北黄海中、新生代盆地的原型性质     

李文勇王嘹亮  王后金黄家坚 《南海地质研究》2006,(1):60-70

根据最新调查资料并结合区域构造背景，通过盆地结构与控盆断裂、沉降曲线类型、沉积相特征、含油气系统、地壳结构类型、大地构造环境以及围区盆地类型等方面的综合分析，探讨了北黄海中、新生代盆地的原型性质。研究表明，北黄海盆地的原型在晚侏罗世一早白垩世以及古近纪均属于区域隆起背景之上发育的陆内断陷盆地，可分别称之为中生代陆内断陷盆地和古近纪陆内断陷盆地；新近纪则属于坳陷型盆地，可称之为新近纪坳陷型盆地。综合考虑控制中生代与古近纪沉积的断层的继承性和差异性、沉积相带和沉积中心的迁移性、沉积范围的比较接近特点、自成体系的含油气系统以及新近纪坳陷型沉积与前两者的垂向叠置关系等，将北黄海中、新生代盆地确定为叠合型盆地。  相似文献   

下扬子独立地块海相残留盆地油气勘探方向探讨   总被引：15，自引：6，他引：15       下载免费PDF全文

叶舟  梁兴  马力  张廷山  徐克定 《地质科学》2006,41(3):523-548

强烈的燕山期造山运动使下扬子独立地块海相原型盆地和前陆盆地被改造成冲断、剥蚀严重的燕山高原,晚燕山期—喜马拉雅期太平洋板块斜向俯冲形成张裂断陷盆地叠置,最终使其成为具有由前白垩系挤压冲断体系和上白垩统—新近系伸展断-坳陷体系组成双层结构的改造型残留叠合盆地。这既造成下扬子海相古生-中生界油气地质高复杂性,又造就了残存于晚期上白垩统—新近系断-坳陷盆地下伏的海相烃源岩“二次生烃”和晚期成藏优势。各个古近纪伸展断陷往往是独立的海相烃源含油气保存单元,古近-新近系区域盖层共同构筑的沉积重建型整体封闭保存体系和具晚期混源特色的海相有效烃源是海相含油气保存单元晚期成藏的基础,时空匹配的有效成藏组合是晚期成藏的必要条件。南黄海、苏北盆地是下扬子区沉积重建型整体封闭体系最好的构造单元,也是海相烃源晚期成藏的主要场所,印支和燕山运动不整合面上下、浦口组、泰州组和阜宁组一段是海相烃源古生中储或古生新储晚期成藏的主要层位,盐城、阜宁、海安、高邮、溱潼和黄桥—如皋断陷保存单位是首选勘探靶区。  相似文献   

The modeling of carbon isotope kinetics and its application to the evaluation of natural gas     

Xianqing LI  Xianming XIAO  Yongchun TANG  Hui TIAN  Qiang ZHOU  Yunfeng YANG  Peng DONG  Yan WANG  Zhihong SONG 《Frontiers of Earth Science》2008,2(1):96-104

The modeling of carbon isotope kinetics of natural gas is an issue driving pioneering research in the oil and gas geochemistry in China and internationally. Combined with the sedimentary burial history and basin geothermal history, the modeling of carbon isotope kinetics provides a new and effective means for the determination of the origin and accumulation history of natural gas pools. In this paper, we introduce themodeling of carbon isotope kinetics of natural gas formation and its applications to the assessment of natural gas maturity, the determination of the gas source, the history of gas accumulation, and the oil-gas ratio. It is shown that this approach is of great value for these applications. The carbon isotopic characteristics of natural gas are not only affected by the gas source and maturity of the source rock, but also are related to the accumulation condition and geothermal gradient in a basin. There are obvious differences in the characteristics of carbon isotope ratios between instantaneous gas and cumulative gas. Different basins have different kinetic models of carbon isotope fractionation, which depends on the gas source condition, the accumulation history and the sedimentary-tectonic history. Since the origin of natural gas in the superimposed basin in China is very complicated, and the natural gas pool is characterized by multiphase and variable gas-sources, this paper may provide a new perspective on the study and evaluation of natural gas.  相似文献   

