东营凹陷北部砂砾岩储层描述方法

Characterization of glutenite reservoirs in the northern Dongying sag

1. 中国地质大学，湖北武汉430074;2. 胜利油田物探研究院，山东东营257100

1. China University of Geosciences, Wuhan 430074, China;2. Geophysical Prospecting Research Institute of Shengli Oilfield Limited Company, Dongying 257100, China

东营凹陷北部陡坡带是砂砾岩体发育地区。断层的活动使砂砾岩体构造复杂,储层非均质性突出,增加了储层描述和预测的难度。利用钻井、测井及地震等方法综合研究砂砾岩储层的发育规律;结合测井约束反演技术,以测井分析为基础,提出了基于自然电位重构声波和实测声波两次反演,联合进行储层预测的方法,不但提高了测井约束反演的精度,而且大大地提高了砂体的分辨率,解决了灰质泥岩速度接近砂岩速度时对单砂体描述的地质难题。利用反演波阻抗资料对砂砾岩体进行描述及预测,提高了钻探成功率。

The actic region of northern Dongying sag is rich in glutenite. The structural complexity of glutenite body and reservoir heterogeneity caused by fault activities impedes prediction and characterization of reservoirs. With comprehensive investigations of glutenite reservoirs on drilling, logging, and seismic data, the author pro poses a reservoir prediction method based on log-constrained inversion technique. The method can greatly improve the resolution of sand body, and overcome difficulties in characterization of single sand body when the velocity of calcareous shale is close to that of sandstone. Drilling success rate is improved after application of the resulted wave impedance data in the characterization and prediction of glutenite body.