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综合运用高精度层序地层学、构造一地层学方法，认为十屋断陷深层发育的各类隐蔽圈闭是下一步勘探工作的重要目标。同时，由于构造对沉积的控制作用，在断陷内部不同的构造部位具有不同的隐蔽圈闭分布特征。十屋断陷西部皮家地区、北部张家屯一八屋地区位于油气主要运移指向区，分别由断裂坡折带和以挠曲型褶皱为特征的弯折带控制的储集砂体十分发育，盖层及保存条件也十分优越，是深部原生岩性、地层油气藏最有利的勘探目标区带。 相似文献
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在小宽断裂带构造解析基础之上,根据地质资料以及前人提供的岩石物理学参数建立了梨树断陷区的二维地质和数值模型。进行了构造应力场数值模拟,分析了梨树断陷小宽断裂带断陷期小宽断裂带断陷期在沙河子期(K_1sh)、营城期(K_1yc)、登楼库期(K_1d)的构造应力场特征。模拟结果显示:(1)沙河子期在左旋走滑应力状态下,小宽断裂带处于近NE—SW方向的拉张应力状态,剪应力在沿着断裂带SW—NE走向逐渐减小;(2)营城期在右旋走滑的应力状态下,小宽断裂带处于近NW—SE向的拉张力状态,剪应力最大值位于断裂带的最中间部位;(3)登楼库期在左旋走滑的应力状态下,断裂带处于SWW—NEE向的张拉应力状态,剪应力最大值位于断裂带西南段。 相似文献
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辽河滩海葵花岛构造带断裂发育特征及其与油气关系 总被引：1，自引：0，他引：1
辽河滩海葵花岛构造带发育复杂断裂体系，断裂发展主要经历了沙河街组三段沉积期－东营组二段下部沉积早期，东营组二段下部沉积晚－东营组一段沉积期，Ｎ－Ｑ等三个期次，本文根据规模，控制作用和与油气关系将断裂分为基底主干断裂，盖层主要断裂，盖层次要断裂，小断裂四个序次，断裂与油气关系密切，断裂活动控制了生储盖层之发育，在构造和圈闭形成中起主导作用，影响油气运聚与保存，最后，文章讨论了之各种圈闭之油敢勘探前景 相似文献
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在已了解的松辽盆地登娄库—永安地区构造和沉积演化特点的基础上,利用现有钻井的岩心资料、测井资料和地震资料,对该地区的成藏模式特征从运移方式和生储盖空间组合两个方面上进行了研究和分类,分析了各自形成的主控因素.研究表明,该区域地层具有断坳双层结构,按油气运移类型划分,在断陷期主要发育两种油气成藏模式,分别为原生油气成藏模式和次生油气成藏模式;在坳陷期主要发育次生油气成藏模式和混生油气藏.从储层与烃源岩的空间组合上来看,区域内主要发育有上生下储、下生上储和自生自储这三种油气成藏模式.形成这些不同成藏模式的主要因素是该区深至基底的大型断裂构造和继承性断裂、反转构造以及固有沉积环境等. 相似文献
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构造坡折带是由同沉积构造长期活动引起的沉积斜坡明显突变的地带，对盆地充填的可容纳空间和沉积作用可产生重要的影响，构造坡折带和油气资源分布有着较为密切的关系。隐蔽圈闭是沉积盆地油气勘探中后期重点勘探领域。构造坡折带是沉积盆地中隐蔽圈闭最发育的部位之一，多级构造坡折带组合对盆地隐蔽圈闭的发育有一定的影响，多级构造坡折带隐蔽圈闭发育更受到沉积环境和湖平面变化的影响；构造坡折带地区隐蔽圈闭油气成藏良好，高位域和三角洲前缘泥岩是良好的烃源岩，连片砂体和不整合界面及生长断裂是良好的输导条件，生长断裂和高位域泥岩具有良好的封盖作用。 相似文献
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陆丰凹陷是位于珠江口盆地珠Ⅰ坳陷内的富烃凹陷，凹陷南部地区古近系具有良好勘探潜力。以三维地震资料解释成果和钻井资料为基础，分析陆丰凹陷南部地区断裂发育特征及演化过程，明确断裂对油气运聚成藏的控制作用，划分油气成藏组合类型。陆丰凹陷南部发育3个半地堑结构的洼陷，分别受活动性较强的3条铲式边界断裂控制。断裂主要发育于古近纪，斜坡带部位发育密度大，平面优势走向由深层NEE向至浅层近S-N向偏转，断裂密集带自东向西迁移。断裂可分为三级，分别控制洼陷结构、局部构造带和构造圈闭的形成。依据活动期次可划分出文昌期活动断层、恩平期活动断层和文昌-恩平期活动断层。陆丰凹陷南部地区断裂控制着断鼻、断块及断背斜圈闭的形成，断裂与烃源岩的组合类型差异影响着油气运聚效率。综合油气富集层系、输导方式、断裂活动性及源-断组合类型等成藏要素，建立源内自生自储型、源内自生上储型、源外旁生侧储型和源外下生上储型等4类油气成藏组合类型，对下一步油气勘探实践具有理论指导意义。 相似文献
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松辽盆地南部长岭断陷为古生界变质基底上发育的箕状断陷,沙河子组发育厚度较大的深湖相黒色泥岩,有机质丰度高,热演化程度高,生烃强度大,具备很好的天然气资源基础.断陷期发育2套火山岩,其中营城组爆发相、溢流相火山岩大面积分布,岩性以酸性流纹岩、凝灰岩、火山角砾岩等为主,孔洞发育,储集物性较好.长岭断陷东部发育2个大型古隆起,断裂发育,天然气运聚条件较好,目前已发现3个气藏3个含气构造,是寻找大型天然气藏的最有利地区. 相似文献
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X.M. Xiao N.X. Li H.J. Gan Y.B. Jin H. Tian B.J. Huang Y.C. Tang 《Marine and Petroleum Geology》2009,26(8):1365-1378
The identification of a deeply-buried petroleum-source rock, owing to the difficulty in sample collection, has become a difficult task for establishing its relationship with discovered petroleum pools and evaluating its exploration potential in a petroleum-bearing basin. This paper proposes an approach to trace a deeply-buried source rock. The essential points include: determination of the petroleum-charging time of a reservoir, reconstruction of the petroleum generation history of its possible source