沉积盆地热流体活动及其成藏动力学意义

摘要

Based on the analysis and some typical data of petroleum basins in China and world, it discusses some important expression forms and majo r research methods of thermal fluid flow, and emphasized its enhancement to orga nic-matter maturation and hydrocarbon generation in this paper. According to t he major controlling factor, passage of fluid migration, to thermal fluid flow, it divides thermal fluid flow into four types: (1)lithologic-type, (2)conformity -t ype, (3)fault-type and (4) compound-type. Finally, it also discusses the sign ifi cance of thermal fluid flow to pool-forming dynamics：(1)provides a new ex planation way to abnormal vitrinite reflectance, which can enlarge the fields of hydrocarbon exploration and development; (2)provides some important evidences to research of hydrocarbon migration, which support to choose exploration targ e ts; and (3)provides means to study diagnesis and porosity evolution of reservo ir rocks, which can be used to predict the development units of deep reservoir s.%在分析、总结国内外一些含油气盆地的典型资料的基础上，论述了热流体活动的若干重要表现形式及主要研究方法，强调了热流体活动对有机质热演化和油气生成的强化作用。根据控制热流体活动的主要因素之一--流体活动通道，将沉积盆地内的热流体活动类型划分为岩性型、不整合型、断裂型和复合型四大类。最后，探讨了热流体活动对成藏动力学研究的重要意义，认为其可为有机质演化异常提供新的成因解释途径，扩大油气勘探领域；为油气运移的研究提供线索，优化勘探目标选择；为成岩-孔隙演化的动态研究提供依据，预测深部储层发育层段。