数值模拟技术定量评价固井质量对底水气藏开发的影响  

Effects of cementing quality on the development of bottom-water gas reservoirs evaluated by numerical simulation

作　　者：周小涪 鲁瑞彬 林怡菲 ZHOU Xiaofu;LU Ruibin;LIN Yifei(CNOOC Zhanjiang Company,Zhanjiang,Guangdong 524057,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《天然气勘探与开发》2024年第1期40-45,共6页Natural Gas Exploration and Development

摘　　要：为了评价固井质量对底水气藏开发的影响,以南海西部某多层底水气藏合采井为研究对象,通过应用渗流与管流相统一的原理建立等效网格定量表征固井质量的评价方法,再综合运用虚拟示踪剂、流线模型等数模技术进行复杂水窜的时变表征,结合水窜分析的结果进行开发方案优化,定量分析固井质量对底水气藏开发的影响。研究结果表明:①等效网格定量表征固井质量的评价方法不仅可以模拟管流、渗流情况下的管外窜流,还可以模拟介于这2种流动状态间的情况,更符合实际;②综合运用径向网格加密、虚拟示踪剂、流线模型等数模技术进行复杂水窜的时变表征,解决了固井质量不好对开发影响情况分析的问题。该方法对底水气藏开发方案优化以及后期的生产动态分析具有一定的指导意义。One production-commingled well in multi-layer gas reservoirs with bottom water,western of the South China Sea,was tak-en as an objective to evaluate effects of cementing quality on reservoir development.Firstly,an evaluation method to quantitatively characterize this quality based on equivalent grids was established according to principles of both seepage and pipe flow phase.Then,two techniques of numerical simulation such as virtual tracer and streamline model were used to conduct time-varying characteriza-tion in complex water channeling,and accordingly a development plan was optimized.Finally,the cementing-quality effects on the development of bottom-water gas reservoirs were analyzed quantitatively.Results show that(i)the established evaluation method can simulate not only channeling outside pipes under pipe flow and seepage states but the situation between these two states,allowing it to be more realistic and practical;and(ii)by combining radial grid refinement with two simulation techniques for time-varying char-acterization in complex channeling,the effects of poor cementing quality can also be analyzed.This method is of guiding significance for optimizing the development plan and analyzing the later production performance in bottom-water gas reservoirs.

关 键 词：水驱气藏 固井质量 开发方案 定量评价 数值模拟 

分 类 号：TE37[石油与天然气工程—油气田开发工程] TE256