rocks, establishment of the spatial connection between the source rocks and the reservoir over its geological history, identification of its effective source rock and the petroleum system from source to trap, and evaluation of petroleum potential from the deeply-buried source rock. A case study of the W9-2 petroleum pool in the Wenchang A sag of the Pearl River Mouth Basin, South China Sea was conducted using this approach. The W9-2 reservoir produces condensate oil and gas, sourced from deeply-buried source rocks. The reservoir consists of a few sets of sandstone in the Zhuhai Formation, and the possible source rocks include an early Oligocene Enping Formation mudstone and a late Eocene Wenchang Formation mudstone, with a current burial depth from 5000 to 9000 m. The fluid inclusion data from the reservoir rock indicate the oil and the gas charged the reservoir about 18–3.5 Ma and after 4.5 Ma, respectively. The kinetic modeling results show that the main stages of oil generation of the Wenchang mudstone and the Enping mudstone occurred during 28–20 Ma and 20–12 Ma, respectively, and that the δ13C1 value of the gas generated from the Enping mudstone has a better match with that of the reservoir gas than the gas from the Wenchang mudstone. Results from a 2D basin modeling further indicate that the petroleum from the Enping mudstone migrated upward along the well-developed syn-sedimentary faults in the central area of the sag into the reservoir, but that the petroleum from the Wenchang mudstone migrated laterally first toward the marginal faults of the sag and then migrated upward along the faults into shallow strata. The present results suggest that the trap structure in the central area of the sag is a favorable place for the accumulation of the Enping mudstone-derived petroleum, and that the Wenchang mudstone-derived petroleum would have a contribution to the structures along the deep faults as well as in the uplifted area around the sag. 相似文献
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在深入调研南海深水盆地油气地质条件的基础上,系统分析了油气分布规律和成藏主控因素,明确了油气资源潜力和有利勘探方向,旨在为南海深水油气勘探决策提供科学依据。研究结果表明:南海深水盆地发育在非典型边缘海大陆边缘,其石油地质条件具有特殊性,油气分布特征存在显著的南北差异。其中,南海北部深水的珠江口盆地和琼东南盆地,以构造圈闭型油气藏为主;南海中南部深水的曾母盆地南部和文莱-沙巴盆地,主要为构造圈闭型油气藏,曾母盆地北部以岩性油气藏(生物礁滩型油气藏)为主,万安盆地主要为构造圈闭型和基岩潜山型油气藏。南海北部深水盆地和中南部深水盆地的烃源岩、储盖和圈闭等油气地质特征表明,南海深水盆地具有巨大的油气勘探潜力。南海深水的有利勘探方向为:①琼东南盆地乐东-陵水凹陷的中央峡谷、陵南斜坡带,松南-宝岛凹陷的反转构造带,宝岛凹陷北坡海底扇,长昌凹陷的环A洼圈闭带(海底扇);珠江口盆地白云凹陷的主洼深水扇、主洼两翼、西南断阶带,荔湾凹陷的深水扇。②南海中南部深水盆地的文莱-沙巴、曾母和万安盆地。 相似文献
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琼东南盆地深水区L18气田上新统地层圈闭气田形成条件及成藏模式 总被引：2，自引：1，他引：1
近期在琼东南盆地超深水区发现了L18气田上新统地层圈闭气田，但在聚气背景、烃源岩、储层沉积成因及天然气输导体系等气田形成条件和成藏模式认识存在争议。通过对该气田形成条件的综合分析，认为上新世轴向古洼槽内地层圈闭、陵水凹陷东洼下渐新统崖城组浅海相烃源岩、上新统限制型重力流砂岩储层和渐新统-中新统断裂垂向沟源通道是形成上新统地层圈闭气田的4个基本条件。中中新世以来盆地中央继承性发育轴向古洼槽和限制型重力流沉积，随着后期地层沉积迁移、差异压实作用，上新统莺歌海组砂岩顶面在轴向洼槽内起伏，并被周边泥岩封盖、封堵，形成了地层圈闭；约3.4 Ma BP，陵水凹陷东洼下渐新统崖城组浅海相烃源岩生成了成熟天然气，沿渐新统-中新统断裂向上运移到上新统莺歌海组重力流沉积砂岩中，再侧向运移至地层圈闭中聚集成藏，具有"烃源岩、圈闭、断裂+砂岩输导层"三要素控藏的上新统地层圈闭成藏模式。 相似文献
