Abstract: Though predecessors have done some studies of the calcareous layers (Namely the sandstones which is
rich in calcite cements and bioclasts， called calcareous layers for short， hereafter. ) that distribute in the Zhujiang
formation reservoir of Qionghai Bulge， Beginning with studying the relationship between diagenism and sequence
stratigraphy， this paper compares the calcareous layers in section 1 with section 2， Zhujiang Formation of WC13-
1/13-2oilfield， andanalyzeshowthedepositionalsystemcontrolsmineralionsandthenfurtherstudythedistribution
law of calcareous layers units the diagenetic evolution of stones. The studies show that the formation of Calcareous
layers of Zhujiang Formation has the same master control factor， which is depositional system tract. And from
section 2 to section1， the diagenesim has certain continuance and discontinuity.

Key words: Qionghai Bulge, Calcareous Layer, Diagenetic Model, Calcite （Fe）, cement