paleogeothermal gradient meaning in English

古地温梯度

According to those analysis and the background of geological evolution of basin , the kind of hydrodynamics was regarded as compaction before y3 and then as compaction - osmosis after y3 . futhermore , the key time of oil and gas reservoir formation was summarized , it is furthermore , the main cause of high pressure formation was believed that the compaction was not enough in paleogeothermal gradient , meanwhile , analyzing the cause of the low pressure nowadays , it was the uplift and erosion of stratum or pressure divulgence because of seal and so on
另外，还确定油气成藏的关键时期为伊敏组沉积末。再者，认为欠压实是最大埋深状态下，超压形成的主要原因，同时分析了形成现今负(低)压的原因，其原因为地层抬升剥蚀、压力因封闭层的泄漏等。最后，恢复出各主要目的层的古流体势的演化历史，从伊敏组末至现今，油势分布特征具有较好的继承性。