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Study on crustal thickness and the prediction of prolific depressions:the Bohai Basin as an example

Acta Oceanologica Sinica 2024年第4期43卷 92-104页

作者： Mengke Cai gongcheng zhang Wanyin Wang Dingding Wang College of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China Key Laboratory of Marine Geology and Environment Chinese Academy of SciencesQingdao 266071China National Engineering Research Center of Offshore Oil and Gas Exploration Beijing 100028China Department of Earth Environment and Resources SciencesUniversity of Naples FedericoⅡNaples 80138Italy

The deep crustal structure is closely related to oil and gas *** the oil and gas enrichment of depressions based on the Moho depth and crustal thickness is a promising research topic with significant implications for guiding exploration in petroliferous *** this study,seismic data were used as a constraint on the use of satellite gravity anomaly inversion to obtain the distribution of Moho depth and crustal thickness in the Bohai *** factors were calculated to analyze the differential distribution of deep crustal structural *** indicators,including the minimum Moho depth,minimum crustal thickness,sum of Moho stretching factors,and sum of crustal stretching factors,were *** component analysis was applied to reduce the dimensionality of the multi-indicator system and obtain an oil and gas enrichment score for quantitative prediction of favorable prolific *** deviation between the inverted Moho depth and seismic constraints was small;thus,the data effectively reflect the variations in the characteristics of each *** analysis revealed significant statistical features related to the minimum Moho depth/crustal thickness and the sum of Moho/crustal stretching factors associated with prolific *** on the oil and gas enrichment score,the depressions were classified into four categories related to their different deep crustal structural *** active ClassⅠ,ClassⅡ,and ClassⅢdepressions are predicted to be favorable prolific *** study expands the research on quantitatively predicting favorable prolific depressions in the Bohai Basin using the deep crustal structure and can contribute to reducing production costs and improving exploration efficiency in future explorations.

关键词： Bohai Basin satellite gravity anomaly deep crustal structure Moho depth crustal thickness favorable prolific depression

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渤海湾盆地海域白垩系大中型火山岩油气藏形成条件

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石油勘探与开发 2024年第3期51卷 467-477页

作者：徐长贵张功成黄胜兵单玄龙李嘉慧中国海洋石油集团有限公司北京100010 中海油研究总院有限责任公司北京100028 吉林大学地球科学学院长春130061 吉林大学未来科学国际合作联合实验室长春130061

基于渤海湾盆地海域中生界油气勘探取得的地质和地球物理资料,以2019年以来发现的火山岩高产工业油气井为依据,系统总结渤海海域白垩系大中型火山岩油气藏的形成条件。研究表明,渤海海域中生界大型中酸性熔岩火山机构和中酸性熔岩复合... 详细信息

基于渤海湾盆地海域中生界油气勘探取得的地质和地球物理资料,以2019年以来发现的火山岩高产工业油气井为依据,系统总结渤海海域白垩系大中型火山岩油气藏的形成条件。研究表明,渤海海域中生界大型中酸性熔岩火山机构和中酸性熔岩复合火山机构是规模性火山岩储层形成的物质基础,火山口-近源相带中发育的溢流相上部亚相和火山通道相隐爆角砾岩亚相是规模性储层的有利发育部位。高孔-中低渗型和中孔-中低渗型两种类型有效储层是大中型火山岩油气藏形成的关键条件,高孔-中低渗型储层由中酸性气孔熔岩或隐爆角砾岩叠加强烈溶蚀作用形成,中孔-中低渗型储层由强烈构造作用叠加流体溶蚀形成。风化作用和构造改造是该区大中型火山岩油气藏的主要成储机制。源内低位“源-储披覆对接型”是该区大中型火山岩油气藏形成的最佳源-储配置关系。渤中凹陷周缘具备有利火山岩相、有效储层和“源-储披覆对接”等有利因素,靠近走滑断裂及其分支断裂的大型中酸性熔岩和复合火山机构是未来勘探的主要地区。

