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上倾尖灭型油气藏是岩性油气藏的基本类型之一.对上倾尖灭砂体的识别是岩性油气藏勘探的任务之一.在对比单一利用地震资料、地震属性和波阻抗反演等方法进行砂体识别的优缺点后,提出运用波阻抗和瞬时相位相叠合的新方法对砂体进行识别.运用此方法,对万昌地区水下滑塌扇内部上倾尖灭砂体进行了精细解释和分析.得出以下结论:(1)通过钻井岩心识别沉积相类型,结合均方根振幅属性和同沉积断层分布情况,可以准确地确定伊通盆地万昌地区永二段水下滑塌扇的分布范围;(2)用波阻抗和瞬时相位属性联合的方法对水下滑塌扇内部上倾尖灭砂体进行识别取得了较好的效果,万昌地区WC1井附近水下滑塌扇内至少有两期最具油气勘探价值的上倾尖灭砂体.
Up-pinch out-type reservoirs are one of the basic types of lithologic reservoirs.It is one of the tasks of lithologic reservoirs exploration to recognize the updip pinch-out reservoirs.Based on the comparison of single seismic data, seismic attributes and wave impedance Inversion and other methods to identify the advantages and disadvantages of sand body, we propose to use the new method of wave impedance and instantaneous phase superimposition of the sand body to identify.Using this method, Wanchang area underwater slipped fan within the decore (1) Recognition of sedimentary facies types by drilling core, combined with the properties of root mean square amplitude and the distribution of the same sedimentary fault, can accurately determine the Yong 2 section of Wanchang area in Yitong Basin (2) The combined effect of wave impedance and instantaneous phase attributes has been used to identify the updip pinded sand bodies in underwater slip fans, and the results show that water wets near WC1 well in Wanchang area There are at least two upslope pinnacles in the collapsed fan that have the most potential for oil and gas exploration.