天津新生界固结特征与地面沉降

本文通过对大量的室内试验和大港油田测井资料的分析和总结,从地层的固结状态和固结阶段两个方面系统分析了天津地区新生界固结特征与地面沉降的关系,认为:天津新生界地层在原始应力状态下,除滨海地区第一海相地层和坳陷区局部2500m以下地层为欠固结状态外,其余基本为正常固结;但在地下水长期超采区,长期超采的含水组地层为超固结状态。1000m以浅的地层处于初期压实阶段,仍会有较多的孔隙水被排除,而导致比较明显的地面沉降。

Cenozoic consolidation characteristics and land subsidence in Tianjin

According to the survey data of oil wells in Da-gang oil field and a lot of laboratory data,the paper discussed the relationship between the consolidation characteristics in Teriany system and land subsidence in Tianjin.It was considered that the Teriany system in Tianjin reached a normally consolidated state,except the stratas deeper than 2500 metres in down-warping region and the first sea-facies strata in Binhai area.And the water-bearing stratas with long-term over-exploitation had been in an over conso...