塔河油田合成地震记录的制作及应用

The construction of synthetic seismogram and its application in Tahe Oilfield

中国石化西北分公司勘探开发规划设计研究院,新疆乌鲁木齐 830011

Institute of Petroleum Exploration, Exploitation, Design and Planning, SINOPEC Northwest Petroleum Exploration and Production Company, Urum-chi 830011, China

制作合成地震记录的方法和技术虽然已很成熟,但因各油田的油藏类型和地震地质条件各不相同,因此制作合成地震记录的技巧以及采用的措施有着各自的特点,不能一成不变。合成地震记录能否真正反映层位信息,对储层的精细解释和油气的准确预测非常重要。针对合成地震记录制作方法的改进和完善这一问题,根据塔河油田实际地质情况,从基准面校正、声波时差校正、深时转换精度、井旁地震资料提取子波等几个方面进行了讨论。在塔河地区油藏描述中,利用人机交互对比解释方法,制作了百余口井的合成地震记录,并用于地质层位的标定,获得了较好的效果。

Though synthetic seismogram construction technique is mature, great attention still needs to be paid on the specific method used to build synthetic seismo-grams in areas of various seismic and geologic settings and for different types of oil-gas reservoir. Taking the geology in Tahe Oilfield into account, this paper discusses issues related to construction of synthetic seismogram, such as datum correction, interval transit time correction, precision of depth-time conversion, wavelet extraction from traces nearby wells. For the reservoir characterization in Tahe Oilfield, we have constructed synthetic seismograms over more than one hundred wells interactively on workstations. Satisfactory results have been achieved by applying the synthetic seismograms in the calibration of geologic horizon.