珠江口盆地惠州地区珠江组砂体上倾尖灭的地质-地球物理“逐级预测”方法  

Geological-Geophysical “Gradual Prediction”Method for Up-dip Pinch-out Sandstone of Zhujiang Formation,Huizhou Area,Pearl River Estuary Basin

作　　者：芮志锋 林畅松[1] 郭佳 杜家元 丁琳 李潇 RUI Zhifeng;LIN Changsong;GUO Jia;DU Jiayuan;DING Lin;LI Xiao(School of Energy Resources,China University of Geosciences,Beijing 100083,China;CNOOC Research Institute,Beijing 100028,China;Shenzhen Branch,CNOOC,Shenzhen,Guangdong 518000,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中海油研究总院,北京100028 [3]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《现代地质》2019年第6期1229-1240,共12页Geoscience

基　　金：国家自然科学基金重点项目“南海北部新近纪陆架坡折的发育演化及其对南海盆地动力学过程的沉积响应”(91328201)

摘　　要：砂体上倾尖灭油气藏是岩性油气藏中重要类型之一,砂体上倾尖灭的刻画与描述是上倾尖灭圈闭有效性评价的关键。在以三角洲前缘沉积为主构成的三级层序内,三角洲沉积相关砂体上倾尖灭的地质-地球物理"逐级预测"描述方法对于认识上倾尖灭油气藏分布规律及其油气勘探具有重要意义。该方法由5个部分组成:在三级层序识别的基础上,运用高精度层序地层划分技术建立了四级层序构成的高频层序地层格架;在高频层序约束下,利用地震沉积学技术描述沉积相的平面分布;在地质模型指导下,利用频谱成像技术定性确定尖灭带的分布;利用相控储层反演半定量、定量预测砂体尖灭线;根据不同成因砂体的沉积特点,利用正演模拟技术开展尖灭线的外推预测。Up-dip pinch-out sandstone reservoir is an important rock reservoir type,and its characterization and description is a key to evaluate up-dip pinch-out traps. Within the third-order sequence,which is mainly composed of deltaic front deposition,the geological-geophysical "gradual prediction"method( to describe the updip pinch-out deltaic sand-bodies) has great significance to delineate and explore up-dip pinch-out sandstone reservoirs. This method consists of five parts:( 1) Based on third-level sequence identification,high resolution sequence stratigraphic division technology is used to establish the high-resolution( fourth-order) sequence stratigraphic framework;( 2) Use seismic sedimentologic technology to describe the planar sedimentary facies distributions under high-frequency sequences;( 3) Based on geological models,spectral imaging technique is used to delineate the distributions of the pinch-out zone;( 4) Facies-controlled reservoir inversion is conducted to( semi)-quantitatively delineate the sand-body pinch-out line;( 5) According to different sedimentary characteristics of sand-bodies,a forward modelling is performed to extrapolate the pinch-out lines.

关 键 词：砂体上倾尖灭 高精度层序地层 地震沉积学 频谱成像 相控储层反演 正演模拟 

分 类 号：TE122[石油与天然气工程—油气勘探]