Effect of marine incursion on the formation of lacustrine source rocks: A case study of mudstones from the third member of the Shahejie Formation in the southwestern Bozhong Sag, Bohai Bay Basin, China

Hao, 2011, Lacustrine source rock deposition in response to co-evolution of environments and organisms controlled by tectonic subsidence and climate, Bohai Bay Basin, China, Org. Geochem., 42, 323, 10.1016/j.orggeochem.2011.01.010 Zhu, 2009 Gao, 1986, On correlations between transgressions and climatic phases since late Middle Pleistocene based on data of drilling hole P8 in Tianjin, Mar. Geol. Quat. Geol., 6, 53 Zhuang, 1999, Division and environmental evolution of Late Quaternary marine beds of S3 hole in the Bohai Sea, Mar. Geol. Quat. Geol., 19, 27 Yuan, 2005, Research development and prospects on Paleogene sea transgression in Bohai Bay Basin, Acta Sedimentol. Sin., 23, 604 Yuan, 2007, Discovery and significance of Paleogene ichnofossil Paleodictyon in the dongying sag, Bohai Bay Basin, Chin. J. Geol., 42, 779 Li, 1997, Environment of foraminiafera of Paleogene in east China, J. Univ. Pet., China (Ed. Nat. Sci.), 21, 1 Wei, 2021, Paleosalinity proxies and marine incursions into the Paleogene Bohai Bay Basin lake System,northeastern China, Acta Sedimentol. Sin., 39, 571 Peng, 1989, A preliminary discussion about transgressions and hydrocarbons of Shahejie Formation, Mar. Geol. Quat. Geol., 9, 17 Xu, 2019, The occurrence of isorenieratane and 24-n-propylcholestanes in Paleogene lacustrine source rocks from the Dongying Depression, Bohai Bay Basin: implications for bacterial sulfate reduction, photic zoneeuxinia and seawater incursions, Org. Geochem., 127, 59, 10.1016/j.orggeochem.2018.11.008 Chen, 2012, Deposition environment of the lacustrine lolomite in sha-1 lower submember of the qi-kou Sag,Huanghua depression, Acta Pet. Sin., 86, 1679 Wu, 2015, Recognition of marginal to shallow marine deposits in Shahejie Formation (Palaeogene) Dongpu Depression and its reservoir significance, Acta Sedimentol. Sin., 33, 364 Wang, 2015, Element geochemistry of the second member of Kongdian Formation in southern Huanghua Depression and its implications, Mar. Geol. Quat. Geol., 35, 61 Zhao, 2021, Geochemical and palynological characteristics of the Paleogene source rocks in the northeastern Laizhouwan Sag, Bohai Bay Basin, China: hydrocarbon potential, depositional environment, and factors controlling organic matter enrichment, Mar. Petrol. Geol., 124, 10.1016/j.marpetgeo.2020.104792 Wang, 2022, The compositions of biomarkers and macerals in the first member of the Shahejie Formation in the Liaodong Bay subbasin, Bohai Bay Basin: implications for biological sources and seawater incursions, J. Petrol. Sci. Eng., 218, 10.1016/j.petrol.2022.110947 Ren, 2015, Characteristics and distribution of Paleogene high-quality source rocks in Bozhong Sag, Petrol.Geol. Recovery Efficiency, 22, 5 Huang, 2022, Characteristics and geological significance of biomarkers from the characteristics and geological significance of biomarkers from the Paleogene source rocks in Bozhong Sag, Bohai Bay Basin, Bull. Geol. Sci. Technol., 41, 180 Geng, 2021, The palaeolake environment and development model of Paleogene high quality source rocks in the Bozhong Depression, Journal of Northeast Petroleum University, 45, 4 Liu, 2000, 54 Zhao, 2000, Regional distribution regularity and its controlling factors of oil and gas bearing series in Bohai Bay Basin, Acta Pet. Sin., 21, 10 Tong, 2022, Gas source of BZ19-6 condensate gas field in Bozhong sag, Bohai sea area, Petrol. Geol. Exp., 44, 324 Xue, 2021, Recognition of oil and gas accumulation of Mesozoic covered buried hills in Bohai Sea area and the discovery of