变质岩潜山内幕裂缝表征及储层预测研究

Research of metamorphic buried hill fracture characterization and reservoir prediction

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.

Geophysical characteristics research of metamorphic buried hill reservoir is a prerequisite for fractured reservoir. Reliable and effective utilization log data and seismic data to identify fracture zones not only provide technical guidance for the reservoir rocks, but also for the field efficient exploration and development foundation. Metamorphic Buried Hill Reservoir insider hydrocarbon enrichment directly related to the fracture density, different fractures situation causes both sides logging and acoustic time to show obvious differences. Seismic wave field characteristics of high-yield wells is intermittent and messy, but stripper wells is shown as a continuous strong reflection axis. Seismic attribute impedance differences are large, high-yield wells with low impedance and high impedance of dry wells can be more clearly differentiated. Log Curve Fitting crack sensitivity characteristic curve, quantify the difference of absolute impedance outlined fracture zone in the study area, with a reference to the class reservoir exploration and development.