摘要
90年代以来,随着复杂储层测井技术的发展,井孔应力测量与裂缝探测技术有长足进步,以电测井和成象测井为其代表。近来发现,在西部山前中、新生界与渤海湾、南方等地的古生界复杂构造的压应力带内,其泥岩或致密灰岩的测井电阻率产生数量级的增大响应。在各山前带,异常高电阻率泥岩与其中砂岩的异常孔隙压力相关,油气藏中相对张性应力层段内储层原生孔隙发育,而压应力层段内储层原生孔隙不发育。复杂构造带内碳酸盐岩的裂隙发育带都存在相对张性应力区内。
Along with the development of the logging technologies for complicated reservoirs, a great progress has been achieved in borehole stress measurement and fracture-detecting since 1990, and electric logging and imaging logging are typical ones. In recent, it is discovered that a magnitude of increment response takes place in he logging resistivity of mudstone and compact limestone in the compressive stress zone of Paleozoic complicated structure in the western mountain front, Bohai Bay and South China. In each mountain front, the mudstone with abnormal high resistivity is related to the abnormal pore pressure in sandstone, the primary pores of the reservoir in the intervals with relative extensional stress in oil/gas reservoirs are well developed, but the rimary pores of the reservoir in the intervals with compressional stress is poorly developed. The fracture & pore ones of the carbonate rocks in the complicated structure is always developed in the extensional stress area.
关键词
测井解释
构造应力场
油气藏
油气勘探
logging interpretation, structural stress field, oil/gas reservoir
