油气藏保存条件是构造变动比较强烈地区油气勘探的关键。
The reservoir preservation conditions are the key of the hydrocarbon exploration in stronger structural dislocation area.
判断油气藏保存条件的优劣，除了盖层和断层封闭性之外，还有油气水的化学特征，如地层水的交替或油气散失。
Conditions of hydrocarbon accumulation and preservation in reservoirs behave in chemistry of formation water besides sealing of caps and faults.
利用地表油气化探资料可以较准确地判断油气藏保存条件的好坏，尤其对于已存在过又遭后期破坏的泄漏油气藏。
By using data of surface geochemical exploration, it is quite accurate to evaluate the conditions of saving oil gas fields especially for those leaking ones owing to be destroyed in last period.
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