志丹双河油田走马梁地区长6地层划分与对比  

Correlation and Division of the Chang 6 Strata in the Zoumaliang Area of Zhidan Oilfield

作　　者：陶华 王建民 TAO Hua;WANG Jianmin(School of Earth Sciences and Engineering,Xi’an Shiyou University;Shaanxi Key Laboratoryof Petroleum Accumulation Geology,Xi’an 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院 [2]陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《延安大学学报（自然科学版）》2021年第4期75-80,共6页Journal of Yan'an University：Natural Science Edition

基　　金：油气藏地质及开发工程国家重点实验室开放基金课题(PLC20190203)。

摘　　要：通过对志丹双河油田走马梁地区地质概况及地层对比划分研究,了解研究区地层特征,为进一步研究油气分布规律打下基础。对走马梁地区地层沉积的地质背景、发育的地质标志性岩石层、目的层所发育的沉积旋回、岩性组合进行总结分析,结合以上指示特征将走马梁研究区内的长6地层进行划分为长6^(1)、长6^(2)、长6^(3)、长6^(4)四个小层,通过绘制地层剖面展布以及平面展布图发现走马梁地区长6地层东西向分布呈现西低东高、南北向呈现较平缓的分布趋势。长6地层沉积厚度约125~145 m,其中长6^(1)、长6^(2)厚度相对长6^(3)厚,长6^(4)厚度最小,长6地层中各小层沉积厚度呈现延物源方向地层厚度较大的特征。Through studying the geology,strate division and correlation in the Zoumaliang area of the Zhidan Shuanghe Oilfield,a solid foundation was laid for further research on oil and gas distribution.In order to compare and divide the Chang 6 strata,summary and analysis were conducted regarding the geological background of stratigraphic deposits in the area,the developed geological landmark rock layers,and the sedimentary cycles and lithological combinations developed in the target layer.Combining the above indicators,the Chang 6 strata in the Zoumaliang study area is divided into four small layers:Chang 61,Chang 62,Chang 63,and Chang 64.By drawing the stratigraphic cross-section distribution and plane distribution diagrams,it is found that the east-west distribution of the Chang 6 strata in the Zoumaliang area shows a trend of decline in the west and rise in the east,and a relatively moderate distribution trend in the north-south direction.The deposition thickness of the Chang 6 formation is about 125-145m,of which the thickness of Chang 61 and Chang 62 are relatively thicker than that of Chang 63,and the thickness of Chang 64 is the lowest.The deposition thickness of each small layer in the Chang 6 formation is characterized by a larger thickness in the direction of the source.

关 键 词：志丹双河油田走马梁地区 长6 地层划分与对比 

分 类 号：P588.2[天文地球—岩石学]