牛东火山岩油藏井网适应性研究

Study on Well Pattern Adaptability of Volcanic Reservoir in Niudong

文章分析了探测半径与储层物性之间的关系,研究确定了不同类型火山岩储层的泄油半径与合理井距,裂缝发育程度越高,探测半径越大,所需井距越小。利用压降产能结合压力等值图计算了天然能量采收率,值较低。从前期五个注水井组取得的初步效果,认为注水开发技术对于牛东火山岩油藏是可行的。研究结果对类似油藏井网部署、注水开发具有指导意义。

Based on the analysis of relationship between drainage radius and physical properties, the drainage radius and reasonable well spacing of different types of volcanic reservoir are determined. It is found that the drainage radius and well spacing depend on fracture development, the higher the degree of fracture development, the larger the drainage radius and the smaller the required well spacing. The value of recovery ratio natural energy, calculated by combining productivity of pressure drop and pressure contour program, is low. According to the effect of five previous water injection well groups, application of water injection technique in Niudong volcanic reservoir is feasible. The results of the study have a meaning of guidance to the well pattern determination and the water injection development of similar oilfield.