THE OIL-GAS CHARACTERISTICS OF THE FORELAND BASIN IN THE SOUTHEASTERN MARGIN OF THE DABIE MOUNTAINS
-
摘要: 大别山东南缘前陆盆地经历了由海相—海陆过渡相—陆相的演化历程,具有复合叠合盆地特征。从盆地层序上看,早中生代陆相前陆沉积体系下伏晚古生代海相被动陆缘沉积体系;从烃源岩系和含油气系统特征上看,具有陆相和海相两大套烃源岩系和成油气体系。其中,前陆盆地下伏海相被动陆缘烃源岩的优劣和保存条件是能否形成油气藏的关键。研究证明,晚古生代海相被动陆缘沉积发育优质烃源层系,热演化中等偏高,油气兼生;海相和陆相碎屑岩具有良好储集条件;海相和陆相蒸发相含膏岩系为优质盖层,生储盖配置关系良好,具有形成油气赋存的基本石油地质条件。Abstract: The foreland basin in the southeastern margin of the Dabie mountains experienced an evolution of marine sedimentation-marine-continental sedimentation-continental sedimentation and characterized by superimposed-composited pattern.From the deposit sequence of the foreland basin and combined with characteristics of source rocks and oil-gas system,it can be seen that the continental deposit system of the foreland during early Mesozoic overlies the marine deposit of the passive continental margin during late Paleozoic,and formed upper continental facies and lower marine facies hydrocarbon-bearing rock systems and oil-gas forming systems.Among the conditions,the key for oil-gas accumulation is development and preservation of the marine source rocks underlying the foreland basin.It proves that,the marine source rocks are high quality in the deposit on the passive continental margin during late Paleozoic period,moderate or higher geothermal evolution,which can produce oil and gas;the good container rock is marine-continental molasses;the high quality cover rock is gypsum rock in the marine-continental-evaporation facies,the correlation of generation-reservoir-cover rock is good,and which proved the foreland basin possess the basic conditions for oil-gas occurrence.
-
[1] 何明喜,杜建波,古哲等.下扬子北缘前陆盆地构造变形样式[J].石油实验地质,2006,28(4):322～324 [2] 何登发,吕修祥,林永汉等.前陆盆地分析[M].北京:石油工业出版社,1996.1～212 [3] 康玉柱.塔里木前陆盆地构造特征及油气分布[J].石油实验地质,2005,27(1):25～27 [4] 金之钧,汤良杰,杨明慧等.陆缘和陆内前陆盆地主要特征及含油气性研究[J].石油学报,2004,25(1):8～12 [5] 罗志立,李景明,李小军等.中国前陆盆地特征及含油气远景分析[J].中国石油勘探,2004,(2):1～11 [6] 何发岐,梅廉夫,费琪等.前陆盆地前缘隆起带圈闭的形成及其含油气性:以塔里木盆地沙雅隆起为例[J].石油实验地质,2006,28(5):418～423 [7] 张国伟.秦岭-大别造山带南缘勉略构造带与勉略缝合带[J].中国科学(D辑),2003,33(12):1121～1135 [8] 杜建波,何明喜,张艳霞等.下扬子北缘前陆盆地构造演化及沉积特征[J].石油实验地质,2007,29(2):133～137 [9] 袁志华,冯增昭,吴胜和.中扬子地区早三叠世大冶期岩相古地理研究[J].沉积学报,1999,17(1):38～43 [10] 常印佛,刘湘培,吴富昌.长江中下游铜铁成矿带[M].北京:地质出版社,1991.65～89 [11] 何明喜,刘池洋.盆地走滑变形研究与古构造分析[M].西安:西北大学出版社,1992.1～225 [12] 杨盛良.下扬子区中生界构造特征及油气远景[J].石油勘探与开发,1997,24(3):10～14 [13] 郭念发,雷一心.下扬子区中生界油气地质条件评价[J].石油实验地质,1998,20(4):103～109 [14] 陈沪生,张永鸿.下扬子及邻区岩石圈结构构造特征与油气资源评价[M].北京:地质出版社,1999.1～287 [15] 毕仲其,丁保良.下扬子区三叠系膏岩建造的沉积环境[J].火山地质与矿产,1997,18(2):127～136 [16] 郭彤楼.下扬子地区中古生界叠加改造特征与多源多期成藏[J].石油实验地质,2004,26(4):319～323 [17] 张淮,周荔青,李建.下扬子地区海相下组合油气勘探潜力分析[J].石油实验地质,2006,28(1):15～20 -
计量
- 文章访问数: 769
- HTML全文浏览量: 48
- PDF下载量: 248
- 被引次数: 0
下载:
苏公网安备32021102000780号