关键词：渤海海域白垩系大中型火山岩油气藏有效储层源-储配置勘探方向

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琼东南盆地“气聚集带”的成藏特征与勘探潜力

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石油学报 2024年第1期45卷 226-240页

作者：张功成纪沫陈莹甘军王东东张春宇中海油研究总院有限责任公司北京100028 中海石油(中国)有限公司海南分公司海南海口570312 山东科技大学地球科学与工程学院山东青岛266590

琼东南盆地是中国近海的一个在浅水区、深水区、超深水区均发现煤型大气田的盆地,探讨其天然气地质特征及勘探新领域具有重要的理论和实际意义。笔者基于区域地质、地震、钻井、地球化学测试等数据分析了琼东南盆地的成藏特征和勘探潜... 详细信息

琼东南盆地是中国近海的一个在浅水区、深水区、超深水区均发现煤型大气田的盆地,探讨其天然气地质特征及勘探新领域具有重要的理论和实际意义。笔者基于区域地质、地震、钻井、地球化学测试等数据分析了琼东南盆地的成藏特征和勘探潜力。研究结果表明:琼东南盆地在崖城组沉积期具有"两隆两坳"的构造格局,崖城组的煤型烃源岩(包括煤系烃源岩和陆源海相烃源岩)是主要的烃源岩,以渐新统崖城组(扇)三角洲为中心的煤型烃源岩的生烃灶,主要沿北部坳陷北缘、中央坳陷南缘和北缘呈串珠状分布;北部坳陷北缘的煤型烃源岩的成熟度低,未进入大量生气阶段;中央坳陷南缘和北缘的煤型烃源岩均已成熟,且已进入大量生气阶段;每个(扇)三角洲发育的煤系烃源岩及其周边的陆源海相泥岩均为1个富气生烃灶。受渐新世煤型烃源岩的生烃灶控制,形成了中央坳陷南缘和北缘2个大型气聚集带;气聚集带中的凸起、断阶带、缓坡带、凹中浊积体等圈闭是煤型天然气的主要勘探领域,勘探前景巨大,天然气资源量预计超过2×10^(12)m^(3)。

关键词：琼东南盆地煤系(扇)三角洲生烃灶气聚集带勘探领域

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渤海湾超级油盆构造演化及其烃源岩发育

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石油勘探与开发 2024年第5期51卷 1008-1023页

作者：张功成佟殿君陈凯刘辉方璇中海油研究总院有限责任公司北京100028 中国地质大学海洋地质资源湖北省重点实验室武汉430074

综合运用渤海湾盆地新采集的高品质地震剖面以及最新的勘探成果资料,通过对各主要层系的地层分布、构造和古地理格局的分析,系统开展渤海湾盆地大地构造演化的动力学研究。结果表明,渤海湾盆地所处的华北克拉通位于古亚洲洋、特提斯洋... 详细信息

综合运用渤海湾盆地新采集的高品质地震剖面以及最新的勘探成果资料,通过对各主要层系的地层分布、构造和古地理格局的分析,系统开展渤海湾盆地大地构造演化的动力学研究。结果表明,渤海湾盆地所处的华北克拉通位于古亚洲洋、特提斯洋和太平洋等3大构造体系域的交接地带,经历了不同期次、不同方向、不同性质构造旋回的交替叠加,主要经历5期盆地构造演化与沉积建造阶段,即中新元古代大陆裂陷槽、早古生代克拉通边缘坳陷碳酸盐岩建造、晚古生代海陆过渡相克拉通内坳陷、中生代陆内走滑-伸展构造和新生代陆内裂陷阶段。盆地的多旋回演化,特别是晚古生代以来所经历的海西、印支、燕山和喜马拉雅等多期挤压、走滑和伸展构造活动,控制了多套优质烃源岩发育、改造和保存,尤以上古生界石炭系—二叠系煤系烃源岩以及古近系世界级特优质湖相烃源岩最为重要,为超级富油气盆地的成藏提供了重要的烃源保障。

