春光探区强反射背景下的薄储集层预测  

Thin Reservoir Prediction Under Strong Reflection Shielding Background in Chunguang Area

作　　者：谢启 李恒权[1] 李磊[1] 张新超[1] 郭佳玉 杨星星 贾秀容[1] XIE Qi;LI Hengquan;LI Lei;ZHANG Xinchao;GUO Jiayu;YANG Xingxing;JIA Xiurong(Research Institute of Exploration and Development,Henan Oilfield Company,Sinopec,Zhengzhou,Henan 450018,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,郑州450018

出　　处：《新疆石油地质》2021年第5期617-623,共7页Xinjiang Petroleum Geology

基　　金：中国石化科技攻关项目(P19016-2)。

摘　　要：春光探区石炭系具有地震强反射特征,其上垂向距离较近的白垩系储集层厚度小且侧向叠置,白垩系薄储集层的地震响应完全屏蔽在石炭系强反射内。利用分离薄储集层正演分析,获得声波时差曲线及自然伽马曲线的优势频率,构建拟波阻抗曲线,垂向上提高识别储集层能力;横向上运用地震波形指示反演,预测被强反射屏蔽的薄储集层的平面展布范围。识别了12个岩性圈闭,部署预探井和评价井各1口,均获得工业油气流。能够有效预测强反射背景下的薄储集层,为其他复杂背景下薄储集层的预测提供借鉴。In the Chunguang exploration area,the Carboniferous strata show strong seismic reflections,while the Cretaceous reservoir above and vertically close to Carboniferous is thin and laterally superposed,and completely shielded by the strong reflections from the Car⁃boniferous.Vertically,we used forward modelling to get the dominant frequencies of AC and GR curves,and reconstructed the acoustic im⁃pedance curve to improve reservoir identification effects.Horizontally,the distribution of thin reservoirs shielded by strong reflections is predicted using high⁃resolution seismic inversion with waveform indication.Twelve lithologic traps has been identified,and commercial oil and gas flows have been obtained from one preliminary exploration well and one evaluation well.It has been proved that the technology can effectively predict thin reservoirs shielded by strong reflections,and it is also of great significance for predicting thin reservoirs on other similar complex background.

关 键 词：春光探区 强反射 地震正演 敏感性分析 曲线构建 地震反演 薄储集层预测 

分 类 号：P631[天文地球—地质矿产勘探]