排序方式： 共有57条查询结果，搜索用时 296 毫秒
21.
Xiongqi Pang Chengzao Jia Junqing Chen Maowen Li Wenyang Wang Qinhong Hu Yingchun Guo Zhangxin Chen Junwen Peng Keyu Liu Keliu Wu 《地学前缘(英文版)》2021,12(2):695-711
The discovery and large-scale exploration of unconventional oil/gas resources since 1980s have been considered as the most important advancement in the history of petroleum geology;that has not only changed the balance of supply and demand in the global energy market,but also improved our understanding of the formation mechanisms and distribution characteristics of oil/gas reservoirs.However,what is the difference of conventional and unconventional resources and why they always related to each other in petroliferous basins is not clear.As the differences and correlations between unconventional and conventional resources are complex challenging issues and very critical for resources assessment and hydrocarbon exploration,this paper focused on studying the relationship of formations and distributions among different oil/gas reservoirs.Drilling results of 12,237 exploratory wells in 6 representative petroliferous basins of China and distribution characteristics for 52,926 oil/gas accumulations over the world were applied to clarify the formation conditions and genetic relations of different oil/gas reservoirs in a petroliferous basin,and then to establish a unified model to address the differences and correlations of conventional and unconventional reservoirs.In this model,conventional reservoirs formed in free hydrocarbon dynamic field with high porosity and permeability located above the boundary of hydrocarbon buoyancy-driven accumulation depth limit.Unconventional tight reservoirs formed in confined hydrocarbon dynamic field with low porosity and permeability located between hydrocarbon buoyancy-driven accumulation depth limit and hydrocarbon accumulation depth limit.Shale oil/gas reservoirs formed in the bound hydrocarbon dynamic field with low porosity and ultra-low permeability within the source rock layers.More than 75%of proved reserves around the world are discovered in the free hydrocarbon dynamic field,which is estimated to contain only 10%of originally generated hydrocarbons.Most of undiscovered resources distributed in the confined hydrocarbon dynamic field and the bound hydrocarbon dynamic field,which contains 90%of original generated hydrocarbons,implying a reasonable and promising area for future hydrocarbon explorations.The buried depths of hydrocarbon dynamic fields become shallow with the increase of heat flow,and the remaining oil/gas resources mainly exist in the deep area of“cold basin”with low geothermal gradient.Lithology changing in the hydrocarbon dynamic field causes local anomalies in the oil/gas dynamic mechanism,leading to the local formation of unconventional hydrocarbon reservoirs in the free hydrocarbon dynamic field or the occurrence of oil/gas enrichment sweet points with high porosity and permeability in the confined hydrocarbon dynamic field.The tectonic movements destroy the medium conditions and oil/gas components,which leads to the transformation of conventional oil/gas reservoirs formed in free hydrocarbon dynamic field to unconventional ones or unconventional ones formed in confined and bound hydrocarbon dynamic fields to conventional ones. 相似文献
22.
环青藏高原巨型盆山体系构造与塔里木盆地油气分布规律 总被引：6，自引：1，他引：5
贾承造 《大地构造与成矿学》2009,33(1)
中国中西部受控于喜山期青藏高原的隆升和向北、向东的推挤,在其外围形成一个巨型的盆山构造体系,环青藏高原巨型盆山体系主要由复活后的古造山带、前陆冲断带和小型克拉通盆地三个基本的构造单元组成,其中古生界小型克拉通与中新生界前陆冲断带是重要的含油气单元,它决定了中国中西部油气分布主要受古生界克拉通古隆起和中新生界前陆冲断带的控制。塔里木盆地在纵向上由发育齐全的下古生代碳酸盐岩、上古生代海相-海陆交互相碎屑岩沉积和中新生代陆相碎屑岩等构造层序叠置而成,在平面上以较稳定的小型克拉通为核心,边缘环绕库车、喀什、塔西南、塔东南等褶皱或冲断变形的前陆冲断带。塔里木盆地古生界小型克拉通盆地与中新生界前陆逆冲带叠合-复合的构造特征,以及演化的多阶段性,决定了这类盆地具有"多套烃源岩、多储盖组合、多含油气系统"的叠合-复合含油气系统的特点;油气分布受小型克拉通盆地中的古隆起控制,形成大面积岩性地层油气藏,前陆盆地中的冲断带构造控制形成背斜油气藏,具有多期成藏并存与晚期成藏为主的特点。 相似文献
23.
