Quantitative prediction method for clastic rock reservoir cementing porosity decrement based on diagenetic process

The invention discloses a quantitative prediction method for clastic rock reservoir cementing porosity decrement based on the diagenetic process. The method comprises the steps that on the basis of research of the mineral cementing effect under different evolutionary phases and different diagenetic conditions in the clastic rock diagenetic process, mineral cementing responding mechanisms and cementing mathematic models under different diagenetic conditions are built, the reservoir physical property change rule influence of the cementing effect in the sediment burial diagenetic process is represented, then, the decrement condition of original pores in the reservoir evolutionary process is determined, and the basis is provided for reservoir evaluation. 本发明公开了种基于成岩过程的碎屑岩储层胶结减孔量的定量预测方法，该方法基于碎屑岩成岩过程中不同演化阶段、不同成岩条件下矿物胶结作用的研究，建立起不同成岩条件下矿物胶结响应机制以及胶结数学模型，再现沉积物埋藏成岩过程中胶结作用对储层物性变化规律影响，进而确定储层演化过程中原始孔隙的减少情况，为油藏评价提供依据。