四川盆地磨溪地区雷一~1亚段气藏开发中后期高精度数值模拟  

High-accuracy numerical simulation on middle to late development stage of T2l11 gas reservoirs, Moxi gasfield, Sichuan Basin

作　　者：甘笑非 欧家强[1] 蔡珺君 阮基富[1] 袁权[1] 刘博文[1] Gan Xiaofei;Ou Jiaqiang;Cai Junjun;Ruan Jifu;Yuan Quan;Liu Bowen(Central Sichuan Oil and Gas District,PetroChina Southwest Oil&Gasfield Company,Suining,Sichuan 629000,China)

机构地区：[1]中国石油西南油气田分公司川中油气矿

出　　处：《天然气勘探与开发》2019年第3期101-108,共8页Natural Gas Exploration and Development

基　　金：中国石油西南油气田分公司科研计划项目“磨溪雷一1气藏提高采收率技术研究”(编号:20180303-07)

摘　　要：四川盆地磨溪地区雷一^1亚段气藏持续稳产达24年,开发效果好。进入开发中后期以来,磨溪雷一^1亚段气藏地层压力、剩余储量分布、产水规律认识不清,影响气藏下步开发调整对策的制定;传统数值模拟研究受制于粗化过程,无法实现对气藏非均质性的精细描述,计算精度不高。因此,通过开展基于高精度数值模拟技术的气藏描述,研究结果表明:①应用高精度数值模拟器,免去地质模型粗化过程,网格数量规模达到千万数量级,保证模型地质属性的高精度刻画;②采用三维地质建模与高精度数值模拟一体化技术,地质建模与数值模拟工作交互进行,历史拟合调参需符合地质认识;③修正后的模型更加逼近气藏实体,实现对气藏开发中后期压力分布、剩余储量分布规律的精细刻画以及气井产水较为准确的描述和预测。In Moxi gasfield,Sichuan Basin,T2l11 gas reservoirs maintain stable production for more than 24 years,showing a better development effect.So,this field has been honored as an “efficiently developed one” for 3 times by PetroChina.Since entering its middle to late development stage,the reservoir pressure,remaining reserve distribution,and water production laws have not been made clearly,so as to affect to make many countermeasures against following development adjustment.Restricted by upscaling process, some traditional numerical simulation cannot precisely depict reservoir heterogeneity,and its calculation accuracy is low.Therefore, this study adopted one technology of numerical simulation with high accuracy to carry out reservoir description.Results show that (1) by virtue of this high-accuracy simulator,the upscaling process of geological model is eliminated and grid number is on the order of ten million,so as to guarantee high-accuracy depicting attributes;(2) when its integration to another technology of 3D geological modeling,this modeling and reservoir simulation are carried out interactively,and parameter adjustment for history match shall also be in coincidence with geological understandings;and (3) the modified model can reflect actual reservoirs more accurately,characterize precisely pressure distribution and remaining reserve distribution during middle to late development,and predict water production from gas wells more exactly.

关 键 词：四川盆地 磨溪雷一^1亚段气藏 数值模拟 气藏描述 地层压力 剩余储量分布 产水预测 

分 类 号：TE319[石油与天然气工程—油气田开发工程]