通王断裂带沙河街组油气成藏主控因素研究   总被引：1，自引：0，他引：1  

王利 《海洋地质译丛》2010,(1):14-20

通王断裂带地区位于济阳坳陷东营凹陷南斜坡东部，沙河街组是本区的主要含油层系。通过烃源岩分析、储集层类型划分、孔隙流体动力场的描述、优质输导体系类型及断裂构造特征的研究，认为牛庄洼陷烃源岩主要为沙四上和沙三段深湖相一半深湖相暗色泥岩、油页岩，油气以生油洼陷为中心，呈环状或半环状分布；沙三段大型三角洲相储集砂体、沙四段中上部的滨浅湖近岸砂坝、远岸砂坝和席状砂岩储层是主要储集层类型；砂体一断层类输导体系是本区优质输导体系，牛庄洼陷北部发育的高压型复式温压系统，使油气顺着断层、砂体向南部通王断裂带常压常温和常压高温区运移。通王断裂带的油气藏主要是受断裂控制的构造油气藏，王家岗油田往西的中浅层是断层类油藏的有利地区，王家岗地区北部和陈官庄地区的西北部，是沙三段隐蔽油气藏以及断层-岩性复合型油气藏勘探的有利勘探地区。  相似文献   

Origin,distribution, and alteration of asphalts at Chapopote Knoll,Southern Gulf of Mexico     

Markus Brüning  Heiko Sahling  Ian R. MacDonald  Feng Ding  Gerhard Bohrmann 《Marine and Petroleum Geology》2010

Following the discovery of asphalt volcanism in the Campeche Knolls a research cruise was carried out in 2006 to unravel the nature of the asphalt deposits at Chapopote. The novel results support the concept that the asphalt deposits at the seafloor in 3000 m of water depth originate from the seepage of heavy petroleum with a density slightly greater than water. The released petroleum forms characteristic flow structures at the seafloor with surfaces that are ‘ropy’ or ‘rough’ similar to magmatic lava flows. The surface structures indicate that the viscosity of the heavy petroleum rapidly increases after extrusion due to loss of volatiles. Consequently, the heavy petroleum forms the observed asphalt deposit and solidifies. Detailed survey with a remotely operated vehicle revealed that the asphalts are subject to sequential alterations: e.g. volume reduction leading to the formation of visible cracks in the asphalt surface, followed by fragmentation of the entire deposit. While relatively fresh asphalt samples were gooey and sticky, older, fragmented pieces were found to be brittle without residual stickiness. Furthermore, there is evidence for petroleum seepage from below the asphalt deposits, leading to local up-doming and, sometimes, to whip-shaped extrusions. Extensive mapping by TV-guided tools of Chapopote Asphalt Volcano indicates that the main asphalt deposits occur at the south-western rim that borders a central, crater-like depression. The most recent asphalt deposit at Chapopote is the main asphalt field covering an area of ∼2000 m². Asphalt volcanism is distinct from oil and gas seepage previously described in the Gulf of Mexico and elsewhere because it is characterized by episodic intrusions of semi-solid hydrocarbons that spread laterally over a substantial area and produce structures with significant vertical relief. As Chapopote occurs at the crest of a salt structure it is inferred that asphalt volcanism is a secondary result of salt tectonism.  相似文献   

东沙海区泥火山调查进展*     

阎贫  王彦林  于俊辉  罗伟  刘兴健  靳永斌  李鹏春  刘杰  钟广见  易海 《热带海洋学报》2021,40(3):34-43

泥火山是地球运动和深部含流体物质向表层迁移的一种重要形式, 其喷溢及喷出物对认识地质动力、地层岩性和资源环境具有重要的意义。东沙海区新生界薄(~1km), 中生界厚(>5km), 是南海最典型的中生代沉积区和油气勘探待突破区。区内有众多的海山海丘, 过去都被推测为不利于油气成藏的岩浆火山。但近年来针对这些海山进行的调查发现了大量海底地层底辟形变与断裂、流体充注空白反射带和喷溢释放结构。通过浅表层取样采获了丰富的自生碳酸盐岩结核及深水珊瑚、海绵等生物, 表明众多海山、海丘具有明显的泥火山活动特征。东沙泥火山的发现表明区内具有良好的油气生成和运移条件, 为勘探源于中生界的油气和水合物提供了重要线索; 而大量深水珊瑚和海绵的出现指示东沙泥火山区可能是深水珊瑚礁、海绵礁发育区, 为研究油气泄漏、化养生物和环境三者的关系提供了重要的研究对象。  相似文献   

