成岩作用及阶段对碎屑岩储层孔隙演化的控制

碎屑岩储层孔隙演化受有机-无机成岩作用的影响，在埋藏成岩阶段，有机质成熟过程中脱羧作用产生的有机酸对碎屑岩中的方解石、长石等溶蚀所形成的次生扎隙，是深部储层中高孔渗段发育的重要原因，随埋深增加，成岩阶段由早-晚发展，有机质由未成熟-成熟演化，在此期间，储层孔隙经历了消亡与新生的发展过程。在同一盆地中，不同层位储层经历的最大埋深如果相近，所处成岩阶段也相近，其孔隙演化史亦趋于相似;反之，同一层位的储层所处的最大埋深不同，成岩阶段不同，其孔隙特征也就不同。

Reservoirs Pores Evolution under the Control of Diagenesis and Stage

Clastic rock reservoirs pores evolution is affected by organic-inorganic diagenesis. At the' buried diagenesis stages，the important cause for high Porosity and permeability in deep-buried reservoirs is the secondary pores produced by the corrosion of calcite and feldspar from the process of the dehydroxylation of organic acid in thermal evolution. With the in-crease of buried depth，diagenesis stagds will experience an evolution from early to late phas-es，and organic matter from non-maturity to maturity. Meanwhile，the reservoirs pores will also undergo an evolution from decline to re-growth. In the same ,basin, if the reser- voirs in different beds possess the same buried depth，their diagenesis phases and pores evo-lution will be the same. Otherwise，even the reservoirs in the same beds will have different diaginesis phases and pores evolution.