伊通盆地岔路河断陷粘土矿物特征及其对储层物性的影响

粘土矿物的类型和含量对储层的物性有着较大的影响。伊通盆地岔路河断陷储层属于中低孔、低渗储层。据粘土矿物X射线衍射分析,结合电镜扫描等资料分析研究,得出了储层的孔隙度、渗透率随粘土矿物的含量、成分、产状的变化关系。研究表明,粘土矿物的绝对含量与孔隙度和渗透率呈现负相关性,且其对渗透率的影响明显要比对孔隙度的影响大。随着伊利石含量的增加,砂岩的渗透率有减小的趋势;而随着高岭石含量的增加,砂岩的渗透率有增大的趋势,孔隙度随粘土矿物相对含量的变化不显著。

Clay minerals and their effects on physical properties of the hydrocarbon reservoirs in the Chaluhe depression,Yitong Basin,Jilin

The sandstone reservoirs in the Chaluhe depression, Yitong Basin, Jilin have moderate to low porosity and low permeability. The types and contents of clay minerals tend to have an important effect on the physical properties of the hydrocarbon reservoirs. The results of SEM and X-ray diffraction analysis have revealed that there is a negative correlation between the absolute contents of clay minerals and their porosity and permeability. The permeability tends to decrease in response to the increase of the contents of illite, and to increase in response to the increase of the contents of kaolinite. The porosity is less variable in response to the relative contents of the clay minerals.