上海周边海域潜在的浅层气灾害及其防治措施

由研究结果认为上海周边海域浅部地层中的浅层气为生物成因气。在上述海域，已发现多处埋藏浅层气，并已在近岸海洋开发工程中诱发了数起地质灾害事故。提出了浅层气灾害诱发的3个原因及2种表现类型，认为防治浅层气地质灾害可从沉积环境、沉积相，沉积地层对含气层进行预测，并采用物探技术调查测区浅层气埋藏深度，进行钻孔预放气是最根本的防治措施。

The potential shallow gas disasters and its prevention measures surrounding Shanghai sea

After studying the cause of the shallow gas, this paper thought that the shallow gas surrounding Shanghai sea area was biogenic origin. In these sea area, the shallow gas buried has been found, and that had in duced several geological disasters and accidents in the inshore marine engineering. This article presents three causes and two types evoked shallow gas disaster. To prevent and cure the geological disasters of the shallow gas, it is essential to forecast strata containing gas from depositional environment, sedimentary facies and sedimentary strata, and to research the depth of shallow gas by means of geophysical and technical surveys measured. Therefore, this pre - gas drilling is the most fundamental prevention and cure measures.