Comprehensive assessment of source rocks in the Bohai Sea area, eastern China

Jiang, Fujie; Pang, Xiongqi; Bai, Jing; Zhou, Xinhuai; Li, Jianping; Guo, Yuqing

doi:10.1306/02101613092

Cited by 50 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interceptions of the envelope lines with these threshold values represent source rocks reaching ASDLs. This envelope method has been widely and successfully employed in a variety of basins in China, and numerous studies containing different geochemical data and mathematical models have been published (Zhou and Pang, 2002;Pang et al, 2004;Jiang et al, 2016;Peng et al, 2018). It is found that the profiles of hydrocarbon generation potential index, V e , and residual hydrocarbons are overall bell-shaped, although details can vary depending on the source rock types (e.g., different lithologies and organic matter types).…”

Section: Asdls In the Six Representative Basinsmentioning

confidence: 99%

“…This study did not take the abiogenic petroleum origin into account for the reason that the genetic relationship between petroleum and organic matter in source rocks are proved and widely accepted (Magoon and Dow, 1994;Peters et al, 2005). Besides this, no commercial petroleum reservoirs of abiogenic origins have been discovered to date (Kenney et al, 2002;Glasby, 2006;Höök et al, 2010;Selley and Sonnenberg, 2014). In this study, geological and geochemical data of 13 634 source rock samples from 1286 exploration wells in six basins were examined.…”

Section: Introductionmentioning

confidence: 99%

“…In some basins, dry layers, target strata containing no oil or gas, are prevalent at a depth of 4500 m or less, whereas in some other basins, the maximum burial depth for oil and gas accumulation is predicted to be more than 10 000 m. To date, the maximum depth to which fossil fuels can be formed and preserved in the Earth's crust remains unresolved. Some research supporting the abiogenic petroleum origin asserts that the maximum depth of hydrocarbon occurrence is much deeper than the maximum depth of petroliferous basins (Gold, 1993;Kenney et al, 2002). Growing evidence, however, supports that oil and gas are of biogenic origin and suggests that the maximum depth of oil and gas reservoirs is critically controlled by the depth of active source rocks which generate and expel oil and gas in sedimentary basins (Tissot and Welte, 1978;Durand, 1980;Hunt, 1996).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The dead line for oil and gas and implication for fossil resource prediction

Pang

Jia

Zhang

et al. 2020

Earth Syst. Sci. Data

View full text Add to dashboard Cite

Abstract. Fossil fuel resources are invaluable to economic growth and social development. Understanding the formation and distribution of fossil fuel resources is critical for the search and exploration of them. Until now, the vertical distribution depth of fossil fuel resources has not been confirmed due to different understandings of their origins and the substantial variation in reservoir depths from basin to basin. Geological and geochemical data of 13 634 source rock samples from 1286 exploration wells in six representative petroliferous basins were examined to identify the maximum burial depth of active source rocks in each basin, which is referred to in this study as the active source rock depth limit (ASDL). Beyond the ASDL, source rocks no longer generate or expel hydrocarbons and become inactive. Therefore, the ASDL also sets the maximum depth for fossil fuel resources. The ASDLs of basins around the world are found to range from 3000 to 16 000 m, while the thermal maturities (Ro) of source rocks at the ASDLs are almost the same, with Ro ≈3.5±0.5 %. The Ro of 3.5 % can be regarded as a general criterion to identify ASDLs. High heat flow and more oil-prone kerogen are associated with shallow ASDLs. In addition, tectonic uplift of source rocks can significantly affect ASDLs; 21.6 billion tons of reserves in six representative basins in China and 52 926 documented oil and gas reservoirs in 1186 basins around the world are all located above ASDLs, demonstrating the universal presence of ASDLs in petroliferous basins and their control on the vertical distribution of fossil fuel resources. The data used in this study are deposited in the repository of the PANGAEA database at: https://doi.org/10.1594/PANGAEA.900865 (Pang et al., 2019).

show abstract

Section: Asdls In the Six Representative Basinsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The dead line for oil and gas and implication for fossil resource prediction

Pang

Jia

Zhang

et al. 2020

Earth Syst. Sci. Data

View full text Add to dashboard Cite

show abstract

“…A large number of light hydrocarbons, which can reach C 12 , were lost during sampling, storage, sample preparation and analysis (Jarvie, 2014; Jiang, Chen, et al, 2016; Jiang, Pang, et al, 2016). Therefore, calibration of the lost light hydrocarbons is required.…”

