盆地深层流体-岩石作用与油气形成研究前沿

Research Frontiers of Fluid-Rock Interaction and Oil-Gas Formation in Deep-Buried Basins

流体-岩石作用贯穿深层成烃、成储与成藏过程,是一个兼具前沿性和实用性的研究领域。在对含油气盆地流体-岩石作用研究的基础上,本文指出深层裂隙体系发育、流体化学亲和力的增大将显著抵消物性变差对流体活动性的不利影响,因此深层流体活动规模和效应不可低估。综合分析提出:1应加强深层烃水岩条件下残留烃(滞留烃)、固体沥青等生烃及其转化问题研究;2关注深层构造应变/非均匀压缩与储集层构造-流体作用效应、深层溶蚀流体来源/相态与规模储集层改造机制;3重视深层高温高压下储集层物性/润湿性、流体相态及活动性对油气运聚及效率的控制研究。

Fluid-rock interactions could occur through deep processes including hydrocarbon generation, reservoir formation and oil-gas accumulation.The research of such interaction is of both frontier and practical.Based on reviews of the published papers,the author indicates that the scale and role of deep fluid flow should not be underestimated because developed fracture systems and increasing fluid chemical affinity can significantly offset negative effect on fluid flow from decreasing permeability in deep-buried basins.It is presented that,according to the integrated review and analysis in the paper,the following research fields should be paid attention to in the future：（1 ）hydrocarbon generation and transforma-tion of residual/retained hydrocarbon and solid bitumen in deep fluid-rock reaction systems;（2）structural-fluid interac-tions of reservoirs under deep strain/non-uniform compression,mechanism of reservoir modification related to source/phase states of deep-derived dissolving fluids;（3 ）oil-gas migration and accumulation efficiency controlled by reservoir physical properties/wettability and fluid phases and activities under high temperature and high pressure.