朝阳沟油田杨大城子油层杨二段致密薄砂岩的识别与预测  

Identification and prediction of tight thin sandstone in Yang-2 Member of Yangdachengzi reservoir in Chaoyanggou oilfield

作　　者：张金宝 杨威 马继升 吴勇[3] 王旭旭 周路[3] 李广兴 ZHANG Jinbao;YANG Wei;MA Jisheng;WU Yong;WANG Xuxu;ZHOU Lu;LI Guangxing(Exploration Department of PetroChina Daqing Oilfield Co Ltd,Daqing 163453,China;No.10 Oil Production Company of PetroChina Daqing Oilfield Co Ltd,Daqing 166405,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中国石油大庆油田有限责任公司勘探事业部,黑龙江大庆163453 [2]中国石油大庆油田有限责任公司第十采油厂,黑龙江大庆166405 [3]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《大庆石油地质与开发》2023年第6期122-131,共10页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“典型盆地深层油气输导格架建立与油气成藏分析”(2017ZX05008-004-008)。

摘　　要：朝阳沟油田杨大城子油层杨二段致密砂岩储层具有单层厚度薄、横向变化快的特点。为明确砂体展布特征,采用基于波形相控的波形指示模拟地震储层预测方法,在储层敏感参数模拟反演的基础上,实现致密薄砂层高精度识别与预测。结果表明:自然伽马波形指示模拟结果具有较高的纵、横向分辨率,薄砂层的厚度识别精度可达到3 m,反演结果与井下钻遇砂体符合率为87.1%,能有效反映了薄砂层空间展布特征,实现薄砂层空间分布预测;杨大城子油层杨二段砂体发育受沉积微古地貌的起伏形态控制,杨二下段砂体分布特征与沉积微地貌具有良好的匹配关系,砂体分布广泛且厚度较大,杨二上段砂体分布特征不受沉积微地貌控制,砂体发育较差且厚度明显减薄。研究成果对杨大城子油层致密薄砂岩的预测提供了有力支撑,同时对类似地质条件的地区及目标层段具有借鉴和指导意义。Tight sandstone reservoirs of Yang-2 Member of Yangdachengzi reservoir in Chaoyanggou oilfield is characterized by thin single-layers and rapid lateral change.In order to clarify sand body distribution characteristics,reservoir prediction method of seismic waveform indication simulation based on waveform phase control is adopted to realize high-accuracy identification and prediction of tight thin sandstone layers on the basis of reservoir sensitive parameters simulating inversion.The results show that waveform indication simulation results of gamma-ray(qAPI)have high vertical and horizontal resolution,with identification accuracy of 3 m for thin sandstone layers.Coincidence rate of inversion results is 87.1%with downhole drilling sand bodies,effectively reflecting spatial distribution characteristics of thin sandstone layers.Sand body development of Yang-2 Member in Yangdachengzi reservoir is controlled by the relief of sedimentary micro-paleogeomorphology.Distribution characteristics of sand bodies in lower Yang-2 Member have good matching relationship with sedimentary micro-paleogeomorphology,and sand bodies are widely distributed with large thickness.Distribution characteristics of sand bodies in upper Yang-2 Member is not controlled by sedimentary micro-paleogeomorphology,and sand body development is poor with obviously thinning.This method provides support for the prediction of tight thin sandstone in Yangdachengzi reservoir,and provides reference and guiding significance for areas and target intervals with similar geological conditions.

关 键 词：波形指示模拟 非阻抗敏感参数 致密砂岩预测 杨大城子油层 朝阳沟油田 

分 类 号：P631[天文地球—地质矿产勘探]