L21区块三叠系油藏注采驱替特征探讨

The Characteristics of Injection and Production Displacement System in Triassic Reservoir of Block L21

通过试井分析储层物性特征、井筒情况和地层能量大小,结合导数曲线形态反映储层物性在横向上的变化,最终反映储层物性变化、流体性质的变化及影响压力传导的边界特征。以环江油田L21区块三叠系油藏为例,基于试井解释资料,从试井分析出发,结合各油水井生产开发曲线研究各井组的注采情况,分析注采关系及驱替特征,建立定压边界、连通干扰、裂缝主方向、渗流能力改造增强4类驱替类型特征。该研究为油田开发调整提供了可靠的技术支持。

Through well testing analysis of reservoir physical characteristics,wellbore conditions and formation energy,combined with derivative curve shape that reflected the lateral changes of reservoir physical properties,and finally the reservoir physical changes,the change of fluid properties and the boundary characteristics affecting pressure conduction were reflected.The changes reflect the deterioration of the physical properties of the reservoir or the changes in fluid properties and the boundary characteristics that affect the pressure transmission.By taking the Triassic system in L21 Block in Huanjiang Oilfield for example and based on well test interpretation data,the production and development curves of various oil and water wells were used to study the injection and production conditions of each wellblock,and the relationship between injection and production was analyzed.With the displacement characteristics,the constant pressure boundary,connected interference,main direction of fracture,and seepage capacity are determined to enhance the characteristics of the four types of displacement systems.It provides a reliable technical support for oilfield development.