罗151块沙三段接触变质岩特征及变成孔隙  

Contactolite characteristics and metamorphic pores in Es_3 of Luo 151 block

作　　者：谢忠怀[1] 

机构地区：[1]中国石油大学(华东)

出　　处：《油气地质与采收率》2007年第1期15-17,共3页Petroleum Geology and Recovery Efficiency

基　　金：中国石油化工集团公司科学技术研究开发项目"济阳坳陷特殊及隐蔽油气藏研究"(P99049)的部分成果

摘　　要：利用岩石薄片、扫描电镜和X衍射等实验技术手段，在对罗家地区罗151和罗152等井的古近系低压接触变质岩岩石学特征和变质亚带划分的基础上，通过对变质矿物共生组合和变质反应分析认为，罗151块接触变质岩储层段属于低压角闪石角岩相，变质的主蜂温度为430—670℃；孔隙空间主要是围岩接触变质阶段产生的变质原生孔隙，并计算出矿物变质反应前后摩尔体积的变化率。由此提出了变成孔隙的概念，较好地解释了该区辉绿岩外接触变质带孔隙发育的原因。Iithological characteristics and metamorphic belt of Eogene low-pressure contactolite of Luo 1S1 and Luo 152 wells in Luojia area are divided through the tools of thin slice observation, scanning election microscope and X-ray diffraction. Metamorphic mineral association and metamorphic reaction show that the contactolites of reservoir interval belong to a low-pressure hornblende homfels fades,while peak value of the metamorphism is 430 - 670℃. Pore spaces are mainly produced by the contact metamorphism of the surrounding rocks. Variance ratio of mol volume before and after metamorphic reaction of the mineral is calculated. At last, the concept of metamorphic pore is advanced,which can be used to interpret the cause of pore development at the external contact metamorphic belt of diabase well.

关 键 词：接触变质岩 变质矿物 变质反应 变成孔隙 罗151块 

分 类 号：TE112.222[石油与天然气工程—油气勘探]