摘要
埕北低断阶位于滩海区,区内断裂发育,砂体横向变化大,纵向相互叠置,受浅水地表采集及地下复杂地质条件的影响,常规处理的地震资料品质及储集层预测精度无法满足岩性油气藏叠置储集层的精细预测。为此,开展了滩海地区地震资料的高分辨率处理解释技术研究采用浅水鸣震与混响全频带压制技术压制高频噪音、突出地震数据低频特征,增加地震资料的频宽;应用五维空间重构的半面元化处理技术,增加空间采样率,加强有效信号,提高地震成像精度;以高分辨率地震资料为基础,开展相控地质统计学反演提高储集层预测精度,降低反演的多解性,实现五级层序主力单砂体定量刻画。埕北低断阶沙二段实际应用效果表明,高分辨率处理地震剖面可识别追踪10个五级层序界面,根据相控反演结果可明确3支砂体带空间分布变化,储集层预测符合率85%,可满足该区高分辨率精细预测及储量动用的地质需求。
Chengbei low step fault block lies in the tidal-flat area,within which fault developed,sand body has great lateral variation and overlaps vertically.Affected by shallow water surface acquisition and underground complex geological conditions,the quality of conventionally processed seismic data and the accuracy of reservoir prediction cannot meet the fine prediction of overlapped reservoirs of lithologic reservoirs.To this end,the research on high-resolution processing and interpretation technology of seismic data in tidal-flat area was carried out.Shallow water singing and reverberation full-spectrum band suppression technology was used to suppress high-frequency noise and highlight the low-frequency characteristics of seismic data,increasing the bandwidth of seismic data.Half bin processing technology of five-dimensional spatial reconstruction to increase spatial sampling rate,strengthen effective signals,and improve seismic imaging accuracy.Based on high-resolution seismic data,facies-controlled geostatistics inversion was carried out to improve the accuracy of reservoir prediction,and to achieve quantitative characterization of the main single sand body of five-level sequence.The actual application effect in the Second Member of Shahejie Formation in Chengbei low step fault block showed that high-resolution processed seismic profile can identify and track 10 five-level sequence interfaces.According to the facies-controlled inversion results,the spatial distribution variation of 3 sand body belts can be clearly identified,and the reservoir prediction coincidence rate reached 85%,which can meet the geological needs of high-resolution fine prediction and reserves utilization in the area.
作者
郭淑文
董晓伟
朱伟峰
曾天玖
蒙文
贺照权
王文涛
邢兴
GUO Shuwen;DONG Xiaowei;ZHU Weifeng;ZENG Tianjiu;MENG Wen;HE Zhaoquan;WANG Wentao;XING Xing(Exploration and Development Research Institute of PetroChina Dagang Oilfield Company,Tianjin 300280,China;Dagang Branch of BGP Research Institute,CNPC,Tianjin 300280,China;No.3 Oil Production Plant of PetroChina Dagang Oilfield Company,Tianjin 300280,China)
出处
《录井工程》
2020年第S01期113-119,共7页
Mud Logging Engineering
关键词
高分辨率
浅水多次波
半面元化
相控地质统计学反演
储集层预测
high-resolution
shallow water multiples
half bin
facies-controlled geostatistics inversion
reservoir prediction
