摘要
Based on bulk analyses of casted thin section, scanning electro microscope, cathode luminescence and X radial-diffract, the types and main controlling factors of sandy conglomerate reservoir diagenesis in north steep slope of Bonan subsag were studied. The diagenetic evolution stage was divided and the controlling functions of different diagenetic facies to reservoir quality were also analysed. The results indicated that the lower Es3 and Es4 sandy conglomerate reservoirs were in the middle diagenetic phase A1 to A2, which corresponded to the main hydrocarbon generating period of organic matter. Reservoirs controlled by strong consolidation and later carbonate cemented diagenetic facies have bad physical property. Studies above are of great importance in looking for favorable reservoirs.