Hydrocarbon accumulation characteristics and exploration prospects of stratigraphic unconformity in basin margin of Junggar Basin
-
摘要: 基于大量地质与地球物理资料,分析了准噶尔盆地盆缘地层不整合样式结构特征,研究并总结了盆缘不整合的油气成藏特征及模式,提出了今后的勘探方向.认为:准噶尔盆地多期构造运动与频繁岩相变化使得盆缘不整合广泛发育,在宏观样式上具有削超、削平、平行等3种类型,垂向上具有三层或二层结构,并形成了多种渗透性组合形式.受不整合样式结构及渗透性组合、盆缘地质背景、盆内源岩发育状况等的影响,盆缘不整合成藏具有三大特征,一是不整合可形成地层圈闭及其他相关类型圈闭;二是多油气来源、多充注期次、原生与次生油藏共存;三是不整合自身具一定输导能力,但横向输导范围有限,相关油藏中的油气需要由断层、骨架砂体以及不整合等构成的"断—毯"式输导体系进行运移.盆缘不整合相关油气藏具有较大勘探潜力,需要根据各地区油气发现情况与勘探程度有针对性地开展相关研究与评价工作.Abstract: Based on a large number of geological and geophysical data,it was analyzed in this paper the structural characteristics of stratigraphic unconformity styles in basin margin of the Junggar Basin.The hydrocarbon ac-cumulation feature and pattern were concluded,and the exploration prospect in the future was pointed out.Multiphase tectonic movements and frequent facies change in the Junggar Basin led to the wide development of unconformity in basin edge.In the macro style,three types of on lap truncation,leveled truncate and parallel conformity developed.In vertical direction,there were three or two layers,forming many combination forms of permeability.Influenced by unconformity style structure,permeability combination,geologic background in basin margin and source rock generation condition in basin,the accumulation of unconformity reservoir in basin margin has three characteristics.a) Unconformity trap can form stratigraphic trap and other related types.b) Hydrocarbon generates from multiple sources and charges during different phases.Primary and secondary reservoirs co-exist.c) Unconformity itself has a certain ability of conducting,but the scope of transverse conducting is limited and petroleum migrates along "fault-blanket" type migration systems formed by faults,framework sand body and unconformity.Basin edge unconformity reservoirs have great exploration potentials,so relevant research and eva-luation are needed to develop according to the exploration degree in each area.
-
[1] 郝芳.准噶尔盆地油气成藏条件及富集规律研究.乌鲁木齐:中国石化西部新区指挥部,2004. [2] 李丕龙,冯建辉,陆永潮,等.准噶尔盆地构造沉积与成藏[M].北京:石油工业出版社,2010. [3] 邰浩.准噶尔盆地西北缘二叠系不整合空间结构特征及控藏作用[J].山东科技大学学报:自然科学版,2010,29(5):24-28. [4] 曲江秀,查明,田辉,等.准噶尔盆地北三台地区不整合与油气成藏[J].新疆石油地质,2003,4(5):86-38. [5] 牟中海,何琰,唐勇,等.准噶尔盆地陆西地区不整合与油气成藏的关系[J].石油学报,2005,26(3):16-20. [6] 杨勇,查明.准噶尔盆地乌尔禾—夏子街地区不整合发育特征及其在油气成藏中的作用[J].石油勘探与开发,2007,34(3):16-20. [7] 陈建平,查明,柳广弟,等.准噶尔盆地西北缘斜坡区不整合面在油气成藏中的作用[J].石油大学学报:自然科学版,2000,24(4):75-78. [8] 吴孔友,查明,柳广弟.准噶尔盆地二叠系不整合面及其油气运聚特征[J].石油勘探与开发,2002,29(2):53-57. [9] 曹剑,胡文瑄,张义杰,等.准噶尔盆地油气沿不整合运移的主控因素分析[J].沉积学报,2006,24(3):399-406. [10] 吴孔友,查明,洪梅.准噶尔盆地不整合结构模式及半风化岩石的再成岩作用[J].大地构造与成矿学,2003,27(3):270-275. [11] 李秀鹏,于洁,许晶.准噶尔盆地乌夏断裂带输导体系对油气运聚的控制[J].断块油气田,2012,19(5):559-563. [12] 吴孔友.不整合结构对地层油气藏形成的控制作用研究[J].大地构造与成矿学,2012,36(4):518-524. [13] 吴孔友,白森,崔世凌.渤海湾盆地惠民凹陷南坡中生界顶部不整合结构特征及成藏作用[J].石油实验地质,2012,34(4):357-361. [14] 徐兴友.准噶尔盆地车排子地区油气成藏期次研究[J].石油天然气学报,2010,31(5):40-44. [15] 何琰,牟中海.准噶尔盆地不整合类型和分布规律[J].西南石油大学学报,2007,29(2):61-64. [16] 石昕,张立平,何登发,等.准噶尔盆地西北缘油气成藏模式分析[J].天然气地球科学,2005,16(4):460-463. [17] 刘太勋,查明,吴孔友.乌—夏地区不整合油气藏成藏数值模拟研究[J].西南石油大学学报:自然科学版,2011,33(4):14-18. [18] 徐怀宝,蔡正期,丁超,等.乌夏地区油气成藏主控因素分析[J].西部探矿工程,2011(2):108-111. [19] 吴孔友,李林林,查明.不整合纵向结构及其成藏作用物理模拟[J].石油实验地质,2009,31(5):537-541. [20] 隋风贵,宋国奇,赵乐强,等.济阳坳陷陆相断陷盆地不整合的油气输导方式及性能[J].石油大学学报,2010,34(4):44-48. [21] 宋国奇,隋风贵,赵乐强.济阳坳陷不整合结构不能作为油气长距离运移的通道[J].石油学报,2010,34(4):744-747. -
计量
- 文章访问数: 1480
- HTML全文浏览量: 134
- PDF下载量: 772
- 被引次数: 0
下载:
苏公网安备32021102000780号