变质岩潜山裂缝油藏高效开发技术研究与实践

Research and practice of efficient development technology of metamorphic buried hill fracture reservoir

以渤海潜山锦州25-1南油田为研究区,通过多专业结合建立了一套潜山裂缝储层预测技术及油藏高效开发技术体系,主要包括基于海上窄方位角地震资料,利用叠前横波阻抗和不同方位角各向异性差异等属性对潜山裂缝储层进行定量预测;在此基础上整合多尺度信息建立油田的三维地质模型;运用数值模拟技术开展潜山油藏开发井型、井位及注采参数优化,形成海上变质岩潜山水平井顶底交错注采开发模式;在油田的实际生产中总结见水规律,形成潜山油藏基于见水诊断的稳油控水技术。通过一系列技术的应用,锦州25-1南油田潜山油藏累增油量达到179.4万m^3,预计采收率可达到25.9%。

Taking Jinzhou 25-1S buried hill oilfield in the Bohai sea as the study area,a set of buried hill fracture reservoir prediction technology and efficient development technology are established by multi-discipline integration,including using pre-stack S-wave impedance and azimuth anisotropy difference properties to quantitatively predict buried hill fracture reservoir based on offshore narrow-azimuth seismic data.On this basis,multi-scale information is integrated and a 3D geological model of the oilfield is established.The well pattern,position and injection-production parameters of the buried hill reservoir are optimized with numerical simulation,and the staggered injection-production development mode of horizontal well in offshore metamorphic buried hill is formed.In the oilfield production,water breakthrough law is summarized,and the technology of stabilizing oil production and controlling water is formed.With the application of these technologies,the oil increment of Jinzhou25-1S buried hill reservoir comes to 179.4×104 m^3,and the prediction recovery can reach to 25.9%.