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Structural characteristics and deep-water hydrocarbon accumulation model of the Scotian Basin, Eastern Canada

Energy Geoscience 2023年第3期4卷 71-79页

作者： Gaokui Wu Fanjun Kong Naxin Tian Tianbi Ma Chongzhi Tao Petroleum Exploration and Production Research Institute SINOPECBeijing102206China

Commercial hydrocarbon reservoirs have been discovered in shallow-water areas of the Scotian Basin, Eastern Canada. However, knowledge about the structure and hydrocarbon accumulation characteristics of the basin is still insufficient, which constrains the oil and gas exploration in deep-water areas. Based on comprehensive data of magnetic anomalies, seismic survey, and drilling, this study determines the structure characteristics of the Scotian Basin and its hydrocarbon accumulation conditions in deep waters and evaluates the deep-water hydrocarbon exploration potential. The transform faults and basement structures in the northern basin control the sedimentary framework showing thick strata in east and thin strata in west of the basin. The bowl-shaped depression formed by thermal subsidence during the transitional phase and the confined environment (micro basins) caused by salt tectonics provide favorable conditions for the development of source rocks during the depression stage (also referred to as the depression period sequence) of the basin. The progradation of large shelf-margin deltas during the drift phase and steep continental slope provide favorable conditions for the deposition of slope-floor fans on continental margins of the basin. Moreover, the source-reservoir assemblage comprising the source rocks within the depression stage and the turbidite sandstones on the continental margin in the deep waters may form large deep-water turbidite sandstone reservoirs. This study will provide a valuable reference for the deep-water hydrocarbon exploration in the Scotian Basin.

关键词： Transform fault Salt tectonic hydrocarbon accumulation model Deep-water turbidite sandstone Scotian basin

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Whole petroleum system and hydrocarbon accumulation model in shallow and medium strata in northern Songliao Basin,NE China

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Petroleum Exploration and Development 2023年第4期50卷 784-797页

作者： ZHANG He WANG Xiaojun JIA Chengzao LI Junhui MENG Qi’an JIANG Lin WANG Yongzhuo BAI Xuefeng ZHENG Qiang PetroChina Daqing Oilfield Company Limited Daqing 163458China China National Petroleum Corporation Beijing 100724China Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Limited Daqing 163712China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Exploration Department of PetroChina Daqing Oilfield Company Limited Daqing 163453China

Based on the oil and gas exploration practice in the Songliao Basin,combined with the latest exploration and development data such as seismic,well logging and geochemistry,the basic geological conditions,oil and gas types and distribution characteristics,reservoir-forming dynamics,source-reservoir relationship and hydrocarbon accumulation model of the whole petroleum system in shallow and medium strata in the northern part of Songliao Basin are systematically *** shallow-medium strata in northern Songliao Basin have the conditions for the formation of whole petroleum system,with sufficient oil and gas sources,diverse reservoir types and well-developed transport system,forming a whole petroleum system centered on the source rocks of the Cretaceous Qingshankou *** types of oil and gas resources in the whole petroleum system are correlated with each other in terms of depositional system,lithologic association and physical property changes,and they,to a certain extent,have created the spatial framework with orderly symbiosis of shallow-medium conventional oil reservoirs,tight oil reservoirs and shale oil reservoirs in northern Songliao ***,the resources are endowed as conventional oil above source,shale oil/tight oil within source,and tight oil below ***,conventional oil,tight oil,interlayer-type shale oil,and pure shale-type shale oil are developed in an orderly way,from the margin of the basin to the center of the *** hydrocarbon accumulation models are recognized for the whole petroleum system in northern Songliao Basin,namely,buoyancy-driven charging of conventional oil above source,retention of shale oil within source,and pressure differential-driven charging of tight oil below source.

