8第 2017年8月
文章编号：10013873(2017)04047705
新疆石油地质
XINJIANG PETROLEUM CEOLOGY DOI:10.7657/XJPG20170417
一种新的曲流河点坝砂体侧积层建模方法
以孤东油田七区西Ng52+3层系为例
孙红霞1.2赵玉杰”，姚军
Vol. 38.No.4 Aug.2017
（1.中国石油大学石油工程学院，山东青岛266580；2.中国石化胜利油田分公司勘探开发研究院，山东东营257015）摘要：函流河点坝砂体侧积层是控制剩余油分布的重要因素，建立侧积层构型模型有助于深化对特高含水期剩余油分市认识。为此，分析了等效加密正交网格模型与侧积层约束下的倾斜网格模型的优缺点后，确定了点坝砂体侧积层建模的技术关健，针对性地提出了构造界面约束下的点坝砂体侧积层构型网格模型构建方法，在覆东油田七区西Ng5层系构型解剖成果和井网形式的基础上，提出了非均质构型属性模型构建方法，建立了Ng5"层系点坝砂体构型模型。取心并含油他和度测试资料验证，基于该方法建立的构型模型可以较好地描述侧积层遵描下的局部富集剩余油，使得剩余油描速精度更高。
关键调：张东油田；曲流河；点坝；侧积层；构型；建模；剩余油分布
中图分类号：TE319
文献标识码：A
A New Modeling Method of Lateral Accretion Layers in Sandbodies of Meandering River Point
Bars : A Case Study from Ng52+3Layer of Western District 7 in Gudong Oilfield
SUN Hongxia'2, ZHAO Yujie', YAO Jun'
(1.School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China;
2.Exploration and Development Research Institute, Shengli Oilfield Company, Sinopec, Dongying, Shandong 257015, China)
Abstract: The lateral accretion layer in the sandbodies of meandering river point bars is the main factor controlling remaining oil distribu-tion, and the modeling of the lateral aceretion layer will be helpful for deepening the understanding of remaining oil distribution in ultra-high water cut stage. Based on the analysis of the pros and cons of equivalent-privacy orthogonal grid model and inclined grid model con-strained by lateral accretion layer, the key modeling technology of lateral accretion layer in the sandbodies of point bars is obtained, and a new method of modeling intermal architecture of point bars under the constraint of structural surfaces is pul forward. Based on the dissec-tion results and well pattems of Ng52*3 in westem District 7 of Gudong oilfield, a modeling method for heterogeneous architectures is pre-sented and a model is established for the sandbodies in point bars in Ng5$+3 layer. The oil saturation test data obtained from sealed core analysis verifies that the model can well describe the locally enriched remaining oil sheltered by the lateral accretion layer and the more ac-curate remaining oil distribution can be gained.
Keywords: Gudong oilfield; meandering river; point bar, lateral accretion layer; architecture; modeling; remaining oil distribution
储集层构型是指不同级次储集层构成单元的形态、规模、方向及其叠置关系"。储集层构型研究的最终目的是准确表征储集层的内部结构，深化剩余油分布认识。随着中外学者对储集层构型研究的不断深人，曲流河储集层构型研究已经深人到点坝砂体内部的侧积层2-"。点坝砂体物理模拟及数值模拟研究均表明，内部侧积层对流体渗流、剩余油的遮挡作用不可忽视9-12]。为了指导特高含水期剩余油挖潜，需要建立反映侧积层的精细构型模型，开展数值模拟分析，深化三级构型约束下的剩余油分布认识。在曲流河储集层构型建模的3个级次中，河道和点坝级次的构型建模方法相对成熟，而对点坝砂体内部侧积层的建模仍处于探索阶段13-13。基于目前地质建模中广
收稿目期：2016-10-09
修订日期：2017-05-16
泛使用的Petrel软件，结合数值模拟手段，通过对比正交网格模型与倾斜网格模型描述曲流河点坝砂体侧积层的优缺点，分析侧积层构型建模的技术关键，提出了一种新的点坝砂体侧积层构型建模方法，分别建立构型网格模型及属性模型，实现了储集层建筑结构及砂体内部非均质性的精细表征，并在孤东油田七区
西Ng52*层系曲流河储集层进行了现场应用。 1点坝砂体侧积层建模技术关键
曲流河点坝砂体侧积层建模方法主要有2种：一种是基于笛卡尔坐标系建立正交网格模型，针对厚度较薄的侧积层区域进行嵌人式网格加密，等效表征侧积层展布（以下简称正交网格模型)；另一种是建立断
作者简介：孙红霞（1983-），女，山东东营人，刷研究员，油气田开发.（Tel)13854690316(E-mail)shx316@163.com 万方数据