摘要
塔里木盆地塔中地区中、上奥陶统发育多种类型生物礁 ,主要造礁生物包括海绵、托盘类、层孔虫、珊瑚、隐藻类、苔藓虫、蓝绿藻、绿藻、管孔藻科红藻等 ,主要礁体类型为灰泥丘和少量的骨架礁、障积礁。分析钻探揭示的生物礁特征 ,结论是灰泥丘主要形成于棚内及棚缘内带环境 ,骨架礁与障积礁主要形成于棚内与棚缘环境。通过沉积相分析和地震反射特征研究 ,预测塔中地区的陆棚边缘相带和塔中北部斜坡的中部地带 ,有望找到带状或断续带状分布的生物礁带。塔中 1号断裂西端的顺托果勒西区块已发现 6个地震异常反射体 ,从其发育层位、所处环境和内部反射特征来看 ,极可能是生物礁丘。图 2表 2参
TherearemanydifferentkindsofreefinTazhongAreaof TarimBasin ,NorthwestChinainageofMedium UpperOrdovician .Themainreef buildingorganismsareSponges , Calathium ,Stromatoporoids ,Corals ,Crytalgaes,Bryozoans,Blue greenalgae ,ChorophyteandRhodophyteinSolenoporaceae .Thereefcanbedividedintocalcilutitemound ,frameworkreefand bafflereef .Theanalyzingonthereefencounteredduringthe drillingshowsthatthecalcilutemoundismainlyformedin continentalshelfandinnerzoneoftheshelfmargin ,while frameworkreefandbafflereefaremainlyintheshelfandtheshelf margin .Andbystudyingthesedimentaryfaciesandthefeaturesof seismicreflectioninthisarea ,itcanbepredictedthatreefwiththe distributionshapesofbeltanddiscontinuousbeltcanbefoundinthe shelfmarginareaofTazhongUpliftandinthemiddleareaof northernslopeofTazhongArea .Especially ,theareasatthewest endofNo .1fractureofTazhonginwestShutuoguoleblock ,upto nowsixanomalyreflectionbodieshavebeenfound .Dependingon thecharactersofenvironmentandfeaturesofinteriorreflectionthey areverylikelythereefmounds .Itwillhavegreateffectsontheoil andgasexplorationofthisareaincaseofthatmoreplaywouldhave beenprocessed .
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第2期33-36,共4页
Petroleum Exploration and Development
关键词
塔里木盆地
塔中地区
生物礁
特征
分布
灰泥丘
骨架礁
障积礁
棚内
棚缘
油气勘探
TarimBasin
TazhongArea
reef
calcilutitemound
frameworkreef
bafflereef
continentalshelf
shelfmargin
oiland gasexploration
