The Potential of China's Lacustrine Shale Gas Resources

Lin, Lamei; Zhang, Jinchuan; Li, Yuxi; Jiang, Shu; Tang, Xuan; Jiang, Shengling; Jiang, Wenli

doi:10.1260/0144-5987.31.2.317

Cited by 22 publications

(9 citation statements)

References 6 publications

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“…However, regardless of whether they are aquatic or terrestrial, the organic matter of animals and plants can be used as the source material of oil, and their quantity and organic matter undergo the conditions for conversion into hydrocarbons, and the continental sedimentary environment is no less productive than the marine sedimentary environment, potentially generating oil and gas fields. The Daqing Oilfield is a representative continental sedimentary oil field in Northeast China [57][58][59][60] . Large-area sedimentary basins provide sufficient material conditions for the formation of these methane hydrates in this region.…”

Section: Resultsmentioning

confidence: 99%

Geological methane emissions and wildfire risk in the degraded permafrost area of the Xiao Xing’an Mountains, China

Shan

Guo

et al. 2020

Sci Rep

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With global warming, the carbon pool in the degradation zone of permafrost around the Arctic will gradually be disturbed and may enter the atmosphere in the form of released methane gas, becoming an important factor of environmental change in permafrost areas. We selected the northwestern section of the Xiao Xing'an Mountains in China as the study area, located in the degradation zone on the southern margin of the permafrost region in Eurasia, and set up multiple study monitoring areas equipped with methane concentration sensors, air temperature sensors, pore water pressure sensors and soil temperature sensors for long-term monitoring of data changes using the high-density electrical method, ground penetrating radar and on-site drilling to survey the distribution of frozen soil and geological conditions in the study area, combined with remote sensing images of Sentinel-2 L1C and unmanned aerial vehicle photographs and three-dimensional image reconstruction, analysis of fire activities and related geological environmental factors. The results show that since 2004, the permafrost thickness of the marsh wetland in the study area has gradually reduced and the degradation rate obviously accelerated; the organic matter and methane hydrate (metastable methane hydrate and stable methane hydrate) stored in the permafrost under the marsh wetland are gradually entering the atmosphere in the form of methane gas. Methane emissions show seasonal changes, and the annual methane emissions can be divided into three main stages, including a high-concentration short-term emission stage (March to May), a higher-concentration long-term stable emission stage (June to August) and a higher-concentration short-term emission stage (September to November); there is a certain correlation between the change in atmospheric methane concentration and the change in atmospheric pressure and pore water pressure. From March to May every year (high-concentration short-term emission stage), with snow melting, the air humidity reaches an annual low value, and the surface methane concentration reaches an annual high value. The high concentration of methane gas entering the surface in this stage is expected to increase the risk of wildfire in the permafrost degradation area in two ways (increasing the regional air temperature and self-combustion), which may be an important factor that leads to a seasonal wildfire frequency difference in the permafrost zone of Northeast China and Southeast Siberia, with the peak in spring and autumn and the monthly maximum in spring. The increase in the frequency of wildfires is projected to further generate positive feedback on climate change by affecting soil microorganisms and soil structure. Southeastern Siberia and northeastern China, which are on the southern boundary of the permafrost region of Eurasia, need to be targeted to establish fire warning and management mechanisms to effectively reduce the risk of wildfires.

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Section: Resultsmentioning

confidence: 99%

Geological methane emissions and wildfire risk in the degraded permafrost area of the Xiao Xing’an Mountains, China

Shan

Guo

et al. 2020

Sci Rep

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“…The successful exploitation of shale gas resources in the United States has led to the global development of shale gas. In China, marine-continental transitional shale gas exploration has been significant (Dong et al., 2015; Ji et al., 2014; Lin et al., 2015; Nie et al., 2012; Xu and Bao, 2009; Zou et al., 2016). However, the exploration and development of transitional facies shale gas resources are still at an early stage.…”

Section: Introduction and Methodologymentioning

confidence: 99%

Geology and transitional shale gas resource potentials in the Ningwu Basin, China

Xu²,

Jiang

et al. 2018

Energy Exploration & Exploitation

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We analyzed the tectonic evolution characteristics, sedimentary environment, geochemical characteristics, petrological characteristics, and gas-bearing properties of three mudstone sections of the Lower Paleozoic in Ningwu Basin, NE China, and determined the geologic characteristics and resource potential of the transitional facies shale gas. Geochemical analysis of the organic carbon content, kerogen macerals, and vitrinite reflectance of the shale samples showed that the total organic content was generally over 2.0%, the main organic type was type III, and the vitrinite reflectance values (Ro) were between 1.20 and 1.90%. Thus, the mudstones are good shale gas source rocks. The thickness of the three mudstone sections was approximately 30-70 m, and the average porosity was 3.10%. The pore types were diverse with good reservoir capacity. The shale gas resources of the Carboniferous-Permian transitional facies estimated by the volumetric method were approximately 2798.97 Â 10 8 -4643.09 Â 10 8 m 3. Through a comparison with shales in SW China, where shale gas has been successfully exploited, we determined the preferred criteria for favorable shale gas areas, as well as favorable areas for shale gas enrichment.

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“…The early Permian to Quaternary organic-rich shales in China occur in more than 50% of the lacustrine basins . These organic-rich lacustrine shales comprise the majority of China's source rocks for three-quarters of China's oil resources and approximately one-half of the gas resources and are considered potential shale plays (Jia and Chi 2004;Zhang et al 2008a;Zou et al 2010Zou et al , 2014Lin et al 2013;Jiang 2014;Fig. 2).…”

Section: Concepts and Methodologymentioning

confidence: 99%

Multiple-stacked Hybrid Plays of lacustrine source rock intervals: Case studies from lacustrine basins in China

et al. 2017

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Hydrocarbon-producing lacustrine basins are widely developed in the world, and China has a large number of lacustrine basins that have developed since the early Permian. The organic-rich shale-dominated heterogeneous source rock intervals in Chinese lacustrine basins generally contain frequent thin interbeds of stratigraphically associated sandstone, siltstone, marl, dolomite, and limestone. The concept of ''Hybrid Plays'' as put forth in this article recognizes this pattern of alternating organicrich shale and organic-lean interbeds and existence of mixed unconventional and conventional plays. Hybrid Plays in lacustrine source rock intervals present a unique closed petroleum system hosting continuous hydrocarbons. The interbedded organic-lean siliciclastic and/or carbonate plays are efficiently charged with hydrocarbons via short migration pathways from the adjacent organic-rich shale that is often also a self-sourced play. We assert ''Hybrid Plays'' provide the most realistic exploration model for targeting multiple-stacked and genetically related very tight shale, tight and conventional plays together in the entire source rock interval rather than individual plays only. The Hybrid Play model has been proven and works for a wide variety of lacustrine rift, sag and foreland basins in China.

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The Potential of China's Lacustrine Shale Gas Resources

Abstract: China is rapidly advancing both theoretical research and practical exploration of her shale gas deposits. Shale gas deposits in China span the gamut of the basic geological features e.g

Cited by 22 publications

References 6 publications

Geological methane emissions and wildfire risk in the degraded permafrost area of the Xiao Xing’an Mountains, China

Geological methane emissions and wildfire risk in the degraded permafrost area of the Xiao Xing’an Mountains, China

Geology and transitional shale gas resource potentials in the Ningwu Basin, China

Multiple-stacked Hybrid Plays of lacustrine source rock intervals: Case studies from lacustrine basins in China

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