中文摘要：

成岩作用是影响油气储层质量的重要因素，而对于埋藏过程中各种化学成岩作用的有效预测直接关系到储层的评价和预测。为了探索油气储层埋藏成岩过程中主要成岩作用对储层质量影响的预测方法，本文利用地球化学热力学的理论，分析了影响储层质量的主要化学成岩作用，包括砂岩中长石的溶解作用、碳酸盐矿物的溶解与沉淀作用和方解石-白云石的转化作用，建立其埋薇条件下溶解-沉淀的地球化学热力学模型。通过这些模型，试图利用地球化学趋势定量地预测砂岩储层次生孔隙的发育趋势、碳酸盐岩埋藏岩溶-充填趋势和埋藏白云石化趋势，为储层评价预测提供理论依据。

英文摘要：

Diagenesis plays an important role in reservoir quality. Prediction of chemically diagenetic trend is the key of reservoir evaluation. In order to search after the predicting method for reservoir quality basing on the diagenesis, thermodynamic models of some main kinds of diagenesis affecting porosity and permeability, including dissolution of feldspars, carbonate minerals and calcite-dolomite equilibrium, have been constructed. With the help of these models, we can calculate the dissolution-precipitation trend of diagenetic minerals. Based on these trends, we can analyze the developing extent of secondary pores in clastic reservoirs, karstification and dolomitization in carbonate reservoirs, which provide the geochemical data for the reservoir evolution.