研究认为，孔洞型储层有效性与孔隙度及孔洞类型有关，且大孔孔洞型储层较小孔孔洞型储层有效。
Research shows that effectiveness of reservoir with cavern relates to porosity and the type of cavern, and reservoir with big cavern is more effective than with little one.
疏松砂岩稠油油藏孔隙度大，胶结疏松，粘土矿物含量偏高。
Heavy oil reservoir of loose sand is of large porosity, loose cementation and higher clay content.
经受差异压实作用后，岩层中的孔隙度在各地区能有相当大的变化。
The porosity in a formation that has experienced differential compaction can vary considerably from one area to another.
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