碱性成岩作用及其在济阳坳陷的应用展望

Alkali diagenesis and its application in Jiyang Depression

研究成岩作用的目的在很大程度上是为次生孔隙的评价和预测服务的,成岩环境是影响次生孔隙形成及分布的最重要因素之一。根据地层水的性质可以将成岩环境划分为酸性成岩环境和碱性成岩环境,它们一般出现于成岩过程的不同阶段,酸性成岩环境常对储集空间的形成造成较大影响,但是在某些情况下也能出现总体以碱性成岩环境为背景的成岩作用,即碱性成岩作用。碱性成岩作用可以促使人们加强对成岩环境及其影响的认识和研究,正确认识储层不同成因类型的孔隙,为储层的评价和预测提供新的思路,也可以为一些相关地质问题提供新的解释。济阳坳陷内有些地区(如渤南洼陷)或层位具有存在碱性成岩作用的条件,有必要进行探索性研究。

The evaluation and forecasting of secondary pore are the main purpose of diagenesis research, and diagenetic environment is one of the most important factors influencing the forming and distribution of secondary pores. Diagenetic environment can be divided into acid diagenetic environment and alkali diagenetic environment according to the characteristics of formation water. Both diagenetic types appear in different diagenetic stages, and acid diagenetic environment usually takes a more important part in the development of reservoir space. However,the alkali diagenetic environment can also become the dominant diagenetic environment in certain situation. Alkali diagenesis emphasizes the study on diagenetic environment and its influences on reservoir. It can provide a new thought for assessment and prediction of reservoir,and also provide new interpretations for related geological questions. Some areas (such as Bonan Sag) and formations may develop alkali diagenesis in Jiyang Depression,so it is necessary to do advanced research.