复杂超深低渗碎屑岩储层预测方法研究及应用

Research and application of reserve forecasting techniques of complex ultra-deep low-permeability clastic reservoir

袁云福 郭素华

Yuan Yunfu Guo Suhua

中国石化 西北油田分公司,乌鲁木齐 830011 2. 中国石化 西北油田分公司 勘探开发研究院,乌鲁木齐 830011

SINOPEC Northwest Company,Urumqi,Xinjiang 830011,China 2. Research Institute of Petroleum Exploration & Production,SINOPEC Northwest Company,Urumqi,Xinjiang 830011,China

塔河3区石炭系储层为一套浅海—滨海相碎屑岩沉积层系,具有埋藏深、单砂体薄、砂体分布不稳定等特点。地震资料主频率范围为35~41Hz,计算卡拉沙依组对应反射层砂岩的主体理论分辨率为26~32m,而目的层段单层砂体厚度最大不超过12m,多数为2~6m,常规地震数据无法识别。为了解决卡拉沙依组薄砂体预测与解释的难题,采用了振幅切片演化、地震数据提频处理、地震数据分频处理、阻抗反演、储层地震敏感参数高分辨率反演等方法和技术手段,通过效果分析和对比,确定合理的储层预测方案,总结出一套以储层敏感参数高分辨率反演为主导的砂泥岩薄互层综合储层预测技术,对当前勘探开发中面临的复杂超深低渗砂泥岩薄互层储层研究具有一定的针对性和适用性。

The Carboniferous reservoir in the 3rd block of the Tahe Oil Field is a set of shallow-water andoffshore facies elastic precipitation,characterized by deep burial depth,thin sand body and unstable sanddistribution.The major frequency of seismic data ranged from 35 to 41 Hz,thus the resolution of C1k1WLS about 26-32 m.However,the maximum depth of sand body was 12 m,USUally 2-6 m,making itdifficult to identify sand body with normal seismic data.In order to solve the problems in C1k1 thin sandbody prediction and identification,several methods and techniques were used,such as amplitude chip-ping evolution,high-frequency seismic tomography,seismic data separate frequency processing,impe-dance inversion and reservoir seismic sensible factor high definition inversion.Through effect analysisand comparison,a set of reserve prediction method was proposed.Reservoir sensible factor high-defini-tion inversion was chosen to deal with sandstone and mudstone thin alternating layers.The methodmight be helpful for studies of complex ultra-deep low-permeability elastic reservoirs.

https://doi.org/10.11781/sysydz2011S1112