Petroleum prospects of marine sequences in South China     

Liqiao MA  Yong DONG  Xiaolong TU  Fengxia SUN  Jiufeng XIA  Lanying YANG 《Frontiers of Earth Science》2008,2(1):105-113

The comprehensive study of the tectonics-sequence stratigraphic-petroleum system shows that five sets of major regional and some local source rocks were developed in the tectonic evolution of South China, including the Lower Cambrian and Lower Silurian in the Caledonian cycle, the Middle Permian and Upper Permian in the Hercynian cycle, and the Lower Triassic in the Indo-Sinian cycle. Due to the inhomogeneous maturity of source rocks in this area, gas exploration would mainly be carried out in the Lower Paleozoic areas, while oil and gas exploration would be in the Upper Paleozoic ones. The reformation from the Indo-Sinian cycle to the Himalayan cycle exerted decisive influence on the hydrocarbon accumulation in the Mesozoic-Cenozoic basin and marine sequences in southern China. The petroleum systems formed in the medium-late period of the superimposed basins are of the greatest potential. The distribution of primary and secondary oil-gas pools was mainly affected by favorable sedimentary facies, ancient uplift and slope. The comprehensive evaluation concluded that the focuses for petroleum exploration in the marine sequences of southern China will be in the superimposed basins along the margin of Yangtze landmass, the Subei-southern South Yellow Sea basin and the marine sequences preserved under the over-thrust nappe along the northern margin of the Jiangnan uplift. __________ Translated from Acta Petrolei Sinica, 2007, 28(3): 1–7 [译自:石油学报]  相似文献   

大陆层控构造与油气资源   总被引：2，自引：1，他引：1  

李扬鉴  崔永强  栾俊霞  戴想 《化工矿产地质》2008,30(2)

按大陆层控构造观点,控制油气资源的大陆构造主要有3种类型,即盆-山系、冲叠造山带和厚皮纵弯隆起带。油气资源与地幔流体息息相关。盆-山系油气的产生始于地幔流体作用下形成的玄武岩浆活动时期,集中于富含地幔流体的中地壳塑性层变厚、上拱的断隆山及其上覆盖层,如中国大陆东部中、新生代盆-山系。冲叠造山带前陆盆地油气,以有利于地幔流体上涌的仰冲型冲叠造山带较佳,如鄂尔多斯盆地中、西部;俯冲型冲叠造山带次之,如秦岭印支造山带南缘。厚皮纵弯隆起带核部巨大的潜在虚脱空间的强烈吸入作用,引起地幔流体大规模上涌,为其隆起带顶部和周边前陆盆地油气资源的形成,提供了丰富的物质和热能来源,如青藏高原和天山地区,所以这些地区油气资源较丰富。  相似文献   

中国西部复杂叠合盆地油气成藏研究进展与问题   总被引：14，自引：1，他引：13  

庞雄奇  罗晓容  姜振学  林畅松  张水昌  钟宁宁  李忠 《地球科学进展》2007,22(9):879-887

中国西部复杂叠合盆地富集了中国45%左右的剩余油气资源,目前探明率不到20%,发展潜力巨大。近20年来的基础理论研究表明,中国西部复杂叠合盆地具有“多期构造变革、多套生储盖组合、多旋回油气成藏、多次调整改造”的油气地质特征,大油气田的形成和分布受“古隆起迁移、烃源灶演化、区域盖层发育、构造平衡带叠合”四大要素的控制,在此基础上提出了“多元复合—过程叠加”的成藏模式和有利勘探区预测方法,为塔里木盆地的油气勘探进一步指明了方向。除四大要素外,复杂油气藏的形成和分布还受“圈闭发育分布”、“储层发育分布”、“优势通道形成演化”、“运聚动力条件”及其相互耦合关系的控制,在已有成果的基础上进一步开展“复杂油气藏形成演化机制与分布规律”的基础研究,对于进一步提高钻探成效和发展叠合盆地油气勘探理论具有重大的现实意义。   相似文献   

