摘要
在准噶尔盆地腹部油气勘探已成为寻找储量的主要方向,但研究程度低未取得重大突破,因此研究区的基础工作尤为重要。本文应用层序地层学的方法,将研究区侏罗系地层划分为7个三级层序;利用地震反射波的振幅、连续性、内部反射结构和外部集合形态等在本区地震反射剖面上识别出充填相、前积相、丘状相、中振中(高)连续亚平行席状相、强振幅相及乱岗状相等六种地震相类型。研究表明,这些地震相在平面上分布部位明确,垂向上具有继承性和差异性,以单井相作为约束,完成地震相到沉积相的转化,划分出半深湖,滨浅湖,三角洲等沉积相类型,提出了有利的储集相带,指导下一步的勘探工作。
The exploration of oil and gas in the centre of Junggar basin has become the main direction of searching reserves,but a significant breakthrough has not been due to the lower research degree.So the basic work of this area seems especially important.Based on the principles of sequence stratigraphy,the Jurassic formation of study area is divided into 7 third-grade sequences;According to the characteristics of seismic reflection such as wave amplitude, continuity,internal reflections textures and external set forms etc,six types of seismic facies,filling facies,fore-set facies,dome-shaped facies,medium amplitude medium or high continuous sub-parallel sheeted facies,high amplitude facies and chaotic facies are identified from the seismic reflection.Studies showns that these seismic facies' distribution in plane is specific with vertical heritage and difference,Taking the single well facies as restraint conditions,we have finished the facies conversion of seismic to sedimentary.Several facies such as semi-deep lacustrine,shore-shallow lacustrine and deltaic systems have been divided,also,some favorable facies belts was putted forward.All these achievements will provide guidance for further exploration.
出处
《内蒙古石油化工》
CAS
2012年第13期127-132,共6页
Inner Mongolia Petrochemical Industry
关键词
准噶尔盆地
侏罗系
层序地层
地震相
沉积相
Junggar basin
Jurassic Formation
sequence stratigraphy
seismic facies
sedimentary facies
