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变质岩潜山油气藏中地球物理特征分析是研究裂缝储层的前提,可靠而有效地综合利用测井资料与地震资料识别裂缝发育带不仅为变质岩油藏提供技术指导,还为该类油田高效勘探开发奠定基础.变质岩潜山储层内幕油气富集程度与裂缝发育密度直接相关,裂缝发育状况的不同致使双侧向、声波时差等表现出较为明显的差异性;高产井地震波场特征错断而杂乱,低产井则表现为强的连续反射轴;地震属性波阻抗差异性也较大,低阻抗的高产井与高阻抗的干井能较为明显区分.利用测井曲线的敏感性拟合裂缝特征曲线,采用绝对阻抗的量化差异勾画研究区裂缝发育带,对该类油气藏勘探及开发具有借鉴意义.
The analysis of geophysical characteristics in metamorphic buried hill reservoirs is a prerequisite for the study of fractured reservoirs. The comprehensive and reliable utilization of well logging and seismic data to identify fractured zones not only provides technical guidance for metamorphic rock reservoirs, And lay a foundation for efficient exploration and development.The concentration of oil and gas inside the metamorphic rock buried hill reservoir is directly related to the density of fracture development.Differences in the development of fractures lead to significant differences in bilateral laterals and acoustic time lags.The characteristics of seismic wave field Fault and disorder, while low-yielding well behaves as strong continuous reflection axis.Seismic attribute wave impedance is also quite different, and the low-impedance high-yield wells and high-impedance dry wells can be more clearly distinguished.Using the sensitivity of the logging curve Combined with the characteristic curve of the fracture, the quantitative analysis of the absolute impedance is used to characterize the zone of fracture development in the study area, which is of reference significance to the exploration and development of such a reservoir.