TANG Liangjie JIA Chengzao PI Xuejun CHEN Suping WANG Zhiyu XIE Huiwen . Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing China . Basin & Reservoir Research Center University of Petroleum Beijing China . PetroChina Company Limited Beijing China . Tarim Oilfield Company PetroChina Company Ltd. Kurle China . Department of Geology University of Petroleum Beijing China 《中国科学D辑(英文版)》2004,47(10):886-895
It is indicated that the salt beds have a bearingupon the hydrocarbon accumulation more than 80%discovered oil-gas reserves of the world[1]. The saltbeds can change the occurrence of overlying horizons,forming various structural traps[2,3]. The salt bed itselfis the most effective caprocks. The deposits ofhigh-saliniferous environment may have favorablepetroleum-generating conditions[4]. The salt beds withlow specific thermal conductivity may result in highergeothermal gradient of sub-salt str… 相似文献
24.
The Liangshan and Qixia formations in the Sichuan Basin of central China were formed in the earlier middle Permian. Based on outcrop observation of the Changjianggou section at Shangsi, Guangyuan region and 3rd-order sequence division in typical drillings, one-dimensional spectrum analysis has been used to choose the better curve between the natural gamma ray spectrometry log(ln(Th/K)) in Well-Long17 and the gamma ray log(GR) in Well-Wujia1, respectively, for identifying Milankovitch cycles in Sequence PSQ1 which comprises the Liangshan and Qixia formations, and then to identify the variation in the Milankovitch cycle sequences. On this basis, the system tract and 4th-order sequence interfaces in Sequence PSQ1 were found via two-dimensional spectral analysis and digital filtering. Finally, a high-frequency sequence division program was established. Among these cycles, long eccentricity (413.0 ka) and short eccentricity (123.0 ka) are the most unambiguous, and they are separately the major control factors in forming 4th-order (parasequence sets) and 5th-order (parasequences) sequences, with the average thicknesses corresponding to the main cycles being 11.47 m and 3.32 m in Well-Long17, and 14.21 m and 3.79 m in Well-Wujia1, respectively. In other words, the deposition rate in the beach subfacies is faster than that of the inner ramp facies. The ln(Th/K) curve is more sensitive than the GR as the index of relatively ancient water depth in carbonate deposition. One-dimensional spectrum analysis of ln(Th/K) curve could distinguish the Milankovitch cycle sequences that arose from the Precession cycle (20.90 ka), with a much higher credibility. Sequence PSQ1 in Well-Long17 contains 10 4th-order sequences, and the growth span of Sequence PSQ1 consisting of the Liangshan and Qixia formations is about 4.13 Ma. The single deposition thickness of the long eccentricity cycle sequence has the characteristics of thinning and then thickening in the two-dimensional spectrum, which could be used to identify the system tract interface of the 3rd-order sequence. The precession sequence thickness remains stationary. As a result, the early deposition rate in the mid-Permian of the Sichuan basin was very slow, remaining nearly stationary, and this reflects a sustained depositional environment. Whole-rock carbon and oxygen isotope curves could also prove this point. Milankovitch cycle sequence studies provide a basis for paleoenvironmental analysis and, as such, can be used to analyze ancient climate change, calculate deposition rate and deposition time, and carry out fine isochronous stratigraphic correlation. 相似文献
25.