Section: Methodsmentioning

confidence: 99%

Natural gas potential of Neogene source rocks in the Yiliping area, Qaidam Basin: Using an improved hydrocarbon generation and expulsion model based on least‐squares Monte Carlo

Shao

et al. 2023

Geological Journal

View full text Add to dashboard Cite

The Neogene petroleum system in the Yiliping area of the Qaidam Basin presents great prospects for natural gas exploration. However, its natural gas potential, including the source rock characteristics, is insufficient. Due to a lack of geological constraints, the hydrocarbon generation and expulsion (HGE) model, which is widely used in resource potential evaluation, may be unable to obtain optimal parameters. Here, we propose an improved HGE model based on least‐squares Monte Carlo to assess the HGE characteristics and natural gas resource potential of the Neogene source rocks in the Yiliping area by combining geological and geochemical investigations. The findings show that the Neogene source rock is effective and has significant potential for natural gas generation. Algae and bacteria, which were deposited in a saline and anoxic environment, are the primary sources of organic matter in Neogene source rock (primarily Type II and Type III). Modelling work suggests that Type II and III kerogen of Neogene source rock reach hydrocarbon generation threshold (HGT) at Ro = 0.38% and Ro = 0.49% and reach hydrocarbon expulsion threshold (HET) at Ro = 0.45% and Ro = 0.55%. The maximum HGE intensities are 3400 × 104 and 3378 × 104 t/km2. The extra‐source natural gas and shale gas resource potentials are predicted to be 2.05 × 1012 m3 to 4.11 × 1012 m3 and 7.03 × 1012 m3. The findings will guide future Neogene natural gas exploration in the Yiliping area of the Qaidam Basin.

show abstract

“…China is rich in lacustrine shale oil resources with a recoverable amount of 43.5×10 8 t, ranking the third in the world (EIA 2008). which were found in the Dongying Depression (Wang et al 2015a), Dongpu Depression (DD) (Wang et al , 2015a, Cangdong Sag (Zhao et al 2019), and Zhanhua Depression (Li et al 2017) in Bohai Bay Basin, the Bohai Sea area (Jiang et al 2016), and the Qingshankou Formation in Songliao Edited by Jie Hao and Chun-Yan Tang Basin (Liu et al 2017). In particular, for the Kongdian Formation in Cangdong Sag, the natural daily yields of two horizontal shale oil wells GD-1701H and GD1702H achieved 20-30 m 3 for more than 300 days by now.…”

Section: Introductionmentioning

confidence: 95%

Key factors controlling shale oil enrichment in saline lacustrine rift basin: implications from two shale oil wells in Dongpu Depression, Bohai Bay Basin

Pang

Jiang

et al. 2021

Pet. Sci.

View full text Add to dashboard Cite

Comparative analyses of petroleum generation potential, reservoir volume, frackability, and oil mobility were conducted on 102 shale cores from the Dongpu Depression. Results show the shale has high organic matter contents composed of oil-prone type I and type II kerogens within the oil window. Various types of pores and fractures exist in the shale, with a porosity of up to 14.9%. The shale has high brittle mineral contents, extensive fractures, and high potential for oil mobility due to high seepage capacity and overpressure. Although the petroleum generation potential of the shale at Well PS18-8 is relatively greater than that at Well PS18-1, oil content of the latter is greater due to the greater TOC. The porosity and fracture density observed in Well PS18-1 are greater and more conducive to shale oil enrichment. Although the shales in Wells PS18-1 and PS18-8 have similar brittle mineral contents, the former is more favorable for anthropogenic fracturing due to a higher preexisting fracture density. Besides, the shale at Well PS18-1 has a higher seepage capacity and overpressure and therefore a higher oil mobility. The fracture density and overpressure play key roles in shale oil enrichment.

show abstract

Comprehensive assessment of source rocks in the Bohai Sea area, eastern China

Cited by 50 publications

References 10 publications

The dead line for oil and gas and implication for fossil resource prediction

The dead line for oil and gas and implication for fossil resource prediction

Natural gas potential of Neogene source rocks in the Yiliping area, Qaidam Basin: Using an improved hydrocarbon generation and expulsion model based on least‐squares Monte Carlo

Key factors controlling shale oil enrichment in saline lacustrine rift basin: implications from two shale oil wells in Dongpu Depression, Bohai Bay Basin

Contact Info

Product

Resources

About