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成岩作用中发生流体浓缩现象,这对地层水水化学性质及油气成藏具有重要影响。通过综合地质资料统计分析,在东营凹陷地层水水化学演化特征及成岩过程矿物蚀变耗水作用研究的基础上,对研究区成岩耗水系统进行界定,明确了地层水水化学在垂向上明显存在3个特征区带,即浅部1100m以上开放的外循环地下水系统,中部1100～2100m过渡带的复合循环地下水系统,深部2100m以下封闭的内循环地下水系统。耗水区间基本处于封闭水系统环境中,其中有效耗水区间为2100～3500m。
Fluid concentration occurs during diagenesis, which has an important influence on formation water hydrochemical properties and hydrocarbon accumulation. Based on the statistical analysis of geologic data, the hydrochemical evolution characteristics of formation water in Dongying sag and the mineralization alteration and water consumption in diagenesis are studied, and the diagenetic water consumption system in the study area is defined. It is clarified that the hydrochemical of formation water is obviously vertical There are three characteristic zones, that is, an open-loop groundwater system with a shallow opening of 1100m or more, a compound cycle groundwater system with a transition zone of 1100 to 2100m in the middle, and an internal circulation groundwater system with a depth of 2100m or less. The water consumption interval is basically in a closed water system environment, of which the effective water consumption interval is 2100 ~ 3500m.