BZ13-2 oilfield, China Offshore Oil Gas, 33, 13 Wang, 2021, Differential tectonic activities in Paleocene-Eocene and its bearing on the evolution of sedimentary fillings in the Southwest Bozhong Sag, Marine Geol. Front., 37, 30 Huang, 2017, Sedimentary characteristics of nearshore subaqueous fan of the third member of Shahejie Formation in Bozhong sag 25-1 oil field of bohaiwan basin, J. Northeast Petrol. Univ., 41, 32 Peters, 2005 Wang, 1994, Organic petrologic methodology for evaluation of hydrocarbon generation potential in source rocks, Acta Pet. Sin., 15, 9 Volkman, 2005, Sterols and other triterpenoids: source specificity and evolution of biosynthetic pathways, Org. Geochem., 36, 139, 10.1016/j.orggeochem.2004.06.013 Wang, 2006, 2-Methylhopanes as biomarkers for depositonal environment in the lacustrine basin, Acta Geol. Sin., 80, 902 Xiao, 2019, Distribution patterns and geochemical implications of C19-C23tricyclic terpanes in source rocks and crude oils occurring in various depositional environments, Geochimica, 48, 161 Raederstorff, 1984, Sterols of the unicellular algae Nematochrysopsis roscoffensis and Chrysotila lamellosa: isolation of (24E)-24-n-propylidenecholesterol and 24-n-propylcholesterol, Phytochemistry, 23, 2835, 10.1016/0031-9422(84)83024-1 Moldowan, 1990, Sedimentary 24-n-propylcholestanes,molecular fossils diagnostic of marine algae, Science, 247, 309, 10.1126/science.247.4940.309 Liu, 2013, The role of algal blooms in the formation of lacustrine petroleum source rocks: evidence from Jiyang Depression, Bohai Gulf Rift Basin, eastern China, Palaeogeogr. Palaeoclimatol. Palaeoecol., 388, 15, 10.1016/j.palaeo.2013.07.024 Nesbitt, 1982, Early Proterozoic climates and plate motions inferred from major element chemistry of lutites, Nature, 299, 715, 10.1038/299715a0 Fedo, 1995, Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols,with implications for paleoweathering conditions and provenance, Geology, 23, 921, 10.1130/0091-7613(1995)023<0921:UTEOPM>2.3.CO;2 Huang, 2022, Sedimentary environment and formation mechanism of organic-rich mudstone in the third member of Shahejie Formation in the southwestern Bozhong Sag, Bohai Bay Basin, Nat. Gas Geosci., 33, 2032 Wu, 2019, Molecular geochemical characteristics of source rocks in the 5th member of upper triassic xujiahe formation, xinchang gas field, west sichuan depression, Earth Sci., 44, 859 Volkman, 1990, A new source of 4-methyl sterols and 5a (H)-stanols in sediments: prymnesiophyte microalgae of the genus Pavlova, Org. Geochem., 489, 10.1016/0146-6380(90)90094-G Huang, 1989, On origin of 4-Methyl steranes and pregnanes, Petrol. Explor. Dev., 16, 8 Shang, 1984, Oleanane in crude oil and source rock of terrestrial facies and its geological significance, Acta Pet. Sin., 16, 37 Bao, 2007, Distribution and composition of biomarkers in crude oils from different sags of Beibuwan Basin, Acta Sedimentol. Sin., 25, 646 Moldowan, 1985, Relationship between petroleum composition and depositional environment of petroleum source rocks, AAPG (Am. Assoc. Pet. Geol.) Bull., 69, 1255 Feng, 1999, Studies on the transgression in eogene period in eastern China, Journal of Xi'an Engineering University, 21, 9 Katz, 1995, Chapter 3: factors controlling the development of lacustrine petroleum source rocks-an update, 61 Erbacher, 2001, Increased thermohaline stratification as a possible cause for an ocean anoxic event in the Cretacous Period, Nature, 409, 325, 10.1038/35053041 Summons, 1992, 2-methylhopanoids as biomarkers for cyanobacterial oxygenic photosynthesis, Nature, 554 Ji, 2012, Lacustrine cyanobacteria from the yanchang formation in ordos basin and its implication of oil source, Acta Micropalaeontol. Sin., 29, 270