Features and genesis of Paleogene high-quality reservoirs in lacustrine mixed siliciclastic–carbonate sediments, central Bohai Sea, China

Zheng-xiang, LU; Zhang, Shunli; Chao, Yin; Meng, Hailong; Song, Xiaozhen; Zhang, Jian

doi:10.1007/s12182-016-0147-9

Cited by 12 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the hydrocarbon generation is expected to be different. However, this issue has not been well studied because produced oils in most cases are a mixture derived both from carbonate and from argillaceous source rocks, as outlined above (Lü et al 2017). Thus, the majority of research into hydrocarbon generation of carbonate source rock is mainly based on thermal simulation experiments.…”

Section: Characteristics and Models Of Hydrocarbon Generationmentioning

confidence: 99%

A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

et al. 2019

View full text Add to dashboard Cite

Carbonates have been known to act as hydrocarbon source rocks, but their basic geochemical and associated hydrocarbon generation characteristics remain not well understood as they occur with argillaceous source rocks in most cases, and the hydrocarbon generation from each rock type is difficult to distinguish, forming one of puzzling issues within the field of petroleum geology and geochemistry. To improve the understanding of this critical issue, this paper reviews recent advances in this field and provides a summary of key areas that can be studied in future. Results show that carbonate source rocks are generally associated with high-salinity environments with low amounts of terrestrial inputs and low dissolved oxygen contents. Petrographically, these source rocks are dark gray or black, fine-grained, stratified, and contain bacterial and algal bioprecursors along with some other impurities. They generally have low organic matter contents, although these can vary significantly in different cases (e.g., the total organic carbon contents of marine and lacustrine carbonate source rocks in China are generally 0.1%-1.0% and 0.4%-4.0%, respectively). These rocks contain type I and type II kerogen, meaning there is a lack of vitrinites. This means that assessment of the maturity of the organic matter in these sediments needs to use non-traditional techniques rather than vitrinite reflectance. In terms of molecular geochemistry, carbonate source rocks have typical characteristics indicative of generally reducing and saline environments and lower organism-dominated bioprecursors of organic matter, e.g., high contents of sulfur compounds, low Pr/Ph ratios, and dominance of n-alkanes. Most of the carbonate source rocks are typically dominated by D-type organic facies in an oxidized shallow water mass, although high-quality source rocks generally contain A-and B-type organic facies in saline lacustrine and marine-reducing environments, respectively. The hydrocarbon generation model for the carbonate source rocks can involve early, middle, and late stages, with a diversity of hydrocarbons within these rocks, which can be aggregated, adsorbed, enclosed within minerals, or present as inclusions. This in turn implies that the large-scale hydrocarbon expulsion from these rocks is reliant on brittle deformation caused by external forces. Finally, a number of aspects of these source rocks remain unclear and need further study, including the effectiveness of carbonates as hydrocarbon source rocks, bioprecursors, and hydrocarbon generation models of carbonate source rock, and the differences between marine and lacustrine carbonate source rocks.

show abstract

Section: Characteristics and Models Of Hydrocarbon Generationmentioning

confidence: 99%

A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The top strata of E2s4 are composed of gray mudstone, oil shale intercalated with sandstone, and thin layers of limestone. The sedimentary environment is interpreted as a shallow lake (Song et al 2012;Lu et al 2017).…”

Section: Stratigraphymentioning

confidence: 99%

Distribution and controls of petroliferous plays in subtle traps within a Paleogene lacustrine sequence stratigraphic framework, Dongying Depression, Bohai Bay Basin, Eastern China

et al. 2019

View full text Add to dashboard Cite

The characteristics of petroliferous plays in subtle traps within a sequence stratigraphic framework in the Dongying Depression are investigated in this study. Sand bodies within lowstand systems tracts (LSTs) of sequences, comprising incisedchannel fills, sublacustrine fans, deltas in LSTs, controlled by syndepositional normal faults, and sand bodies within transgressive systems tracts (TSTs) to early highstand systems tracts (HSTs), consisting of beach bars, and turbidites, controlled by the prodelta slope, paleorelief, and syndepositional normal faults, are good subtle reservoirs. Mudstones and shale of deep lake subfacies in TSTs to early HSTs of sequences are source and cap rocks. Abnormal overpressure is the dominant dynamic factor for hydrocarbon migration from source rock to the subtle traps. Normal faults, sand bodies, and unconformities function as conduit systems. Sand bodies distributed in the abnormal overpressure source rocks within LSTs to early HSTs are petroliferous plays in lithologic traps. The petroliferous plays in stratigraphic traps are controlled by unconformities at margins of the Depression.

show abstract

Unconformity-controlled dissolution contributes to reservoirs in the carbonate-rich Permian Fengcheng Formation, northwestern Junggar Basin, China

Cao

Qiu

et al. 2020

Carbonates Evaporites

View full text Add to dashboard Cite

Features and genesis of Paleogene high-quality reservoirs in lacustrine mixed siliciclastic–carbonate sediments, central Bohai Sea, China

Cited by 12 publications

References 20 publications

A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

Distribution and controls of petroliferous plays in subtle traps within a Paleogene lacustrine sequence stratigraphic framework, Dongying Depression, Bohai Bay Basin, Eastern China

Unconformity-controlled dissolution contributes to reservoirs in the carbonate-rich Permian Fengcheng Formation, northwestern Junggar Basin, China

Contact Info

Product

Resources

About