鄂尔多斯盆地铁边城地区长2油层组剩余油模拟  

Simulation of Remaining Oil in Chang 2 Member in Tiebiancheng Area,Ordos Basin

作　　者：张晓明 吴勤博 邹焰 王皓立 韩明 郭龙飞 狄晓磊 屈乐[2] ZHANG Xiao-ming;WU Qin-bo;ZOU Yan;WANG Hao-li;HAN Ming;GUO Long-fei;DI Xiao-lei;QU Le(Changqing Oilfield Branch Eighth Oil Production Plant,PetroChina,Xi'an 710069,China;Xi'an Key Laboratory of Tight Oil(Xi'an Shiyou University),Xi'an 710065,China)

机构地区：[1]中国石油长庆油田分公司第八采油厂,西安710069 [2]西安市致密油(页岩油)重点实验室(西安石油大学),西安710065

出　　处：《科学技术与工程》2024年第5期1799-1807,共9页Science Technology and Engineering

基　　金：国家自然科学基金(52004223);陕西省创新能力支撑计划(2022PT-08);陕西省教育厅青年创新团队项目(22JP063)。

摘　　要：为了实现油田增储上产及老井挖潜的目标,提升剩余油资源开发潜力,通过岩心、薄片、电镜、物性、模拟方法系统的研究了鄂尔多斯盆地西北部姬塬油田铁边城地区长2段主力油层的剩余油分布特征。研究显示,长2_(1)^(3-2)和长2_(1)^(3-3)小层为主力产油层,平均厚度分别为12.2 m及11.1 m。目的层砂岩储层的孔隙度通常介于12%~18%,渗透率则通常低于8 mD。根据相控原则,建立了主力产层的物理属性模型及流体模型;进而,开展了剩余油分布数值模拟研究。通过基于实测产水及产油量约束的历史生产曲线拟合,获得了剩余油的纵横向分布结果。研究显示,剩余油分布受砂体边界、物性差异及注采关系的影响。剩余油整体上成片分布;但是,受油藏物性差异的影响,注水多呈不均匀受效,因而造成局部剩余油富集。剩余油主要分布在砂体边界处,这些区域无井网控制,因而水驱程度低,剩余油分布较多。受长期注采的影响,井间会形成高渗区,这些其余类似高速通道,会发生快速水淹,其周边则形成剩余油滞留区。可见,剩余油富集明显受微相、物性、注水及井网因素的控制。How to effectively predict the distribution law of remaining oil resources is an important work to increase the oil field production potential of old wells.Taking the Chang 2 Member of the Tiebiancheng area,Jiyuan oilfield,northwestern Ordos Basin as an example,the remaining oil distribution characteristics of the main reservoir were systematically studied using core,thin section,electron microscope,physical properties and numerical simulation methods.The study shows that the Chang 2^(3-2)_(1)and Chang 2^(3-3)_(1)layers are the main oil-producing formations with average thicknesses of 12.2 m and 11.1 m,respectively.The main oil-producing layers have the porosity range between 12%and 18%and the permeability of less than 8 mD.According to the principle of facies control,the physical property model and fluid model of the main production layers are established.Furthermore,the reservoir numerical simulation was carried out using the ECLIPSE Software.The historical fitting results show that all the production indexes are in good agreement with the actural data,and the simulation results are reliable.The numerical simulation results show that the remaining oil distribution is affected by sand body boundary,physical property difference and injection-production relationship.However,due to the difference of reservoir properties,the effect of water injection is not uniform,resulting in local remaining oil enrichment.The remaining oil is mainly distributed at the boundary of the sand body.There is no well pattern control in these areas,so the degree of water flooding is low and the remaining oil is rich in these areas.As for the areas on both sides of the high permeability zone between injection and production wells,the oil well is flooded quickly and the oil well production decreases rapidly because the injected water breaks out along the high permeability zone between injection and production wells.At the same time,due to the small affected area and uneven water flooding,the areas on both sides of the hyperpermeability zon

关 键 词：鄂尔多斯盆地 长2段 三维模型 数值模拟 剩余油 

分 类 号：P624[天文地球—地质矿产勘探]