp. 720-742 ◽

Cited By ~ 8

Author(s):

D. Misch ◽

R.F. Sachsenhofer ◽

A. Bechtel ◽

R. Gratzer ◽

D. Gross ◽

...

Keyword(s):

Source Rock ◽

Petroleum System ◽

Donets Basin ◽

Gas Source ◽

Oil Gas

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Evaluation of Gas Generation Potential Using Thermal Maturity Modelling—The Katakolo Case: A Probable Pathway to Energy Transition

Materials Proceedings ◽

10.3390/materproc2021005070 ◽

2021 ◽

Vol 5 (1) ◽

pp. 70

Author(s):

Vagia Makri ◽

George Panagopoulos ◽

Konstantinos Nikolaou ◽

Spyridon Bellas ◽

Nikos Pasadakis

Keyword(s):

Oil And Gas ◽

Energy Transition ◽

Hydrocarbon Exploration ◽

Thermal Maturity ◽

Gas Generation ◽

The West ◽

Biogenic Gas ◽

Gas Source ◽

Net Zero ◽

Legacy Data

It is evident that the increased focus on energy transition, will increase the demand for gas as it is the transitional fuel to the net zero CO2 emission era. The West Katakolo field is the only oil and gas discovery in Western Greece, and it is operated by Energean. The three offshore West Katakolo wells have defined both the oil and the gas zones, while onshore exploration wells have penetrated biogenic gas-saturated Plio-Pleistocene sands. This study assesses the gas generation potential of the local Plio-Pleistocene and Triassic sources using thermal maturity modelling based on the available legacy data, with limitations being addressed by running several case-scenarios. In conclusion, this study supports the generation of thermogenic and biogenic gas from the Triassic and Plio-Pleistocene sources respectively, demonstrating the importance of maturity modelling in hydrocarbon exploration, applied on the Katakolo case; a potential gas source to facilitate the energy transition in Greece.

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

BULLETIN OF THE MARINE GEOLOGY ◽

10.32693/bomg.31.1.2016.341 ◽

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 TopangÂ 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

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