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The Middle and Lower Cambrian salt tectonics in the central Tarim Basin,China:A case study based on strike-slip fault characterization

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Energy Geoscience 2024年第2期5卷 53-61页

作者： Qing Bian Jibiao Zhang Cheng Huang SINOPEC Petroleum Exploration and Production Research Institute BeijingChina SINOPEC Northwest Oilfield Company UrumuqiChina

Due to the considerable depth of the salt layers and the lack of calibration by exploratory drilling,the interpretation of the Middle and Lower Cambrian salt formations in the central Tarim Basin poses a *** this paper,we apply the coupling and decoupling deformation theory in salt tectonics to analyze the No.7 fault mapped in the seismic datasets by the response characteristics of the Middle and Lower Cambrian *** quantifying the stratigraphic framework of the Middle and Lower Cambrian strata,we define the position of the salt layer with the seismic *** decoupling is observed in the Middle and Lower Cambrian sequences in the Shuntuoguole Low Uplift,while deformation coupling is observed in these two sequences in the Shaya Uplift.

关键词： Tarim Basin salt tectonics Strike-slip fault Structural analysis Seismic interpretation of decoupling zone

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salt tectonics and Basin Evolution in the Gabon Coastal Basin,West Africa

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Journal of Earth Science 2013年第6期24卷 903-917页

作者：陈安清金宠楼章华陈洪德徐胜林黄可可胡思涵 Institute of Sedimentary Geology Chengdu University of Technology Zhejiang Institute of Geology and Mineral Rescources Ocean College Zhejiang University

The Gabon Coastal Basin is a typical saliferous basin located in the middle portion of the West African passive continental margin. Complex salt tectonics make sedimentary sequences and structural frameworks difficult to interpret and can lead to difficulties in construction of balanced cross-sections and reconstruction of basin evolutionary processes. Sedimentary facies and salt structur- al patterns displaying zonation are based on seismic reflection profiles and drilling data. Two near-vertical fault systems, NW-SE and NE-SW, caused basin to be subdivided E-W zoning and N-S partitioning. Scarp slopes and extension faults formed in the Hinge belt III zone where salt diapir piercement occurred and numbers of salt pillars, salt stocks and salt rollers developed under transten- sion of coupled near-orthogonal fault systems. The zone east of Hinge belt III is characterized by small-scale salt domes and salt pillows. To the west are large-scale salt walls and salt bulge anticlines caused by diapirism promoted by tension and torsion that also resulted in formation of numerous salt pillars, salt stocks and salt rollers. Our modeling of salt tectonic structures indicates that they were produced by plastic rheological deformation of salt under regional stress fields that varied during three distinct phases of extension, compression and re-activation. Hinge belt III was active from Coniacian to Early Eocene, which was a critical period of formation of salt structures when many extension-related salt structures formed and salt diapirism controlled the distribution of turbidite fans. Rootless extrusion-related salt stocks developed throughout the Late Eocene to Early Oligocene as a result of lo- cal ephemeral low-intensity tectonic inversion. Post Oligocene salt diapirism was weak and salt tecton- ics had a weak influence on sedimentation. Balanced cross-sections of two saliferous horizons crossing different tectonic units from east to west reveal that the basin tectonic evol

关键词： salt tectonics basin evolution,Gabon Coastal Basin passive margin Africa,South Atlantic Ocean.

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Comparison of Kuqa foreland basin with Persian Gulf Basin in salt tectonics

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Global Geology 2007年第2期10卷 156-165页

作者： Guimei WAN Liangjie TANG Wenzheng JIN Basin and Reservoir Research Centre China University of Petroleum Beijing 102249 China Key Laboratory for Hydrocarbon Accumulation Mechanism of Ministry of Education ChinaUniversity of Petroleum Ministry of Education Beijing 102249 China

Compared Kuqa foreland basin with Persian Gulf Basin in development of salt layers, salt tectonics, and the relation between salt tectonics and hydrocarbon, it is concluded that the salt diapirs are relative to hydrocarbon. Searching salt diapirs and related traps in Kuqa foreland basin is important. The forming mechanism of salt tectonic in Kuqa foreland basin is different from that of Hormuz Series, but similar to that of Lower Fars Series/Gachsaran Formation. Inspired by the role of salt tectonics of Lower Fars Series/Gaehsaran Formation in hydrocarbon accumulation, the authors considered that the exploration below salt layer should be enforced, and the traps below salt layer in the southern part of the Kuqa foreland basin would be found where salt layer is thicker. On the contrary, the traps should be found both above and below the salt layer in front of the northern mountain where salt layer is thin. The Triassic and Jurassic source rocks are rich in this area with great exploration prospective.

关键词： Kuqa foreland basin Persian Gulf Basin salt tectonics comparison

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Turbidite Petroleum Geology Updates in the Deepwater and Subsalt Gulf of Mexico

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Journal of Earth Science and Engineering 2014年第9期4卷 517-543页

作者： Fuge Zou Roger Slatt Marathon Oil Corporation Oklahoma City 73132 USA Conoco Phillips School of Geology and Geophysics University of Oklahoma Norman 73019 USA

The past six years （2008-2014） was a prosperous time for exploration and production in the dGOM （deepwater Gulf of Mexico）. Recent exploration and production activities can be divided into three major categories： drilling new wildcat wells, appraising and developing newly discovered fields and enhanced oil recovery of mature fields. Seismic imaging, complex geology, high pressure drilling, greater depth, and higher temperature are key challenges for the exploration and production of dGOM reservoirs. Complex geology includes salt-related structures and traps, reservoir compartmentalization, and the sequence stratigraphy of turbidite reservoirs. Turbidite sequence stratigraphy helps the asset team to fred the best target intervals. Sheet and channelized sandstones with good downdip aquifer support are preferred reservoir conditions. All the drilling, development and production challenges are related to high pressure, greater depth, higher temperature and lack of existing field analogs. Various IOR （improved oil recovery） methods are studied and applied in the development stage of the Wilcox fields, which have an average primary recovery factor of 10%-15%. With ideal tabular reservoir geometry and IOR methods, recovery factor of the Wilcox reservoirs can reach up to 42% of OOIP （origional oil in place） through the field life cycle.

关键词： Deepwater Gulf of Mexico turbidites salt tectonics petroleum geology exploration and production.

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