塔里木盆地塔中地区奧陶系古潜山的地质地球物理特征和控制因素  

Geological-geophysical signatures and controlling factors of the Ordovician buried hills in Central Tarim Basin

作　　者：马玉春[1,2] 王璞珺[3] 田纳新[4] 李丽贤[4] 唐华风[3] 田纹全[3] 

机构地区：[1]中石化石油勘探开发研究院西部分院 [2]河南石油勘探局研究院,河南南阳473000 [3]吉林大学地球科学学院 [4]河南石油勘探局研究院

出　　处：《世界地质》2004年第2期138-143,162,共7页World Geology

基　　金：教育部留学回国人员科研启动基金项目资助

摘　　要：奧陶系碳酸盐岩古潜山是塔里木盆地古生代的主要油气储层类型。塔中地区下奥陶统发育有三套灰岩/白云岩岩溶层,主要形成于早石炭世,单层厚几米至几十米。洞穴层的电测曲线特征表现为两高两低:低电阻和低密度,高声波时差和高自然伽玛;地震反射层表现为弱振幅、波数增多、水平反射短轴3项地震反射异常。潜山顶部古风化壳发育程度受构造条件(包括构造裂隙)、岩性。Ordovician buried hills of carbonates are importantrese rvoirs of oil and gas in Tarim Basin. Three lved dolomite/calcite layers were recognized in the vertical sequence of the Ordovician in Central Tarim Basin. They formed during Carboniferous and with single sickness of ca. ten to some tens meters. Well-logging of the dissolved layers shows low in both resistivity(RD & RS)and density(DEN)and high in acoustic log(AC) and gamma-ray(GR). Their seismic reflections show weak amplitude,multiple wavenumber,anomaly of frequency,amplitude and velocity. The controlling factors on the Ordovician buried hills in the Central Tarim Basin mainly include structure,lithology,palaeowater table,sea level change and palaeoclimate.

关 键 词：塔里木盆地 塔中隆起 奥陶系 碳酸盐岩古潜山 

分 类 号：P631[天文地球—地质矿产勘探]