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Wenchang Formation

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Journal Article
Published: 01 July 2004
Journal of Sedimentary Research (2004) 74 (4): 527–536.
... and preservation of storm-related tidal-flat rhythmites on open coasts, and highlights the fact that storm related facies can mimic the cyclicity that is commonly ascribed to neap-spring tidal variation. The Wenchang Formation is subdivided into three members ( Table 1 ). The basal Wenchang member (M 1...
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—Organic matter maturity of the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span> in the <span class="search-highlight">Wenchang</span> B sag, Z...
Published: 01 June 1999
Figure 7 —Organic matter maturity of the Wenchang Formation in the Wenchang B sag, Zhu III subbasin.
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Biostratigraphy and lithology of the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span> and the interval yi...
Published: 12 May 2022
Fig. 1. Biostratigraphy and lithology of the Wenchang Formation and the interval yielding the Anji Biota.
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Detailed seismic profiles of (a) CS1 (<span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span>) showing sequence ...
Published: 19 February 2019
Figure 5. Detailed seismic profiles of (a) CS1 (Wenchang Formation) showing sequence boundaries. Note onlap and truncation of seismic reflectors, (b) CS2 (Enping Formation) showing the sequence boundaries. Note onlap, downlap, and truncation of seismic reflectors, (c) CS3 (Zhuhai Formation
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Typical lithofacies and sedimentary structures of the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span> in...
Published: 19 April 2018
Figure 6. Typical lithofacies and sedimentary structures of the Wenchang Formation in the HZ25 Block of the HZ Depression. (a) 3785.8 m in HA1, fine-grained conglomerate with cross bedding. (b) 3753.8 m in HA2, conglomerate with cross bedding. (c) 3767.5 m in HA2, fine-grained conglomerate
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(a) Sandstone isopach map of SQ2 sequence in the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span>, which ...
Published: 19 April 2018
Figure 13. (a) Sandstone isopach map of SQ2 sequence in the Wenchang Formation, which was obtained from the seismic inversion data. (b) A 3D view of structural map of the SB1 surface, revealing large-scale drainage catchments associated a long sediment transportation distance in the overlapped
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—Elemental composition of kerogens of the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span> in the Wenchan...
Published: 01 June 1999
Figure 6 —Elemental composition of kerogens of the Wenchang Formation in the Wenchang B sag, Zhu III subbasin.
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—Isopach map of the <span class="search-highlight">Wenchang</span> <span class="search-highlight">Formation</span> in the Zhu III subbasin.
Published: 01 June 1999
Figure 5 —Isopach map of the Wenchang Formation in the Zhu III subbasin.
Journal Article
Journal: AAPG Bulletin
Published: 15 April 2021
AAPG Bulletin (2021) 105 (4): 749–783.
... accumulation process and locate the active gas source rocks in the Baiyun depression. The fluid inclusion gases were generated from oil-prone Wenchang Formation source rocks of high thermal maturity (1.7%–3.1% vitrinite reflectance [ R o ]), with most R o values between 2.1% and 2.7% R o . The mixing...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 2018
AAPG Bulletin (2018) 102 (11): 2171–2200.
... are associated with condensate and are characterized by relatively heavy carbon isotopes, with methane and ethane δ 13 C values ranging from –44.2‰ to –33.6‰ and –30.0‰ to –25.4‰, respectively. Nearly all methane and ethane are derived from oil-prone type II kerogen in the Wenchang Formation source rock, whereas...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 2017
AAPG Bulletin (2017) 101 (9): 1543–1564.
..., is characterized by two thick, Paleogene, organic-rich synrift units, the Wenchang and Enping Formations. The integration of bulk geochemical and biomarker data with tectonic and sedimentary information provides the basis for a comprehensive assessment of the environmental and ecological changes through geologic...
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Surface distribution of oil sources in the Baiyun Sag. I, organic matter (O...
Published: 01 May 2018
Fig. 13. Surface distribution of oil sources in the Baiyun Sag. I, organic matter (OM) derived from the Enping Formation, primarily; II, OM derived from the Enping and Wenchang Formations; III, OM derived from the Wenchang Formation, primarily; IV, OM derived from the Enping and Zhuhai Formations
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GC-MS TIC,  m / z  191 and  m / z  217 traces of five oil samples represent...
Published: 01 May 2018
Fig. 12. GC-MS TIC, m / z 191 and m / z 217 traces of five oil samples representing different sources. S1-EP, single source from the Enping Formation; S1-WC, single source from the Wenchang Formation; M1, mixed sources from the Enping and Wenchang Formation; M2, mixed sources from the Enping
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The total thickness distribution of the semideep-water and deep-water lacus...
Published: 15 April 2021
Figure 17. The total thickness distribution of the semideep-water and deep-water lacustrine facies source rocks in the Wenchang Formation, Baiyun depression. The thickness of the Wenchang Formation source rocks was determined based on seismic facies interpretations of 16 seismic lines. CI
Journal Article
Journal: AAPG Bulletin
Published: 01 June 1999
AAPG Bulletin (1999) 83 (6): 990–1003.
...Figure 7 —Organic matter maturity of the Wenchang Formation in the Wenchang B sag, Zhu III subbasin. ...
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(A) Variation of methane δ 13 C versus ethane δ 13 C for fluid inclusion ga...
Published: 15 April 2021
Formation–sourced oil-associated gas with the highly mature Wenchang Formation–sourced gas. The typical Enping Formation–sourced oil-associated gas from well HZ9-2-1 in the Huizhou depression in the Zhu I subbasin (δ 13 C 1 = –43.4‰, δ 13 C 2 = –31.4‰) was selected as one end member, and the fluid
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Activation energy distributions for four source rock types determined by an...
Published: 15 April 2021
Figure 6. Activation energy distributions for four source rock types determined by analysis of closed isothermal hydrous pyrolysis experiments and input parameters for hydrocarbon generation modeling including total organic carbon ( TOC ) and hydrogen index ( HI ) values. (A) Wenchang Formation
Journal Article
Journal: Interpretation
Published: 19 April 2018
Interpretation (2018) 6 (2): SD71–SD87.
...Figure 6. Typical lithofacies and sedimentary structures of the Wenchang Formation in the HZ25 Block of the HZ Depression. (a) 3785.8 m in HA1, fine-grained conglomerate with cross bedding. (b) 3753.8 m in HA2, conglomerate with cross bedding. (c) 3767.5 m in HA2, fine-grained conglomerate...
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—Events chart of the <span class="search-highlight">Wenchang</span>-Zhuhai(.) petroleum system. SH+WC = Shenhu an...
Published: 01 June 1999
Figure 12 —Events chart of the Wenchang-Zhuhai(.) petroleum system. SH+WC = Shenhu and Wenchang Formations, EP = Enping Formation, ZH = Zhuhai Formation, ZJ = Zhujiang Formation, HJ = Hanjiang Formation, Y+W = Yuehai and Wanshan formations, Q = Quaternary.
Journal Article
Journal: GSA Bulletin
Published: 17 December 2019
GSA Bulletin (2020) 132 (7-8): 1741–1755.
..., South China Sea, utilizing four different kinds of methods, i.e., saturated hydrocarbon biomarkers, strontium abundance, non-pollen microalgae assemblies, and carbon-sulfur relationships. Results show that the second member of the Eocene Wenchang Formation (E 2 w 2 ) was deposited in a freshwater...
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