摘要
沉积成熟度低、富含牵引流成因的流水构造是辫状河三角洲的沉积特征。以吐哈盆地温米油田中侏罗统三间房组为例，对辫状河三角洲前缘砂体特征分析认为：湖盆可容空间较小时，辫状河三角洲相对发育，水下分支河道横向迁移频繁，易形成席状分布的砂体（水下分支河道复合作）；可容空间增大时，辫状河三角洲相对不发育，这时水下分支河道延伸不远，河道砂体较孤立，河口砂坝相对比较发育。利用地震测井约束反演不仅提高了原始资料的垂向分辨率，而且可预测砂体的横向分布，使地下地质情况的认识从井孔扩展到井间，从一维扩展到二维和三维空间。
The deposition features of the braided deltas are low sedimentary maturation and current structures of traction current enriched origin. This paper analyed the sandbodies characteristics of braided delta front in Sanianfang formation of Middle Jurassic in Wennd oiffield, Tmpan-Hami basin, it is considered that when the accomodation space of the lake basin is smaller, the braided deltas are well developed, and the underwater distributare charmels frequenily shifted laterally, so as to form sheet-like sandbodies (complex of the distributary channels), when it became larger, the braided deltas are less developed, and the underwater distributary channels can not strench too far away and channels sandbodies are much more isolated, while the mouth bars are relatively more developed. The log-constrained inversion of multi-wells can improve the vertical resolution of data and allow the knowledge of geologic conditions extend from borehole to interwell, from one dimension to two and three dimensions.
出处
《新疆石油地质》
CAS
CSCD
1999年第5期402-404,共3页
Xinjiang Petroleum Geology
关键词
吐鲁番盆地
哈密盆地
中侏罗纪
沉积相模式
油田
Turpan basin Hami basin Middle Jurassic Braided river Delta front facies Depositional model Inversion Prediction
