稀疏井网地震分辨率以下复合砂体构型地震检测方法及应用  

Seismic detection method and application of composite sand body architecture below seismic resolution with sparse well spacing

作　　者：张栋 黄旭日[1,2] 范廷恩 尹成 丁峰[1] ZHANG Dong;HUANG XuRi;FAN TingEn;YIN Cheng;DING Feng(School of Geosciences and Technology,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]西南石油大学地球科学与技术学院,成都610500 [2]油气藏地质及开发工程国家重点实验室,西南石油大学,成都610500 [3]中海油研究总院有限责任公司,北京100028

出　　处：《地球物理学报》2022年第12期4874-4886,共13页Chinese Journal of Geophysics

基　　金：国家自然科学基金(U20B2016)资助.

摘　　要：地震沉积学应用于油藏开发地质研究是其在新领域的发展,是以解释井间单成因砂体特征为目的,面向油藏开发的小尺度研究.以往的地震沉积学解释方法,注重于对沉积构型单元的沉积相进行刻画,少有直接对地震垂向分辨率(λ/4)以下的不连续性(构型边界)进行预测.因此,采用地震正演模拟方法讨论了沉积构型单元的地震可识别尺度,通过地质模式约束来降低解释多解性,利用神经网络方法进行了构型单元的地震构型相预测,并利用地震属性进行了次级构型单元的边界预测.研究表明:相比于传统相干体方法,利用地震沉积学方法预测地震垂向分辨率以下沉积单元内部构型的边界具有更高的准确度,结合地震构型相预测结果可实现薄层沉积单元的内部结构识别.The application of seismic sedimentology to the study of reservoir development geology is its development in a new field.It is a small-scale study of reservoir development for the purpose of interpreting the characterization of single genetic sand bodies between wells.Previous interpretation methods of seismic sedimentology focused on depicting the sedimentary facies of sedimentary architecture units,and few directly predicted the discontinuities(architecture boundaries)below the seismic vertical resolution,λ/4.Therefore,we use the seismic forward modeling method to analyze the seismic recognizable scale of sedimentary architecture units,and reduce the multiplicity of interpretation through geological model constraints.We also use neural network method to predict the architecture seismic facies,and use seismic attributes to predict the internal boundary of the architecture units.The results show that the seismic sedimentology method has a higher accuracy for the internal boundary of sedimentary architecture units comparing with the traditional coherent method below the seismic vertical resolution.Thus,we can use the combined method of seismic architecture facies and boundaries to interpret the internal structure of thin-layer sedimentary units.

关 键 词：地震沉积学 储层构型 稀疏井网 地震分辨率 构型边界 

分 类 号：P631[天文地球—地质矿产勘探]