碎屑岩中黏土矿物对储层物性的影响

Influence of Clav Minerals in Clastic Rock on Reservoir Properties

通过对碎屑岩储层中的高岭石（K）、蒙皂石（S）、伊利石（I）、绿泥石（C）以及伊利石／蒙皂石，（I/S）混层和绿泥石／蒙皂石（C/S）混层等黏土矿物的成因、特征及成岩转化的研究，来分析它们对储层的孔隙度、渗透率和含水饱和度等物性的影响。研究发现，这几种常见粘土矿物对储层物性的影响，既有建设性的一面，又有破坏性的一面。建设性主要表现在粘土薄膜对上覆岩石的抗压性、对次生孔隙的改造及时晶间孔的保存等方面；而破坏性主要表现在各种粘土矿物对外来流体具有的敏感性造成储层伤害，自生粘土薄膜占据孔隙空间导致储层孔隙度和渗透率降低．以及大的比表面积和强的阳离子交换能力造成含水饱和度的上升．、

clastic reservoir in kaolinite （K）, smectite （S）, illite （1）, chlorite （C） and illite / smectite / （I/S） mixed layer and chlorite / smectite （C/S） mixed layer clay minerals such as the causes, characteristics and diagenetic transformation of research, to analyze their reservoir porosity, permeability and water saturation and other properties of . The study tbund that several common physical properties of clay minerals on reservoir effect, both the constructive side, another destructive side. Constructive and is mainly manifested in the overlying clay films on rock＇s nature of resistance to the transformation of secondary pores and the preservation of intergranular iloles, etc.; while destructive is mainly manifested in a variety of clay minerals with a sensitivity to external fluid caused by reservoir damage, self-clay films occupy the pore space lead to reduction of reservoir porosity and permeability, as well as a large surface area and strong cation exchange capacity caused by water saturation nlcreases