关键词： Songliao Basin super basin whole petroleum system conventional oil reservoir tight oil shale oil hydrocarbon accumulation model orderly distribution differential accumulation

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hydrocarbon Distribution and accumulation model in the South of Lixian Slope,Raoyang Subbasin

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Journal of Earth Science 2013年第6期24卷 1033-1043页

作者：杨帆邹才能侯连华于兴河李胜利 Research Institute of Petroleum Exploration & Development PetroChina School of Energy Resources China University of Geosciences (Beijing)

The exploration level in the south of Lixian slope is relatively low that causes the hydrocarbon distribution pattern and hydrocarbon accumulation model of discovered reservoirs un- clear. It was assumed that the hydrocarbon accumulation model was mainly ＂stepped-like＂ type, but this model is contradicted with newly discovered reservoirs. Through comprehensive study of faults ac- tivity stages and depositional system, it can be concluded that the late period developed and late period attenuation faults act as the vertical migration path, while connected sandbodies provide lateral migra- tion path for oil and gas. Combining with the distribution of the known reservoirs and oil-source corre- lation, the hydrocarbon accumulation model in the south of Lixian slope is characterized by dual source rocks generating; connected sandbodies parallel transporting; shallow fault nose traps accumulating. This model reveals the direction and clue of the following exploration and development, which are based on shallow formation; finding subtle structure traps by fine seismic interpretation and accurate sedimentary microfacies characterization.

关键词： south of Lixian slope hydrocarbon distribution hydrocarbon accumulation model pa-rallel migration.

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Petroleum Geology in Deepwater Settings in a Passive Continental Margin of a Marginal Sea:A Case Study from the South China Sea

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 1-20页

作者： ZHANG Gongcheng FENG Congjun YAO Xingzong JI Mo YANG Haizhang QU Hongjun ZENG Qingbo ZHAO Zhao SUN Rui State Key Laboratory of Continental Dynamics Northwest UniversityXi'an 710069China Department of Geology Northwest UniversityXi'an 710069China CNOOC Research Institute Co. Ltd.Beijing 100028China

Deepwater oil and gas exploration has become a global hotspot in recent years and the study of the deep waters of marginal seas is an important frontier research *** South China Sea(SCS)is a typical marginal sea that includes Paleo SCS and New SCS tectonic *** latter includes continental marginal rifting,intercontinental oceanic expansion and oceanic shrinking,which controlled the evolution of basins,and the generation,migration and accumulation of hydrocarbons in the deepwater basins on the continental margin of the northern *** the Paleogene,the basins rifted along the margin of the continent and were filled mainly with sediments in marine-continental transitional *** the Neogene–Quaternary,due to thermal subsidence,neritic-abyssal facies sediments from the passive continental margin of the SCS mainly filled the *** source rocks include mainly Oligocene coal-bearing deltaic and marine mudstones,which were heated by multiple events with high geothermal temperature and terrestrial heat flow,resulting in the generation of gas and *** faults,diapirs and sandstones controlled the migration of hydrocarbons that accumulated principally in a large canyon channel,a continental deepwater fan,and a shelf-margin delta.

关键词： diapir deepwater fan gas-rich sag hydrocarbon accumulation model Wilson cycles South China Sea

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Exploration progress of the Paleogene in Jiyang Depression,Bohai Bay Basin

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Energy Geoscience 2023年第1期4卷 42-50页

作者： Lichi Ma Mingshui Song Yongshi Wang Yanguang Wang Huimin Liu SINOPEC Shengli Oilfield Branch Company DongyingShandong257015China Petroleum Exploration and Production Research Institute SINOPECBeijing102206China

With increased exploration in the faulted basins of eastern China,petroleum exploration in this region has been challenged by unclear remaining petroleum resources distribution,complex reservoir and hydrocarbon enrichment patterns,and lacking of suitable exploration *** at resolving these problems,studies on source rocks,reservoirs,hydrocarbon accumulation and geophysical prospection were carried out by laboratory analysis,reservoir anatomy,and seismic analysis.A highlyefficient hydrocarbon generation/expulsion model of source rocks in saline environment was established,which aided in the discovery of a new set of source rocks in the Jiyang *** study also reveals the formation process of high-quality reservoir by alternating acid and alkaline fluids during deposition and diagenesis,and pattern of secondary pores development in deep clastic *** the fine anatomy of the oil reservoirs,an orderly distribution pattern of the oil reservoirs is established,and the potential exploration targets in the undrilled area are *** addition,single-point highdensity seismic acquisition and high-resolution imaging technologies are developed,enabling fine and efficient exploration in areas with high exploration *** research result plays a leading and demonstrative role in the fine and efficient exploration of faulted basins in eastern China.

关键词： hydrocarbon generation/expulsion model Saline environment Acid and alkaline fluids hydrocarbon accumulation model Faulted basin

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