摘要
上侏罗统碎屑岩为成熟度低的岩屑砂岩，岩石经历了多种成岩变化，降低孔隙度的成岩作用主要为压实作用和方解石、沸石、伊利石及绿泥石的胶结作用，增大孔隙度的成岩作用为溶蚀作用。储层有５种成岩演化序列，相应的有５种成岩相，以绿泥石胶结成岩相储层物性最好。成岩相与沉积相、成岩作用阶段及最大埋深有关。成岩相分布决定了储层分布，从而可利用成岩相较准确预测储层发育带。
The clastic rock of Upper Jurassic Series is a low mature litharenite. Many diageneses have happened in reservoirs. The diageneses which decrease the porosity of reservoirs are compaction, cementation of calcite, zeolite, illite and chlorite. The diagenesis which increases the porosity of reservoirs is corrosion. There are five diagenetic sequences and facieses in reservoirs. The diagenetic facies of chlorite cement has the highest porosity of all the facieses. Diagenetic facieses are correlated with sedimentary facieses, diagenetic periods and maximum burial depth. Since reservoirs are decided by diagenetic facieses, reservoirs can be accurately forecast by them.
出处
《西南石油学院学报》
CSCD
1996年第4期9-14,共6页
Journal of Southwest Petroleum Institute