关键词：构造演化沉积建造地层分布烃源岩渤海湾盆地超级盆地

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Tectonic Evolution of the Wanan Basin,Southwestern South China Sea

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Acta Geologica Sinica(English Edition) 2014年第4期88卷 1120-1130页

作者： Lü Caili zhang gongcheng YAO Yongjian WU Shiguo CNOOC Research Institute Postdoctoral research Center China University of Petroleum (Beijing) Guangzhou Marine Geological Survey Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences

Quantitative studies on the extension and subsidence of the Wanan Basin were carried out based on available seismic and borehole data together with regional geological data. Using balanced cross-section and backstripping techniques, we reconstructed the stratigraphic deposition and tectonic evolution histories of the basin. The basin formed from the Eocene and was generally in an extensional/transtensional state except for the Late Miocene local compressoin. The major basin extension ocurred in the Oligocene and Early Miocene （before -16.3 Ma） and thereafter uniform stretch in a smaller rate. The northern and middle basin extended intensely earlier during 38.6-23.3 Ma, while the southern basin was mainly stretched during 23.3-16.3 Ma. The basin formation and development are related to alternating sinistral to dextral strike-slip motions along the Wanan Fault Zone. The dominant dynamics may be caused by the seafloor spreading of the South China Sea and the its peripheral plate interaction. The basin tectonic evolution is divided into five phases： initial rifting, main rifting, rift-drift transition, structural inversion, and thermal subsidence.

关键词： tectonic evolution stretch factor Wanan Basin South China Sea

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Cenozoic giant coal-bearing basin belt discovered in China's sea and its adjacent areas

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Acta Oceanologica Sinica 2023年第3期42卷 101-112页

作者： gongcheng zhang Ying Chen Dongdong Wang Zengxue Li College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China Department of Geology Northwest UniversityXi’an 710000China

Sea area is an important area of oil and gas exploration in *** has been found that China's sea area mainly consists of coal type oil and gas,and the exploration of coal-bearing series source rocks has become an important part of oil and gas exploration *** years of comprehensive geological research in China's sea area,it has been revealed that it has undergone multiple occurrences of tectonic opening and closing movements in varying degrees in the Paleogene,forming 26 Cenozoic sedimentary basins of various types,such as active continental margin,passive continental margin,transitional continental margin and drift rift *** the present study,it is observed for the first time that coal type source rocks are mainly developed in 14 continental margin basins in China's sea area,revealing that a very large C-shaped coal-bearing basin group developed there in the ***,based on the coupling analysis of paleoclimate,paleobotany,paleogeography and paleostructure,it is observed that there are five coal-forming periods in China's sea area,namely the Paleocene,Eocene,early Oligocene,late Oligocene and Miocene-Pliocene,and the coal-forming age is gradually new from north to *** is also found that the coal seams in the sea area are mainly developed in three coal-forming environments in Cenozoic,namely delta,fan delta and tidal *** coal seams developed in different environments are characterized by thin thickness,many layers and poor ***,the coal-bearing series source rocks in China's sea area have a wide distribution range,very high thickness and large amount,thus forming a material basis for the formation of rich coal type oil and gas.

关键词： coal-bearing basin belt coal-forming period coal-forming sedimentary environment China's sea area

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Differences of Polygonal Faults with Irregularly Polygonal Geometries: A Case Study from the Changchang Sag of Qiongdongnan Basin, Northern South China Sea

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Journal of Ocean University of China 2023年第1期22卷 119-135页

作者： LI Yufeng PU Renhai zhang gongcheng FAN Xiaowei School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Key Laboratory of Marine Mineral Resources Ministry of Natural ResourcesGuangzhou 510075China CNOOC Research Institute Beijing 100028China Research Institute of Yangchang Petroleum(Group)Co. Ltd.Xi’an 710075China

