储层预测技术在东濮凹陷前8地区的应用

The application of reservoir prediction technologies in Qian 8 area of Dongpu depression

1. 中国石化中原油田勘探开发科学研究院,河南濮阳 457001;2. 中国地质大学,北京100083

Exploration and Development Science Institute of Zhongyuan Oilfield, Puvang 457001, China

针对东濮凹陷前8地区油气藏勘探程度高,断块小、埋藏深、储层薄的特点,在综合分析地震、测井及地质资料的基础上,确定了适合本地区的储层预测方法。该方法的工作原理是,①在目的层附近提取子波,调整井旁地震层位和测井分层,制作合成记录,进行层位标定;②对地震层位进行加密,追踪出砂层组,然后利用这些层位和断层数据体建立地震框架地质模型;③利用测井资料和地震数据体进行波阻抗反演,建立砂岩厚度与波阻抗的统计关系,将地震属性转换为储层参数。将储层预测成果应用于井位部署,实际钻探结果与储层预测结果较为吻合。

Qian 8 area in Dongpu depression possesses the characteristics of high hydrocarbon exploration degree, small fault block, depth level and thin reservoir formation. Based on these characteristics and wavelet derived from target bed for seismic data body, the corresponding relationship between seismic formation near well and log horizon was adjusted, synthetic record was made, and horizons were marked. To plus new horizons and track out sand layers, geological model has been created with these horizons and fault data body, and impedance inversion with log data and seismic data body was finished on basis of log data standardization and interpreta-tioa This paper also built statistics relationship between sand thickness and impedance, and changed seismic attributes into reservoir parameters. Reservoir prediction provided important basis for the deployment of Qian 8 and Qian 10 wells, and the drilling result matches the prediction.