板桥凹陷沙三段油气生成、运移和聚集数值模拟     

郭小文  何生  侯宇光 《地球科学》2010,35(1)

板桥凹陷主要烃源岩为沙三段地层暗色泥岩,而沙三段砂岩为板桥凹陷主要储层之一.在恢复板桥凹陷埋藏史、热史和成熟史的基础上,定量模拟沙三段油气生成、运移和聚集特征,模拟结果利用实测镜质体反射率(Ro)、地层温度和63口井钻探结果验证.模拟结果表明:(1)板桥凹陷现今的热流值在59.8～61.7mW/m2之间,古热流演化经历了早期(65～50.4Ma)持续升高和晚期(50.4～0Ma)逐渐降低两个阶段,在距今50.4Ma达到最高;(2)东营组沉积末期,板桥凹陷沙三段烃源岩成熟度(Ro)大约在0.5%～1.25%之间,现今成熟度(Ro)范围大约在0.5%～1.8%之间,在距今大约35Ma开始生烃,距今30Ma开始达到生烃高峰;(3)沙三段烃源岩在距今大约31Ma开始排烃,距今31～26Ma为主要排烃阶段,距今26～0Ma为少量排烃阶段;(4)板桥凹陷油气主要运移路径主要受控于古构造面,凹陷区以发散流为主,北部陡坡带以平行流为主,汇聚流主要存在板桥凹陷南部缓坡带.在板桥凹陷沙三段存在6个有利油气聚集区,其中以聚集区Ⅰ和Ⅱ最有利,主要是因为近源、油气运移动力强和运移距离短.  相似文献   

Dynamic Systems of Petroleum Accumulation in the Nanpu Depression,Bohai Bay Basin,China   总被引：1，自引：0，他引：1  

LIU Guangdi  SUN Mingliang  ZHANG Zhihuan  DONG Yuexia 《《地质学报》英文版》2010,84(5):1273-1285

<正>It is significant to distinguish the dynamic systems of petroleum accumulation(DSPA) for the understanding of petroleum accumulation and distribution.According to the formation pressure framework,genetic types of petroleum and characteristics of conduit systems,three dynamic systems of petroleum accumulation were identified in the vertical profile in the Nanpu depression,Bohai Bay basin.The deeper DSPA(including formations Es_3 to Es_2) is a sealed system with high-overpressure and high-mature self-sourced oil.Most of the crude oil in the system accumulated in the periods of late Oligocene(23.5 Ma) and late Pliocene(2.4 Ma).The middle DSPA(including formations Es_1 to Ed_1) is an overpressured half-sealed system with mature or lower-mature self-sourced oil.The accumulation of oil in the system also occurred in the late Oligocene(23.5 Ma) and late Pliocene(2.4 Ma).The shallower DSPA(including formations Ed_2 to Q) is a hydrostatic system with lower-mature aliensourced oil from the middle system.Oil within this system accumulated only in the late Pliocene period.The oil in the shallower system migrated vertically along the faults from the formerly accumulated oil in the middle system by lateral migration along the sandbodies,whereas petroleum accumulation in the deeper system was mainly derived from the system itself by lateral migration along the sandbodies and rarely migrated out of the system.In this case,it seems that the deeper system is a more potential exploration prospect in addition to the other two proved favorable systems.  相似文献   

Complex Petroleum Migration and Accumulation in Central Region of Southern Junggar Basin,Northwest China     

曹剑  王绪龙  魏东涛  孙平安  胡文瑄  贾东  赵应成 《中国地质大学学报(英文版)》2010,(1)

