异常高压油气藏概论

异常高压是构成盆地区域流体势场的一种重要动力来源,是源控论中油气藏呈环状分布的重要原因。所以认识异常高压的起因具有特殊重要的意义。鲍格达诺夫M．M．(1989)认为,在深部油气富集和保存的特殊地质-地球化学条件中,最重要的是异常高压．但他仅仅认识到异常高压可以抑制有机质的成熟作用,使烃源岩成熟度明显降低,从而扩大了液态生油窗的深度区间．异常高压油气藏的形成应具有更深刻的原因和更明确的勘探意义．剖析以往文献对异常高压油气藏提出的各种成因机制,得出异常高压油气藏的成因源于深部流体供给的结论．

A GENERAL REVIEW OF ABNORMAL SUPERPRESSURE RESERVOIRS

Abnormal superpressure is presented as an important dynamic source to compose regional fluids potential field in sedimentary basin and an important factor to the ringed distribution of hydrocarbon reservoirs according to the theory of source rock controlling. Therefore, to understand the origin of abnormal superpressure has special significance. By I3or~aaoa M. M., abnormal superpressure is considered to be the most important factor in special geological and geochemical conditions for deep hydrocarbon accumulation and preservation. But his knowledge was limited in the effect of superpressure to restrain organic maturation, to evidently reduce source rock maturation, and thereby to enlarge the depth interval of liquid oil generating window. The formation of abnormal superpressure reservoir should have more profound geological genesis and more explicit exploration significance. Different formation mechanism of abnormal superpressure reservoirs in historical literatures are analyzed in this paper, and a conclusion is reached that abnormal superpressure reservoirs are resulted from fluids in the earth interior.