Due to the lower compositionmaturity, compressive strength is weak, and compaction is strong. The low compositionmaturity are mainly responsible for poor reservoir properties.
泉四段砂岩颗粒成成份成熟度低，岩石的抗压性弱，压实作用强，低成份成熟度是导致储层物性差的重要原因；
2
Analysis results of a number of testing data indicated that: sandstone reservoir of Fu-Yang oil-bearing layer has lower compositionmaturity, mainly are feldspathic arenite and lithic arkose.