气藏描述过程中静动态资料的整合及应用

Integration and application of static and dynamic data in gas reservoir description

气藏描述是气田开发地质的核心任务,气藏描述过程中静动态资料相联系的程度决定着气藏描述水平的高低。针对传统气藏描述因“地质是开发的内因”和“静动态资料结合”技术理念存在的气藏描述瓶颈,提出了“静动态资料整合”技术理念,明确了“静动态资料整合”的内涵以及“静动态资料整合”的关键点。研究结果表明:①“静动态资料整合”即在静动态资料结合、融合的基础上,关注关键细节上的静动态资料的对应或定量关系,实现基于整体观框架下静态描述和动态描述的统一与综合,包含静动态资料结合、融合和整合3个阶段;②储层改造后的结构描述、不同类型储层气井的产能评价、气井产能及其主控因素,以及基于动态分析描述气藏数值模型渗流场是“静动态资料整合”技术理念的4个关键方面;③结合四川盆地川西北区块栖霞组、安岳气田震旦系、磨溪地区雷一1亚段等领域气藏描述的探索,提升了气藏描述中储层结构、产能、产能主控因素以及精细数值模拟4个方面的可靠性和矿场实践性。研究结果奠定了“静动态资料整合”技术理念和应用思路,为四川盆地已开发气田的科学开发提供了技术支持,并可促进气藏描述水平的快速发展,对保障国家能源安全具有重要的指导意义。

Gas reservoir description is the core task of gas field development geology,and the degree of correlation between static and dynamic data in the process of gas reservoir description determines the level of gas reservoir description.Aiming at the bottleneck of gas reservoir description exised by the technical concept of"geology is the internal cause of development"and"static dynamic data integration"in traditional gas reservoir description,a technical concept of"static dynamic data integration"was proposed,and the connotation of"static dynamic data integration"and the key points of"static dynamic data integration"were clarified.The research results show that:First,static and dynamic data integration refers to focusing on the corresponding or quantitative relationships between static and dynamic data in key details based on the combination and fusion of static and dynamic data,achieving the unification and integration of static and dynamic descriptions based on a holistic framework,including three stages of static and dynamic data combination,fusion,and integration.Second,the structural description after reservoir reconstruction,productivity evaluation of different types of reservoir gas wells,productivity and main control factors of gas wells,and the description of gas reservoir numerical model seepage field based on dynamic analysis are four key aspects of the technical concept of"static and dynamic data integration";Third,combined with the exploration of gas reservoir description in fields such as Qixia Formation in Northwest Sichuan Block,Anyue Gas Field Sinian,Moxi Area T2l11,etc.,the reliability and field practicality of reservoir structure,productivity,main control factors for productivity,and fine numerical simulation in gas reservoir description havd been improved.The conclusion is that the research results establish a concept of"static and dynamic integration"technology and technical application methods,provide technical support for the scientific development of developed gas fields in the Sichuan Basin,and promote the rapid development of gas reservoir description level,which has important guiding significance for ensuring national energy security.