The characteristics and significance of conventional and unconventional Sinian–Silurian gas systems in the Sichuan Basin, central China

Zou, Caineng; Yang, Zhi; Dai, Jin; Dong, Dazhong; Zhang, Baomin; Wang, Yuman; Deng, Shuai; Huang, Jinliang; Liu, Keyu; Yang, Chun; Wei, Guoqi; Pan, Songqi

doi:10.1016/j.marpetgeo.2015.03.005

Cited by 150 publications

(80 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Continuous exploration for conventional gas since the 1960s has demonstrated high gas productivity for the upper Ediacaran Dengying Formation (ca. 551e542 Ma, Wei et al, 2008;Zou et al, 2015). Moreover, intensive efforts have begun in the past few years in China to evaluate and explore gas shales (Wang, 2015;Zou et al, 2011Zou et al, , 2015, inspired by the great success of exploration and production of unconventional shale gas in North America (Curtis, 2002;EIA, 2014;Jarvie et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…551e542 Ma, Wei et al, 2008;Zou et al, 2015). Moreover, intensive efforts have begun in the past few years in China to evaluate and explore gas shales (Wang, 2015;Zou et al, 2011Zou et al, , 2015, inspired by the great success of exploration and production of unconventional shale gas in North America (Curtis, 2002;EIA, 2014;Jarvie et al, 2007). Marine shales are widespread in the Yangtze Block, mainly in the Ediacaran Doushantuo Formation, the Lower Cambrian Niutitang Formation and the Lower Silurian Longmaxi Formation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Composition and pore characteristics of black shales from the Ediacaran Lantian Formation in the Yangtze Block, South China

Zeng

Jia

Peng

et al. 2016

Marine and Petroleum Geology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composition and pore characteristics of black shales from the Ediacaran Lantian Formation in the Yangtze Block, South China

Zeng

Jia

Peng

et al. 2016

Marine and Petroleum Geology

View full text Add to dashboard Cite

“…The paleo-uplifts and the slope zones in the basins are favorable directional zones for oil and gas migration (Zhou 2000;He et al 2000;Jin et al 2009;Jin 2010Jin , 2012Zhao et al 2012b;Wei et al 2015a;Zou et al 2015). In marine carbonate basins, low-and high-energy facies are often superimposed on paleo-uplifts and slope zones during the deposition process of transgressive-regressive cycles.…”

Section: Favorable Hydrocarbon Accumulation Zonesmentioning

confidence: 99%

Formation and distribution characteristics of Proterozoic–Lower Paleozoic marine giant oil and gas fields worldwide

et al. 2017

View full text Add to dashboard Cite

There are rich oil and gas resources in marine carbonate strata worldwide. Although most of the oil and gas reserves discovered so far are mainly distributed in Mesozoic, Cenozoic, and upper Paleozoic strata, oil and gas exploration in the Proterozoic-Lower Paleozoic (PLP) strata-the oldest marine strata-has been very limited. To more clearly understand the oil and gas formation conditions and distributions in the PLP marine carbonate strata, we analyzed and characterized the petroleum geological conditions, oil and gas reservoir types, and their distributions in thirteen giant oil and gas fields worldwide. This study reveals the main factors controlling their formation and distribution. Our analyses show that the source rocks for these giant oil and gas fields are mainly shale with a great abundance of type I-II organic matter and a high thermal evolution extent. The reservoirs are mainly gas reservoirs, and the reservoir rocks are dominated by dolomite. The reservoir types are mainly karst and reef-shoal bodies with well-developed dissolved pores and cavities, intercrystalline pores, and fractures. These reservoirs are highly heterogeneous. The burial depth of the reservoirs is highly variable and somewhat negatively correlated to the porosity. The cap rocks are mainly thick evaporites and shales, with the thickness of the cap rocks positively correlated to the oil and gas reserves. The development of high-quality evaporite cap rock is highly favorable for oil and gas preservation. We identified four hydrocarbon generation models, and that the major source rocks have undergone a long period of burial and thermal evolution and are characterized by early and long periods of hydrocarbon generation. These giant oil and gas fields have diverse types of reservoirs and are mainly distributed in paleo-uplifts, slope zones, and platform margin reef-shoal bodies. The main factors that control their formation and distribution were identified, enabling the prediction of new favorable areas for oil and gas exploration.

show abstract

“…However, the geological settings of organic-rich, marine shale formations in China are distinct from those in North America. In China, shale gas formations are characterized by old strata, deep burial, high thermal maturity, and multi-stage tectonism (Dai et al, 2014;Zou et al, 2015). Therefore, more targeted criteria are needed to evaluate shale gas generation potential in China.…”

Section: Introductionmentioning

confidence: 99%

“…The cracking of oil, or expelled bitumen, is considered the major source of conventional gas generated from hydrogen-rich marine source rocks (Welte et al, 1988;Rooney et al, 1995). Conventional and unconventional gas fields commonly occur together within a hydrocarbon basin (Zou et al, 2015), where the cracking of expelled oil produces conventional gas, and the cracking of retained oil (i.e., bitumen) and kerogen generates unconventional gas. As more oil is expelled, less bitumen is retained in the shale to generate unconventional gas.…”

Section: Introductionmentioning

confidence: 99%

The origin and evolution of thermogenic gases in organic-rich marine shales

Xiong

Zhang

Chen

et al. 2016

Journal of Petroleum Science and Engineering

View full text Add to dashboard Cite

The characteristics and significance of conventional and unconventional Sinian–Silurian gas systems in the Sichuan Basin, central China

Cited by 150 publications

References 31 publications

Composition and pore characteristics of black shales from the Ediacaran Lantian Formation in the Yangtze Block, South China

Composition and pore characteristics of black shales from the Ediacaran Lantian Formation in the Yangtze Block, South China

Formation and distribution characteristics of Proterozoic–Lower Paleozoic marine giant oil and gas fields worldwide

The origin and evolution of thermogenic gases in organic-rich marine shales

Contact Info

Product

Resources

About