Survival Conditions of Folding in Different Depth During Orogenesis-Deformation in Texas Creek and Chester Dome,USA   总被引：1，自引：0，他引：1  

CAO Hui  XU Cuiping 《《地质学报》英文版》2014,88(1):103-112

A succession of 5 FIA trends（foliation intersection or inflection axes in porphyroblasts） preserved in high temperature-low pressure regime PreCambrian rocks in the Texas Creek, Arkansas River region reflected by the fold axial plane traces and schistosity data in this region. Similar fold axial plane trace data measured in Palaeozoic rocks in Chester Dome, Vermont, which is high temperature to medium pressure regime, only preserve the effects of the youngest FIAs of the all 5 FIA sets that obtained in this region. The other three FIA sets have no equivalent fold axial planes. This difference from shallow to deeper orogenic regimes reflects decreasing competency at greater pressure with collapse and unfolding of earlier formed folds. The greater overlying load of rocks has tended to flatten all but the very largest early-formed structures, preserving only those folds that were more recently developed.  相似文献   

重力高阶导数的正演研究     

陈永凌  蒋首进  谢丹 《四川地质学报》2014,(2):293-297

重力勘探作为一种位场勘探方法,由于体积效应或异常叠加效应,资料的解释往往精度差,也难以深度定位。因此,资料处理解释中的一个主要工作就是进行异常分离,以便突出异常的有用信息,区分不同异常源。高阶导数作为其中一种方法,能分离叠加异常,突出浅而小的地质体。  相似文献   

内蒙古西部银额盆地石炭系—二叠系油气地质条件与勘探发现   总被引：5，自引：1，他引：4       下载免费PDF全文

卢进才  张洪安  牛亚卓  刘护创  陈清棠  魏建设 《中国地质》2017,44(1):13-32

通过开展石炭纪—二叠纪盆地形成演化、沉积充填、烃源岩分布与地球化学特征、烃源岩热演化史,以及石炭系—二叠系沉积之后的构造沉积演化与油气保存条件的综合研究,提出了银额盆地为石炭纪—二叠纪与中生代叠合盆地的新认识,查明石炭系—二叠系为陆内裂谷盆地沉积产物,发育多套厚度大、有机质丰度中等—高、干酪根类型以Ⅱ型为主、演化程度中等—高的良好烃源岩,明确了其油气地质条件。优选的油气远景区经国土资源部竞争性出让,企业加大勘探投入,于务桃亥勘查区拐子湖凹陷首钻(拐参1井)获初期日产原油51.67 m3、天然气7290 m3的工业油气流,温图高勒苏木勘查区哈日凹陷首钻(延哈参1井)获日产天然气9.15万m3(无阻流量)的工业气流及少量凝析油,实现了1955年勘探以来油气的重大突破。通过对2口油气突破井产层时代的厘定,以及油气源的对比,明确了油气产层时代为二叠纪,指明了石炭系—二叠系良好的油气资源前景,应为区内油气勘探的主要目的层。  相似文献   

沉积叠加改造型矿床的物源及富集机制的地球化学研究   总被引：5，自引：2，他引：3  

马振东  李艳霞  单光祥 《矿床地质》1999,18(2):110-120

通过对长江中下游及邻区震旦系－早生古界内一些沉积叠加改造型锑－金矿床,银多金属矿床的物源及富集机制的地球化学研究认识到,在研究该类矿床的成矿作用时,不能仅仅局限在传统的认识和思维模式上,而是应该从更大的时,空域,用地球化学的思维去观察,去分析,它们的“源,运,储”,该类矿床成矿的有利因素,除了矿源层的物源基础外,其决定因素还在于后期叠加改造作用对成矿元素浓集能力的高低和效率强弱的控制。  相似文献