鄂尔多斯盆地木匠沟地区油页岩分布规律研究及资源量计算

Distribution Study and Resources Calculation of Oil Shale in Mujianggou Area,Ordos Basin

鄂尔多斯盆地木匠沟地区油页岩是一套与煤伴生的油页岩沉积,其主要油页岩矿层分布在煤层的底部,厚度一般为1～2.5m,由东南到西北方向逐渐变薄,埋深逐渐变大,油页岩的分布受沉积环境和构造的控制。通过含油率、单井油页岩特征分析以及油页岩露头观察分析,明确了木匠沟地区油页岩的分布规律,在地势较低的区域油页岩的厚度较大,地势较高的区域较薄或尖灭;总结了油页岩的沉积特征及模式,油页岩分布于湖湾沉积环境,并最终计算了该地区页岩油的资源量。

Oil shale in Mujianggou Area of Ordos Basin is a set of oil shale sediments associated with coal,and the major oil shale layers are mainly distributed at the bottom of coal bed,with the thickness ranging from 1m to 2.5 m.These oil shale layers get thinner gradually from southeast to northwest,of which the burial depth gets larger.Oil shale distribution is controlled by sedimentary environment and structures.Through oil-bearing rate analysis,single-well oil shale features analysis,and oil shale outcrop survey analysis,the distribution law of oil shale in Mujianggou Area is determined.Oil shale is thicker in the low-lying area,while it is thinner or dies out in higher area.This paper also sums up the sedimentary features and models of oil shale which is distributed in the sediments of bays and lakes.Finally the resources of oil shale in the area are calculated.