元坝复杂礁滩相气藏数值模拟同步拟合  

Synchronous matching of numerical simulation for complex biological reef in Yuanba gas reservoir

作　　者：杨丽娟[1] YANG Lijuan(Exploration and Production Research Institute,Southwest Oil and Gas Company,SINOPEC,Chengdu 610041,China)

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《复杂油气藏》2025年第1期89-96,共8页Complex Hydrocarbon Reservoirs

基　　金：国家科技重大专项“超深层复杂生物礁底水气藏高效开发技术”(2016ZX05017-005)。

摘　　要：数值模拟常规拟合是单一指标、单向拟合的过程,超深复杂生物礁底水气藏由于认识程度低、不确定参数多,模型调整多解性强,常规拟合方法拟合效率低、难以保证拟合结果的可靠性。针对超深生物礁底水气藏的复杂性,提出了同步拟合法,将模型储量、含水饱和度和生产指标作为拟合目标,将气水界面深度和毛管压力曲线与其他不确定参数一起进行调整,考虑不同拟合目标的特殊性、参数优化的针对性及整体一致性,考虑单个参数对多个指标的共同影响,在建立流体饱和度分布场和水体模型的同时,进行储量拟合、气藏压力拟合、单井压力拟合以及产水拟合;同步开展模型的建立、模型初始化、储量拟合及生产历史拟合,减少了由多参数与多指标之间的交叉影响引起的大量的重复拟合过程。与常规拟合相比,同步拟合的油压历史拟合符合率从88.6%提高到96.5%,产水历史拟合符合率从85.3%提高到89.7%;不仅提高了拟合效率、合理优化了模型、降低了拟合多解性,还提高了预测精度和可靠程度。Numerical simulation conventional matching is a process of single index and one-way matching.Ultra-deep complex biological reef bottom-water gas reservoirs,due to the low degree of understanding,numerous uncertain parameters,strong model adjustability,and the efficiency of conventional matching methods is low,and it is difficult to ensure the reliability of the matching results.In response to the complexity of ultra-deep biological reef bottom-water gas reservoirs,a synchronous matching method is proposed,which takes the model reserves,water saturation,and production indicators as the matching targets,and adjusts the gas-water interface depth and the capillary pressure curves along with other uncertain parameters.It considers the particularity of different matching targets,the specificity of parameter optimization,and the consistency of the overall,taking into account the common impact of a single parameter on multiple indicators.After establishing the fluid saturation distribution field and water body model,it conducts reserve matching,reservoir pressure matching,single well pressure matching,and water production matching;it also carries out the establishment of the model,model initialization,reserve matching,and historical production matching synchronously,reducing the extensive repetitive matching processes caused by the cross-influence of multiple parameters and indicators.Compared with the conventional matching,the compliance rate of the oil pressure history fitting is increased from 88.6%to 96.5%,and the compliance rate of the water production history fitting is increased from 85.3%to 89.7%;which not only improves the matching efficiency,reasonably optimizes the model,reduces the ambiguity of matching,but also enhances the prediction accuracy and reliability.

关 键 词：数值模拟 同步拟合 生物礁 底水气藏 过渡带 多解性 

分 类 号：TE319[石油与天然气工程—油气田开发工程]