松辽盆地大庆长垣形成时间的厘定及其地质意义

发布时间：2018-04-21 08:39

本文选题：生长地层 + 形成时间　；参考：《吉林大学学报(地球科学版)》2017年01期

【摘要】：大庆长垣位于松辽盆地北部一级构造单元中央坳陷区内,是松辽盆地中隆升幅度最高、规模最大的背斜,由于其含有十分丰富的油气资源,长期以来备受瞩目,但其形成时间一直存在很大争议。通过对大庆长垣二维、三维地震剖面解析,应用生长地层理论,厘定大庆长垣的形成时间,并探讨其地质意义。研究发现:大庆长垣呈近NNE走向,为一个与近NWW—SEE向挤压作用有关的大型背斜。大庆长垣背斜北部嫩江组—明水组(T_1-T_(02))、中部嫩江组四段—明水组(T_(05)-T_(02))、南部四方台组—明水组(T03-T02)自构造高部位向低部位厚度逐渐增大,为与大庆长垣背斜隆升相伴沉积的一套生长地层;下伏地层在大庆长垣背斜顶部、翼部及两侧向斜部位厚度基本相等,具有前生长地层特征。大庆长垣背斜自嫩江组沉积初期受到近NWW—SEE向挤压作用开始隆升,一直持续到明水组沉积末期,但大庆长垣背斜不同构造部位的隆升时间、隆升速率及隆升高度都有所不同。松辽盆地晚白垩世的挤压作用可能与太平洋板块的俯冲作用有关,对油气的运移和聚集成藏有很大的影响。
[Abstract]:The Daqing Placanticline is located in the central depression of the primary structural unit in the northern Songliao Basin. It is the anticline with the highest uplift and the largest scale in the Songliao Basin. It has been attracting much attention for a long time because of its rich oil and gas resources. But its formation time has been very controversial. By analyzing the 2D and 3D seismic profiles of Daqing Placanticline and applying the growth stratigraphic theory, the forming time of Daqing Placanticline is determined and its geological significance is discussed. It is found that Daqing Placanticline is a large anticline related to near NWW-SEE compression. In the north of Daqing anticline, the thickness of Nenjiang formation-Mingshui formation is gradually increasing to the lower part, while that of Nenjiang formation to Mingshui formation is increasing gradually, while that of Nenjiang formation to Mingshui formation is increasing gradually, and the thickness of T _ (03-T _ 02) is increasing gradually to the lower part of the structure, and the thickness of T _ (03-T _ 02) is increasing gradually from the high part to the lower part of the structure. It is a set of growing strata associated with the uplift of Daqing anticline, the underlying strata are located at the top of the Daqing anticline, the thickness of the wing and the two sides of the syncline are basically equal, and it has the characteristics of pre-growth strata. The Daqing anticline began to uplift from the early deposition stage of Nenjiang formation by near NWW-SEE compression until the late stage of the Minshui formation, but the uplift time, uplift rate and uplift height of the Daqing anticline are different. The compressibility of the late Cretaceous in Songliao Basin may be related to the subduction of the Pacific plate and has great influence on the migration and accumulation of oil and gas.
【作者单位】：吉林大学地球科学学院;大庆油田勘探开发研究院;
【基金】：中国地质调查局工作项目(1212011085484) 国家自然科学基金项目(41072150)~~
【分类号】：P618.13

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