CAJ | 학술논문

在野外露头观察与实测的基础上，运用沉积学与层序地层的相关理论，对准噶尔盆地南缘四棵树剖面八道湾组沉积特征进行了详细研究。该剖面八道湾组为扇三角洲沉积，扇三角洲平原与扇三角洲前缘亚相均比较发育。运用层序地层学中基准面变化的原理，将八道湾组划分为2个长期旋回，并细分为3个中期旋回以及若干短期旋回。总结了露头区八道湾组A/S比值与地层叠加样式之间的响应关系：低A/S比值条件下，易形成连通性好的厚层叠加砂体，沉积微相类型较单一；中A/S比值条件下，易形成单层厚度较薄的、似毯状的、垂向上紧凑叠加的多层状砂体；高A/S比值条件下，泥岩更为发育，而砂体多呈孤立状，呈现厚层泥与薄层砂的沉积特点。通过详细解剖露头剖面八道湾组的沉积特征，最终建立了该区八道湾组扇三角洲沉积模式，为准噶尔盆地南缘扇三角洲油气储层的研究提供了借鉴。
재야외로두관찰여실측적기출상，운용침적학여층서지층적상관이론，대준갈이분지남연사과수부면팔도만조침적특정진행료상세연구。해부면팔도만조위선삼각주침적，선삼각주평원여선삼각주전연아상균비교발육。운용층서지층학중기준면변화적원리，장팔도만조화분위2개장기선회，병세분위3개중기선회이급약간단기선회。총결료로두구팔도만조A/S비치여지층첩가양식지간적향응관계：저A/S비치조건하，역형성련통성호적후층첩가사체，침적미상류형교단일；중A/S비치조건하，역형성단층후도교박적、사담상적、수향상긴주첩가적다층상사체；고A/S비치조건하，니암경위발육，이사체다정고립상，정현후층니여박층사적침적특점。통과상세해부로두부면팔도만조적침적특정，최종건립료해구팔도만조선삼각주침적모식，위준갈이분지남연선삼각주유기저층적연구제공료차감。
On the basis of observation and measurement in field,and with the application of sedimentology and high resolution sequence stratigraphy theories,a detailed study on the sedimentary characteristics of the Badao-wan Formation in Sikeshu section,southern Junggar Basin has been conducted.The fan delta system developed fan delta plain and fan delta front subfacies,and the sedimentary characteristics of the two kinds of subfacies are concluded.In the outcrop,two long-term stratigraphic cycles are identified and Badaowan Formation can be subdivided into three medium-term cycles,as well as the composition of a number of short-term cycles.This paper summarized the relationship between the A/S ratio with stratigraphic stacking patterns in outcrop area.A thick stacked sand body with good connectivity was formed in the low A/S ratio condition,and the types of sedi-mentary microfacies are single;In the medium A/S ratio condition,thin and blanket-like monolayer superim-posed in vertical,and formed compacted multilayer sand body.Mudstone and isolated sand bodies are deve-loped in the high A/S ratio condition rifely,and their internal structures are compacted with limited lateral ex-tension.Eventually,through detailed anatomy of the sedimentary characteristics of Badaowan Formation in the outcrop section,a fan delta sedimentary model of Badaowan Formation has been established,and provides refer-ence for fan deltas reservoir research in southern margin of Junggar Basin.