笔者等以柴达木盆地柴西地区构造特征为基础,首先分析了柴达木盆地区域构造背景,认为柴达木盆地新生代属于巨型的环青藏高原盆山体系,阿尔金山前前陆冲断带就形成于盆山结合部,阿尔金山前冲断活动主要受控于喜马拉雅运动期印度板块与青藏高原的活动,其次根据走滑断裂规模和走滑断裂对整个盆地沉积的控制作用,将柴西地区的各种复杂走滑断裂分为盆地级(一级)、区带级(二级)、圈闭级(三级)、显微级走滑断裂;柴西地区各种复杂多样的走滑断裂与之伴生的构造组合都与其所经历的构造运动和构造演化有关;在构造演化的基础上分析了柴西各走滑断裂的形成期与改造期,最后研究了走滑断裂在油气成藏过程中起着重要地作用,控制了油气聚集和分布,在勘探实践中取得了很好的效果. 相似文献
26.
Geologic Characteristics of Volcanic Hydrocarbon Reservoirs and Exploration Directions in China 总被引：4，自引：0，他引：4
ZOU Caineng ZHU Rukai ZHAO Wenzhi JIA Chengzao ZHANG Guangy YUAN Xuanjun ZHAO Xia WEN Baihong 《《地质学报》英文版》2010,84(1):194-205
Abstract: Volcanic rocks are distributed widely in China, which are important exploration targets. By analyzing many discovered volcanic hydrocarbon reservoirs all over the world, the authors summarized the geologic characteristics of the formation of volcanic hydrocarbon reservoirs in China, and gave further exploration directions and advices. (1) There are mainly Carboniferous-Permian, Jurassic-Cretaceous, Paleogene-Neogene volcanic rocks in oil- and gas-bearing basins in China, which are mainly distributed in the Junggar Basin, Songliao Basin, Bohai Bay Basin, etc. There are mainly intermediate rocks and acidic rocks in east China, and intermediate rocks and basic rocks in west China. They primarily develop in intracontinental rift settings and island arc environments. (2) Pore-fissure reservoirs are distributed widely in basins, which are volcanic rocks mainly in explosive and effusive facies. (3) Volcanic hydrocarbon reservoirs are chiefly near-source lithostratigraphic hydrocarbon reservoirs, and the oil and gas accumulation is predominantly controlled by lithotypes, faults and structural positions. (4) Deep-seated oil and gas reservoirs in the Songliao Basin and Carboniferous volcanic hydrocarbon reservoirs in the Junggar Basin are potential giant volcanic gas provinces, the volcanic hydrocarbon reservoirs in the Bohai Bay Basin and Santanghu Basin are favorable for oil and gas reserves increase, and volcanic rocks in the Turpan Basin, Sichuan Basin, Tarim Basin have exploration potentiality. (5) The technology series of oil and gas exploration in volcanic rocks have been preliminarily formed. 相似文献
27.
超深层是指现今或曾经埋藏深度超过6000 m的沉积地层。中国海相超深层时代老,热演化程度高,经历的构造运动多,独特的构造-沉积和生烃环境,决定了海相超深层油气藏形成与分布的复杂性,成烃-成储-成藏规律明显不同于中浅地层,勘探的难度也远远大于国外中新生代克拉通盆地。经过半个多世纪的探索,近年来中国海相超深层油气勘探在中西部盆地取得一系列重大突破,显著提升了超深层领域油气资源的战略地位。与此同时,中国海相超深层油气地质理论也取得重大进展,形成了以重大地质转折期构造活动控制超深层油气地质要素发育、深埋高温环境导致多途径天然气生成、沉积-构造作用控制超深层油气储集空间形成与保持、超深层温压系统控制油气藏相态演化和多期成藏、多层系分布等为核心的理论认识,极大地发展了国外学者基于中新生代海相地层提出的油气生成与成藏模式,拓展了海相油气资源形成和分布的时空界限。 相似文献
28.
