中低渗砾岩油藏井距适应性研究

发布时间：2018-04-24 16:07

本文选题：砾岩油藏 + 评价体系　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：井网是连接地下油藏与地面的媒介,井网井距与油藏的适应性对开发效果的好坏起着非常重要的作用。目前针对砂岩油藏合理井网井距研究已经相对成熟,但对于砾岩油藏的研究尚不充分,特别是中低渗砾岩油藏,初期井网密度已经很高,受经济效益的限制,加密调整余地较小,因此开展中低渗砾岩油藏井网井距适应性研究、筛选影响合理井距的主控因素、分析合理井距与主控因素的内在关系,对于高效中低渗砾岩油藏有着重要意义。本文首先调研分析了砾岩油藏的特殊性,在此基础上综合运用数理统计、对比分析、油藏工程、数值模拟方法等多种手段,从油藏开发效果评价、采收率经验公式分析、理论公式分析、油藏动态分析认识、油藏特征模型等方面深入分析,明确了合理井网井距的主控因素。利用一注一采模型,推导了变截面B-L方程,结合新型含水率预测模型推导了的砾岩油藏多因素采出程度理论公式。利用模糊数学综合评价方法筛选了合理井网井距评价指标,计算了合理井网井距主控因素在不同储层条件、不同开发阶段的权重,并回归了中低渗砾岩油藏合理井距与主控因素关系式,结合计算井网密度的常用油藏工程方法,形成了砾岩油藏合理井网井距评价体系,编制了多因素合理井网井距评价软件,并该评价体系推广到其他区块,证明其具有较好的适用性。
[Abstract]:Well pattern is the medium to connect underground reservoir and surface. The adaptability of well spacing and reservoir plays a very important role in the development effect. At present, the research on reasonable well spacing in sandstone reservoir has been relatively mature, but the study of conglomerate reservoir is not enough, especially in low permeability conglomerate reservoir, the initial well pattern density is very high, which is limited by economic benefit. There is little room for infilling adjustment, so the adaptability study of well spacing in low and medium permeability conglomerate reservoir is carried out, the main control factors affecting reasonable well spacing are screened, and the internal relations between reasonable well spacing and main control factors are analyzed. It is of great significance for high efficiency and low permeability conglomerate reservoir. In this paper, firstly, the particularity of conglomerate reservoir is investigated and analyzed. On the basis of this, we use various methods, such as mathematical statistics, comparative analysis, reservoir engineering, numerical simulation and so on, to evaluate the reservoir development effect and analyze the empirical formula of oil recovery. Theoretical formula analysis, reservoir performance analysis and reservoir characteristic model are analyzed in depth, and the main controlling factors of reasonable well spacing are defined. The B-L equation of variable cross section and the theoretical formula of multi-factor recovery degree of conglomerate reservoir are derived by using one injection-production model and a new water cut prediction model. The evaluation index of reasonable well spacing is screened by comprehensive evaluation method of fuzzy mathematics, and the weights of main controlling factors of reasonable well spacing in different reservoir conditions and different development stages are calculated. The relationship between reasonable well spacing and main control factors in low and medium permeability conglomerate reservoir is regressed. Combined with common reservoir engineering method to calculate well pattern density, a reasonable well spacing evaluation system for conglomerate reservoir is formed, and a multi-factor reasonable well spacing evaluation software is developed. The evaluation system is extended to other blocks to prove its good applicability.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE324

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