Polygonal faults(PFs)generally have a classic polygonal geometry in map ***,under the influence of tectonic faults,diapirs,channels,and slopes,the classic polygonal geometry of PFs is not preserved,demonstrating differences(different characters)in map-view 3D seismic data covering an area of 334km^(2) of the Changchang(CC)sag,are used to document the mapview and cross-sectional characteristics of *** data also help investigate the irregularly polygonal geometries of PFs due to the presence of influence factors,such as transtensional faults,submarine fans,channels,diapirs/gas chimneys,and the basal slope within the lower-middle Miocene *** show that various irregularly polygonal geometries of PFs can be classified into enechelon and arcuate PFs,channel-segmenting and-bounding PFs,radial PFs,and rectangular PFs in ***-echelon and arcuate PFs are induced by transtensional faults and exhibit a unique‘flower’structure in NE-and SE-trending cross-sections in the NW area of the study *** finding is documented for the first ***-segmenting PFs occur in the(northwest)low-amplitude muddy channel and are inhibited in the(southeast)high-amplitude sandy channel in the SW *** PFs are radially aligned around a gas chimney/diapir containing some high-amplitude anomalies(HAAs)in the middle *** presence of intrusive sandstones with HAAs along the periphery of the diapirs restricts the occurrence of *** high-amplitude submarine fans act as a mechanical barrier to the propagation of ***,the(moderate)slope in the NE area induces rectangular ***,the geneses of the PFs in the current study are comprehensively *** study adds to our understanding of the differences between PFs with irregularly polygonal geometries.

关键词： channel diapir genesis influence factors northern South China Sea polygonal fault slope transtensional faults

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Relationship between the Extent of Igneous Rocks and Deep Structures as Determined by Gravitational and Magnetic Data in the South China Sea

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 294-304页

作者： YANG Min WANG Wanyin zhang gongcheng MA Jie Institution of Gravity and Magnetic Technology Chang'an UniversityXi'an 710054China Department of Earth Sciences Memorial University of NewfoundlandSt.John'sNewfoundland A1B 3X5Canada CNOOC Research Institute Co. Ltd.Beijing 100028China

The distribution of oil and gas resources in the South China Sea and adjacent areas is closely related to the structural pattern that helped to define the controlling effect of deep processes on oil-bearing *** rocks can record important information from deep *** structures such as faults,basin uplift and depression,Cenozoic basement and magnetic basement are all the results of energy exchange within the *** study of the relationship between igneous rocks and deep structures is of great significance for the study of the South China *** using the minimum curvature potential field separation technique and the correlation analysis technique of gravitational and magnetic anomalies,the fusion of gravitational and magnetic data reflecting igneous rocks can be obtained,through which the igneous rocks with high susceptibility/high density or high susceptibility/low density can be *** this study area,igneous rocks do not develop in the Yinggehai basin,Qiongdongnan basin,Zengmu basin and Brunei-Sabah basin whilst igneous rocks with high susceptibility/high density or high susceptibility/low density are widely-developed in other *** undeveloped igneous areas,faults are also undeveloped the Cenozoic thickness is greater,the magnetic basement depth is greater and the Cenozoic thickness is highly positively correlated with the magnetic basement *** igneously developed regions,the distribution pattern of the Qiongtai block is mainly controlled by primary faults,while the distribution of the Zhongxisha block,Xunta block and Yongshu-Taiping block is mainly controlled by secondary faults,the Cenozoic thickness having a low correlation with the depth of the magnetic basement.

