吉林大学学报(地球科学版)
吉林大學學報(地毬科學版)
길림대학학보(지구과학판)
JOURNAL OF JILIN UNIVERSITY(EARTH SCIENCE EDITION)
2015年
1期
13-24
,共12页
陈欢庆%梁淑贤%舒治睿%邓晓娟%彭寿昌
陳歡慶%樑淑賢%舒治睿%鄧曉娟%彭壽昌
진환경%량숙현%서치예%산효연%팽수창
准噶尔盆地%下克拉玛依组%冲积扇%砾岩储层%储层构型%油田开发
準噶爾盆地%下剋拉瑪依組%遲積扇%礫巖儲層%儲層構型%油田開髮
준갈이분지%하극랍마의조%충적선%력암저층%저층구형%유전개발
Junggar basin%Lower Karamay Formation%alluvial fan%conglomerate reservoir%reservoir architecture%oilfield development
冲积扇砾岩储层作为陆相沉积储层十分重要的类型之一,一直是我国油气勘探开发的重点领域。以准噶尔盆地西北缘某区下克拉玛依组为例,根据砾岩储层相变快、储层非均质性强等特点,在沉积相分析的基础上,对储层构型特征进行了精细分析,将储层划分为槽流砾石体、槽滩砂砾体、漫洪内砂体、漫洪内细粒、片流砾石体、漫洪外砂体、漫洪外细粒、辫流水道、辫流砂砾坝、漫流砂体、漫流细粒、径流水道和水道间细粒共13种构型单元,其中以槽流砾石体、片流砾石体、辫流水道和辫流砂砾坝占主导。构型解剖结果显示:研究区砾岩储层槽流砾石体平面呈条带状,剖面厚度大,为2~8 m;片流砾石体沉积厚度大,一般为2~7 m;辫流水道构型单元宽度为80~400 m,剖面呈透镜状,厚度为2~7 m;辫流砂砾坝沉积厚度较大,为2~7 m。上述构型单元受北部和西北部方向物源控制明显。储层构型特征能有效反映储层非均质性、连通性等属性,对油田开发具有较强的控制作用。
遲積扇礫巖儲層作為陸相沉積儲層十分重要的類型之一,一直是我國油氣勘探開髮的重點領域。以準噶爾盆地西北緣某區下剋拉瑪依組為例,根據礫巖儲層相變快、儲層非均質性彊等特點,在沉積相分析的基礎上,對儲層構型特徵進行瞭精細分析,將儲層劃分為槽流礫石體、槽灘砂礫體、漫洪內砂體、漫洪內細粒、片流礫石體、漫洪外砂體、漫洪外細粒、辮流水道、辮流砂礫壩、漫流砂體、漫流細粒、徑流水道和水道間細粒共13種構型單元,其中以槽流礫石體、片流礫石體、辮流水道和辮流砂礫壩佔主導。構型解剖結果顯示:研究區礫巖儲層槽流礫石體平麵呈條帶狀,剖麵厚度大,為2~8 m;片流礫石體沉積厚度大,一般為2~7 m;辮流水道構型單元寬度為80~400 m,剖麵呈透鏡狀,厚度為2~7 m;辮流砂礫壩沉積厚度較大,為2~7 m。上述構型單元受北部和西北部方嚮物源控製明顯。儲層構型特徵能有效反映儲層非均質性、連通性等屬性,對油田開髮具有較彊的控製作用。
충적선력암저층작위륙상침적저층십분중요적류형지일,일직시아국유기감탐개발적중점영역。이준갈이분지서북연모구하극랍마의조위례,근거력암저층상변쾌、저층비균질성강등특점,재침적상분석적기출상,대저층구형특정진행료정세분석,장저층화분위조류력석체、조탄사력체、만홍내사체、만홍내세립、편류력석체、만홍외사체、만홍외세립、변류수도、변류사력패、만류사체、만류세립、경류수도화수도간세립공13충구형단원,기중이조류력석체、편류력석체、변류수도화변류사력패점주도。구형해부결과현시:연구구력암저층조류력석체평면정조대상,부면후도대,위2~8 m;편류력석체침적후도대,일반위2~7 m;변류수도구형단원관도위80~400 m,부면정투경상,후도위2~7 m;변류사력패침적후도교대,위2~7 m。상술구형단원수북부화서북부방향물원공제명현。저층구형특정능유효반영저층비균질성、련통성등속성,대유전개발구유교강적공제작용。
Being one of the important kind of reservoir,conglomerate reservoir always was hotpot area to explorationists and developers of oilfield.Taking Lower Karamay Formation of some area in northwest margin of Junggar basin as an example,it characteristics of sedimentary facies quick changes and heterogeneity intensity.reservoir architecture characteristics were finely analyzed on the base of sedimentary facies studied.The reservoirs were carved into thirteen kind of architecture,such as, channel flow conglomerate,channel beach conglomerate,sandstone of inner belt of sheet flood,fine grained of inner belt of sheet flood,laminar flow conglomerate,sandstone of exterior belt of sheet flood, fine grained of exterior belt of sheet flood,braided channel,braided sandstone-conglomerate dam, sandstone of unconcentrated flow,fine grained of unconcentrated flow,streamflow channel,fine grained between streamflow channels.And channel flow conglomerate and laminar flow conglomerate and braided channel and braided sandstone-conglomerate dam take the leading roles.The results of reservoir architecture analyzed indicated development laws of different kind of architecture. Channel flow conglomerates extend like banding,and had thickness from two meters to eight meters.Laminar flow conglomerates are two meters to seven meters in vertical section.Braided channels are wide about eighty meters to four hundred meters.Braided sandstone-conglomerate dams take thickness about two meters to seven meters.All kinds of architecture are controlled by the sedimentary source of north and north-west directions.Reservoir architecture characteristics could finely reflect the properties of reservoir of heterogeneity and connectivity.And it has an important controlled function to oilfield development.