断陷湖盆沿层侵入火成岩、湖底扇砂岩体的定量化识别及预测方法-以海拉尔盆地乌尔逊凹陷为例  

Quantitative Identifcation and Prediction of Layered Intrusive Masses and Sublacustrine Fans in Faulted Basins—A Case Study from the Hailar Basin,Eastern China

作　　者：苏玉平[1,2,3] 陈广坡 谢明贤[2] Zhengxi Xueluo Hongliang Su Yuping;Chen guangpo;Xie mingxian;Zheng xi;Xue luo;Hong liang(Northeast Petroleum University,Daqing;PetroChina Research Institute of Petroleum Exploration&Development Northwest(NWGI);CNPC Key Lab of Reservoir Characterization)

机构地区：[1]东北石油大学,大庆163318 [2]中国石油勘探开发研究院西北分院,兰州730020 [3]中国石油油藏描述重点实验室,兰州730020

出　　处：《Applied Geophysics》2023年第4期488-498,671,共12页应用地球物理（英文版）

基　　金：sponsored by the Subordinate subject of the National Major Science and Technology Project“Development of Large Oil and Gas Fields and coalbed methane”(2017ZX05001-003);supported by the National Natural Science Foundation of China”Simulation of Dynamic Process for Shale Oil Sweet Deposition in Lucaogou Formation,Jimusar Sag”(42072119).

摘　　要：沿层侵入火成岩体和湖底扇砂岩体在地震波形上具有类似反射特征,将它们从地震资料中识别区分并实现定量化预测,是断陷湖盆岩性油气藏勘探面临的重大挑战之一。本文以海拉尔盆地乌尔逊凹陷为例,构建了沿层侵入火成岩体和湖底扇砂岩体的地质模型并开展了地震正演模拟,确定上述两种地质体与地震敏感参数高亮体之间的相关关系,建立了定量解释图版,最终实现了两种地质体的定量识别、分布预测。研究发现,高亮体值大于630代表了沿层侵入火成岩的地震响应,小于380即为泥岩,介于二者之间则是湖底扇砂岩体的响应。基于模型正演的高亮体地震属性,可以用于定量区分沿层侵入火成岩和湖底扇砂岩体;实钻证实了预测结果,该方法具有在类似地区推广应用的价值。Layered intrusive masses and sublacustrine fans have similar reflection features on seismic data.Thus,distinguishing them has been a big challenge for lithologic hydrocarbon reservoir exploration in faulted basins.In this study,we took the Hailar Basin as an example to achieve quantitative identifcation and prediction between such two geologic bodies.First,we established geologic models and performed seismic forward modeling to fnd the relationship between the models and the highlighted seismic body(HSB).Then,a quantitative chart was plotted and applied in the study.The research results showed that HSB values greater than 630 represented the response from layered intrusive masses,those less than 380 represented the response from lacustrine mudstone,and the values between the two matched the response from sublacustrine fans.We concluded that the above forward-modeling-based HSB had advantages in distinguishing and predicting layered intrusive masses and sublacustrine fans.The prediction result was proven by subsequent well drilling.The method has popularization and application values in similar geological areas.

关 键 词：沿层侵入火成岩 湖底扇 高亮体 地震属性 岩性油气藏 

分 类 号：P631.4[天文地球—地质矿产勘探] P618.13[天文地球—地质学]