关键词： igneous rocks fusion of gravity and magnetic data deep structures South China Sea

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Seismic Facies in a Deepwater Area of a Marine Faulted Basin:Deepwater Area of the Paleogene Lingshui Formation in the Qiongdongnan Basin

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Acta Geologica Sinica(English Edition) 2012年第2期86卷 473-483页

作者： CHEN Huanqning ZHU Xiaomin zhang gongcheng zhang Xilin zhang Qin Research Institute of Petroleum Exploration andDevelopment PetroChinaBeijing 100083China College of Geosciences China University of PetroleumBeijing 102249China Research Institute China National Offshore Oil Corp.Beijing 100027China

In recent years, deep water areas have become popular exploration fields because of their abundant hydrocarbon resource potential. There are only relatively poor planar seismic profiles and no wells for deepwater areas of the Lingshui Formation in the Qiongdongnan Basin. A lot of faults developed and strata are fragmented due to high temperatures and high pressure, and this has resulted in dim sequence boundaries. Based on seismic data of the deepwater area and well data of bordering shallow water areas, Lingshui Formation was divided into four third class sequences; namely SI, SII, SIII and SIV, and the three-dimensional isochronous stratigraphic framework of the Lingshui Formation in the studied area was shaped. Based mainly on seismic attributes such as amplitude, continuity, internal structure and external shape, six typical seismic facies were identified, including mat-shaped, filling, wedge-shaped, foreset, moundy-shaped and lenticular-shaped, and a seismic facies distribution map was subsequently drawn. With studies on wells of bordering shallow water areas, regional sedimentary characteristics, and isopach map as references, sedimentary planar distribution features were analyzed. The deepwater area of the Lingshui Formation has mainly developed littoral and shallow sea. Sandstone bodies of fan delta, braided river delta, slope fan, basin floor fan, and turbidite fan are at an interdigitate junction to marine hydrocarbon source rocks and thus are favorable prospecting targets.

关键词： seismic sequence seismic facies sedimentary facies deepwater area faulted basin Paleogene

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Characteristics and origins of middle Miocene mounds and channels in the northern South China Sea

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Acta Oceanologica Sinica 2021年第2期40卷 65-80页

作者： Yufeng Li gongcheng zhang Renhai Pu Hongjun Qu Huailei Shen Xueqin Zhao School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Continental Dynamics Xi’an 710069China Department of Geology Northwest UniversityXi’an 710069China Key Laboratory of Marine Mineral Resources Ministry of Natural ResourcesGuangzhou 510075China CNOOC Research Institute Co. Ltd.Beijing 100028China

Numerous elongated mounds and channels were found at the top of the middle Miocene strata using 2D/3D seismic data in the Liwan Sag of Zhujiang River Mouth Basin(ZRMB)and the Beijiao Sag of Qiongdongnan Basin(QDNB).They occur at intervals and are rarely revealed by drilling wells in the deepwater *** of the mounds and channels are controversial and poorly *** on an integrated analysis of the seismic attribute,palaeotectonics and palaeogeography,and drilling well encountering a mound,research results show that these mounds are dominantly distributed on the depression centres and/or slopes of the Liwan and Beijiao sags and developed in a bathyal sedimentary *** the Liwan and Beijiao sags,the mounds between channels(sub)parallel to one another are 1.0–1.5 km and 1.5–2.0 km wide,150–300 m and 150–200 m high,and extend straightly from west to east for 5–15 km and 8–20 km,*** and channels in the Liwan Sag are parallel with the regional *** and channels in the Beijiao Sag,however,are at a small angle to the regional *** to internal geometry,texture and external morphology of mounds,the mounds in Beijiao Sag are divided into weak amplitude parallel reflections(mound type I),blank or chaotic reflections(mound type II),and internal mounded reflections(mound typeⅢ).The mounds in Liwan Sag,however,have the sole type,i.e.,mound type *** type I originates from the incision of bottom currents and/or gravity *** type II results from gravity-driven sediments such as *** typeⅢis a result of deposition and incision of bottom currents *** channels with high amplitude between mounds in the Beijiao and Liwan sags are a result of gravity-flow sediments and it is suggested they are filled by *** channels with low-mediate amplitudes are filled by bottom-current sediments only in the Beijiao Sag,where they are dominantly composed of *** study provides new insi

关键词： South China Sea middle Miocene channels and mounds contour currents

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