地层基准面原理在TC2井层序分析中的应用  

AN APPLICATION OF STRATIGRAPHIC BASE-LEVEL PRINCIPLE IN SEQUENCE ANALYSIS OF WELL TC2

作　　者：沈守文[1] 彭大钧[2] 颜其彬[1] 黄先律[2] 李志军 

机构地区：[1]西南石油学院石油勘探系,四川南充637001 [2]成都理工学院 [3]吐哈油田

出　　处：《西南石油学院学报》1999年第4期42-45,56,共5页Journal of Southwest Petroleum Institute

基　　金："油气藏地质及开发工程"国家重点实验室开放基金

摘　　要：为了提高层序地层分析的分辨率和储层预测的准确性，运用Ｃｒｏｓｓ ＴＡ 等人倡导的地层基准面原理，对ＴＣ２ 井进行了基准面旋回识别和高频层序划分：中期旋回与层序相对应，一般表现为完整的基准面上升和下降旋回，只有冲积层序（Ｓ１１、Ｓ１２ 、Ｓ１３） 缺失下降旋回沉积；上升旋回包括低水位和水进体系域；下降旋回属高水位体系域，其转折点是密集段；短期旋回相当于准层序。所识别出的３ 种准层序类型，与早期经典层序地层学的慨念有所不同。研究结果对砂层组的精细对比以及油气藏的预测具有重要意义。Base-level circles and high-frequency sequences for the formations of well tc2 were identified in the light of stratigraphic base-level principle proposed by t. A. Cross. The middle circle fits the sequence, which is indicated by a whole base-level rising and downward circle, and only the fluvial sequences (s11, s12, s13) lack downward circle deposition; the rising circle includes low-stand and water progradation system; the downward circle belongs to high-stand. The results are significant for accurate correlation of sand layers and prediction of reservoirs in the studied area. The three types of parasequence were distinguished in this paper, which are different from the concept of classic sequence stratigraphy.

关 键 词：地层基准面 层序分析 层序地层 TC2井 储集层 

分 类 号：P618.130.2[天文地球—矿床学]