多层合采气藏分层储量动用特征及判定方法  

Separated Reserve Producing Characteristic and Determination in Multi-layer Commingled Producing Gas Reservoir

作　　者：徐轩[1,2] 朱华银 徐婷 郭辉 闫永强[4] 

机构地区：[1]中国矿业大学,北京100083 [2]中油勘探开发研究院廊坊分院,河北廊坊065007 [3]中油长庆油田分公司,陕西靖边715800 [4]中油大庆油田有限责任公司,黑龙江大庆163000

出　　处：《特种油气藏》2015年第1期111-114,156,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05015)子课题"多层疏松砂岩气藏开发关键技术"(2011ZX05015-004)

摘　　要：针对多层气藏合采过程中分层产气量差异大、储量动用不均衡的问题,运用物理实验和数值模拟相结合的方法,系统、定量地研究了层间非均质性和压力系统差异对分层产气量和储量动用的影响,提出储量动用均衡性的界定方法,即分层累计产气量贡献率比值小于3∶2为储量动用较均衡;分层累计产气量贡献率比值大于3∶2而小于3∶1为储量动用欠均衡;分层累计产气量贡献率比值大于3∶1储量动用不均衡。以此为依据,获得了多层气藏气井分层储量动用判定方法及判断图版。实例分析表明,利用此方法可在开发方案决策前对层间分层产气量贡献和储量动用均衡性进行评估,为气藏储量动用评价提供技术支持。The commingled production of multi- layer gas reservoir is usually featured by large difference in separated gas production and unbalance of reserve producing. Physical experiments and numerical simulations are used to systematically and quantitatively study the effect of inter- layer heterogeneity and pressure on separated gas production and reserve producing degree,and the reserve producing balance determination is also proposed. When the ratio of inter- layer cumulative gas production contribution rates is lower than 3∶ 2,reserve producing is relatively balanced. When the ratio of inter- layer cumulative gas production contribution rates is higher than 3∶ 2 or is lower than 3∶ 1,reserve producing is under balanced. When the ratio of inter- layer cumulative gas production contribution rates is higher than 3∶ 1,reserve producing is unbalanced. The well separated reserve producing determination and plate are established based on above- mentioned ratios. Practical application demonstrates that this method can be used to evaluate reserve producing balance and separated gas production contribution rate before implementing the development plan,which could provide references for the gas reserve producing evaluation.

关 键 词：多层合采 数值模拟 物理模拟 分层产气量 储量动用程度 分层累计产气量贡献率 

分 类 号：TE341[石油与天然气工程—油气田开发工程]