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低孔、低渗储层气藏水锁效应,将严重影响气田后期的开发,分析储层的水锁效应并具有针对性的进行解除,对气田的开发具有重要的意义。对苏里格气田北部区块地质特征进行了分析,通过岩心矿物和孔隙结构分析,表明研究区为典型的低孔、低渗储层,粘土矿物含量较高,加剧了水锁效应的发生。对岩心进行了室内实验分析,明确了研究区储层水锁程度与束缚水饱和度、含水饱和度和驱替压力之间的关系,并探讨了目前常见的解除水锁的工艺技术,以期为研究区解除水锁的工艺措施提供指导。
The water lock effect of gas reservoirs with low porosity and low permeability will seriously affect the later development of the gas field, analyze the water lock effect of reservoirs and release them in a targeted manner, which is of great significance to the development of gas fields. The geological features of the northern block of Sulige gas field are analyzed. Through the analysis of core minerals and pore structure, the study area shows that the study area is a typical low-porosity and low-permeability reservoir with high clay mineral content, which aggravates the water lock effect. The laboratory experiments were conducted on the core to clarify the relationship between the degree of reservoir water lock and irreducible water saturation, water saturation and displacement pressure in the study area. The common technology of water lock release was discussed in the hope of The study area to lift the water lock process to provide guidance.