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为了揭示高邮凹陷南断阶许庄—竹墩地区复杂断裂系统的成因、演化与油气成藏的关系,通过对不整合面地层剥蚀量计算、构造演化剖面分析等方法,系统地总结了许庄—竹墩地区断层的发育演化规律。吴堡运动和三垛运动时期是断裂活动最强烈的时期,许庄—竹墩地区的地层受到较强的剥蚀作用。本区主要断层的发育顺序依次为真①断层、纪③断层、真②’断层和真③断层,同一断层在不同的地质时期和平面上的不同位置,发育强度有明显的差异性。断层的活动一方面形成了一系列的断块圈闭,另一方面是油气垂向运移的主要通道,因此在本区形成了一系列的断块圈闭油藏。 相似文献
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The Niudong Buried Hill Field, which lies in the Baxian Depression of the Bohai Bay Basin, is the deepest oil/gas accumulation in eastern China. Its Precambrian dolomite reservoir occurs at burial depths of 5860 m–6027 m. This paper attempts to document the hydrocarbon charging and accumulation history in this field, which could greatly enhance the understanding of the mechanisms for the formation of deep hydrocarbon accumulations. Our previous study of oil trapped in fluid inclusions has demonstrated that the ratio parameters of the fluorescence spectral intensities at 425 nm and 433 nm (Q425/433 ratio), and at 419 nm and 429 nm (Q419/429 ratio) can be more effective for revealing hydrocarbon charging history than the previously-used fluorescence parameters such as Lambda max and red/green quotient as well as fluorescence colors. The hydrocarbon charging and accumulation history in the Niudong Buried Hill Field was studied with an integrated approach involving the application of these two spectral parameters of petroleum inclusion fluorescence as well as utilization of other data including homogenization temperatures of aqueous inclusions coeval with petroleum inclusions, and cross-cutting relationships of cements and “oil veins” in pores and fractures. The results indicate that the dolomite reservoir in the Niudong Buried Hill Field experienced three episodes of hydrocarbon charging. In the first two episodes (between 38.5Ma and 25Ma), the low mature and mature oils, which were derived from source rocks in the Sha-4 Member of the Eocene Shahejie Formation, migrated into the reservoir, but part of them leaked out due to normal faulting at the updip margin of the buried hill. These early-charged oils were preserved mainly in small pores in micritic dolomites by oil-wettability and capillary pressure. In the Neogene, the basin subsided as a whole and local faults at the updip margin became inactive and played a sealing role. By approximately 13Ma, the source rocks became highly mature and the generated hydrocarbons then migrated into the reservoir and accumulated. Therefore, the last charging is the most important for hydrocarbon accumulation in the Niudong Buried Hill Field. 相似文献
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文中利用稀土元素在原油运移中良好的续承性,初步探讨了在济阳坳陷内的东营凹陷和沾化凹陷原油中稀土元素的赋存特征以及它们的来源方式,并指出两凹陷不同的物源性质是造成原油稀土赋存特征差异的主要原因。 相似文献
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下扬子地区海相上组合（主要为中生界、上古生界）经历了印支运动、燕山运动、喜马拉雅运动的叠加改造,生、储、盖油气成藏诸要素被改造调整,海相中、古生界油气成藏条件复杂。基于海相上油气组合的成藏演化过程与时空匹配的分析,可以认为上油气成藏组合具有良好的生、储、盖配置关系;三次油气的关键充注期后,基本没有经历大的油气破坏和改造作用;成藏要素在时空上有效配置,将是下扬子地区最有油气勘探前景的海相油气成藏组合。沿江地区,处于南北对冲前缘带,是海相地层的弱变形区,地层保存相对完整,成藏配置较好,发育“古生新储”、“古生古储”的油气藏,为下扬子地区最有利的勘探区域。 相似文献