塔里木盆地、柴达木盆地和四川盆地是环青藏高原盆山体系中最为重要的三大盆地,其新生代构造地貌演化引起了研究者的广泛关注。通过对这三大盆地的地貌形态、基底性质、流域属性等特征的对比研究,认为在相似的构造环境下,环青藏高原盆山体系大规模的成山与成盆具有一定的规律:塑性块体显著缩短增厚成山;刚性块体缩短量较小,地壳增厚不明显,因而呈现较为平坦的盆地。刚性地块的形状决定了环青藏高原大型盆地的形状,而相似的构造环境与基底性质使得盆地内部具有相似的构造地貌特征。值得注意的是,这些盆地主体部分垂向上新生代沉积的填充序列主要受控于盆地的流域属性与水动力条件,而受盆地水平应力状态所带来的影响相对较小。同时,盆地内的新生代沉积厚度与流域属性对盆地及其周缘地区的侵蚀基准面、海拔高度、边界断裂的发育都产生了显著的影响,提供了一个深、浅圈层之间相互作用的经典案例。 相似文献
29.
Poly-phase salt tectonics and hydrocarbon accumulation in Tarim superimposed basin, northwest China 总被引：2，自引：0，他引：2
The purpose of this paper is to discuss the poly-phase salt tectonics and its relation to the hydrocarbon accumulation of the Tarim superimposed basin. Several salt sequences are developed in the Tarim basin, they are: (1) the Mid-Early Cambrian salt sequence, mainly distributed in the west part of the north Tarim uplift and Keping uplift; (2) the Early Carboniferous salt sequence, mainly distributed in the south slope of the north Tarim uplift; (3) the Paleogene salt sequence, mainly distributed in the mid-west part of the Kuqa foreland fold belt and north Tarim uplift; and (4) the Miocene salt sequence, mainly distributed in the east part of the Kuqa foreland fold belt. The salt sequences deposited in the tectonically calm scenario, while the salt layers deformed during the period of intense tectonism. Although the salt sequences are characteristic of plastic flow, the differences of salt deformation styles exist in the different salt sequences because of the different deformation mechanism. It is attractive that the distribution of the large oil-gas fields or pools has a bearing upon the salt sequences and salt structures, such as the Tahe oilfield related to the Lower Carboniferous salt sequence and laterally facies changed mudstone, the Kela No.2 gas field to the Paleogene salt structures, and the Dina gas field to the Miocene salt structures. It is indicated that the large-scale hydrocarbon accumulation is controlled by the poly-phase salt sequences and structures. The deep analysis of the poly-phase salt tectonics is helpful to understanding the characteristics of the structural deformation and oil-gas accumulation of the Tarim basin. 相似文献
30.
塔里木盆地北部库车前陆褶皱-冲断带构造-地层层序可划分为中生界盐下层序、古新统一始新统盐层层序和渐新统一第四系盐上层序。盐岩层序的岩性主要为灰白色、浅灰色盐岩、膏岩、泥灰岩和紫红色碎屑岩,厚110～3000 m。盐岩层的存在使库车前陆褶皱-冲断带发育-系列盐相关构造,其中最引人注目的是盐推覆构造。野外地质调查、地震资料解释、遥感资料和钻井资料揭示,沿库车前陆褶皱-冲断带前缘西秋立塔克山发育大型盐推覆构造,总体呈近东西走向,并略呈往西南凸出的弧形展布,沿走向延伸超过200km,由北往南逆冲推覆距离达30km以上。主断层沿古新统-始新统盐岩层发育,外来推覆体由古新统-始新统盐层层序和渐新统-第四系盐上层序组成,表现为受断层控制的单面山,逆冲推覆在原地中生代-新生代地层之上。地质分析和剖面复原结果表明,盐推覆构造主要形成于新近纪末期以来的喜马拉雅晚期阶段,现今仍具有强烈的活动性。由于不均匀推覆作用,在盐推覆构造的不同地段,逆冲推覆距离、冲断层产状、外来岩系和原地岩系的叠置关系以及盐相关构造的发育都有较大差异,显示出走向上分段性特点。库车前陆褶皱-冲断带前缘盐推覆构造的形成演化受区域挤压作用、重力滑动和重力扩展作用控制。 相似文献