烃类生成、压实作用，蒙脱石脱水，水热增压及地层的封闭性是产生高压油气藏的主要原因。
The major causes of abnormally high pressure oil-gas pools are hydrocarbon generation, under compaction, montmorillonite dehydration, hydrothermal-pressure increasing and sealing.
控制异常高压形成的因素主要有欠压实作用、黏土矿物脱水、烃类生成及水热增压。
The factors that control the development of the abnormal pressure are uncompaction, clay mineral dewatering, hydrocarbon forming and aquathermal pressure boost.
蒙脱石在地层压实过程中所发生的脱水作用，造成层间水释出，需纳入到地面沉降量的计算范围之内。
In the compression process, it is necessary that the released interlayer water of montmorillonite resulting from dehydration should be added to the calculation of land subsidence amount.
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