The central region of the southern Junggar basin (Northwest China) is a key exploration target in this petroliferous basin. As there are four sets of potential source rocks (e.g., Permian, Jurassic, Cretaceous and Paleogene sequences), petroleum migration and accumulation are likely complex. This study represents an attempt to understand this complexity in order to provide fundamental information for future regional petroleum exploration and geological studies. Based on petroleum geology and geochemistry, i...  相似文献   

鄂尔多斯盆地晚三叠世延长组湖盆演化及石油聚集规律   总被引：3，自引：0，他引：3  

国吉安  庞军刚  王桂成  李文厚  陈全红  曹红霞 《世界地质》2010,29(2):277-291

延长组湖岸线、深湖线及湖盆底形恢复显示,延长组湖盆具有向西南部迁移,再向东北部迁移的演化特点。长6期湖盆底形具有"南陡北缓、西陡东缓"的特点,盆地中心位于庙湾以北、正宁以东、甘泉以南地带,造成盆地东北部为缓坡型三角洲体系,而西南部为陡坡型辫状河三角洲,前缘末端发育浊积扇。延长组划分为5个三级层序,控制了4套生储盖的分布。延长组湖盆演化与石油的聚集关系密切,湖岸线附近的三角洲前缘是油气的主要富集区,深湖区的浊积砂体也具有一定的储集性能和良好的成藏条件。东北部、西南部主要成藏组合及深湖浊积岩的特征表明,可以进一步向盆地腹地扩大勘探。  相似文献   

裂谷盆地深层石油地质特征与油气成藏条件          下载免费PDF全文

于开财  李胜利  于兴河  郑秀娟 《地学前缘》2010,17(5):289

裂谷盆地是指沉积盆地在地质历史演变的某个阶段经历了裂谷时期的盆地。裂谷盆地深层在中国一般是指裂谷盆地中含油气层段埋深>3 500 m的地层,国外则指埋深>4 000 m的地层。中国东部具深层油气田的裂谷盆地主要是中、新生代盆地;全球裂谷盆地深层的大油气藏主要分布于白垩系,其次是上古生界;深层油气藏的储层形式多样,有孔隙型、裂缝型、溶洞-裂缝型及孔隙-裂缝型等;深层油气田的油气运移方向以垂向为主,圈闭则大多以岩性或与断裂有关的构造岩性圈闭为主。其次,盐岩体的活动对圈闭的形成亦十分重要,其类型则以复合型为主。  相似文献   

准噶尔盆地陆西地区油气运聚类型研究          下载免费PDF全文

王绪龙  曹剑  石新朴  向宝力  蓝文芳  孙平安 《地学前缘》2010,17(5):315

油气运聚解析是石油地质学研究的基础命题,而复杂油气运聚解析则是研究难点和热点。以准噶尔盆地腹部陆西地区为例,提出了解析复杂油气运聚的一种新方法,即油气运聚类型研究。这种方法提出了新的研究思路。主要有两方面作用:一是在勘探发现油气显示后,通过分析油气运聚类型,进而评价成藏潜力,为试油提供依据;二是在试油之后,对成功和失利的井分别分析原因,解析二者在油气运聚类型和过程上的差异,从而为油气勘探部署和评价提供参考。以陆西地区为例的应用效果良好,尽管诸多参考标准并不一定完全适用于其他地区,但研究思路、方法可供借鉴。  相似文献   

挤压断裂构造样式地震解释   总被引：1，自引：0，他引：1  

吴红华  戴福贵  杨津  杨克绳 《地学前缘》2010,17(5):361

挤压构造的动力学为板块与板块碰撞形成造山带,在造山带一侧或造山带内部形成挤压型盆地,这些盆地在挤压应力作用下,形成叠瓦逆冲、复合逆冲、多层次滑脱逆冲、多产状逆冲断裂构造组合。文中对与挤压逆冲有关的褶皱构造样式——断弯、断展、断滑褶皱构造进行了描述,指出在加强非背斜构造样式勘探的同时,也应加强背斜构造样式的勘探。油气资料显示80%～90%的油气生产来自背斜构造样式的油气田,面积大、幅度高的挤压构造是形成大、中型油气藏的地质条件。  相似文献