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沈625潜山油藏类型为具有层状特点的裂缝型块状灰岩潜山油藏,储量规模大,目前沈625潜山部分边部区域井距较大,且井网不完善。针对此问题,我们对沈625潜山边部展开综合研究。最终根据该块采用一套开发层系,高部位注气+低部位注水+中间采油开发方式进行整体开发动用的原则。按200m井距,有效厚度大于40m、低水淹或未水淹区、动用程度较低的边部区域部署4口水平井,其中采油井3口,注入井1口,完成注采井网,提高边部储量动用程度。
The type of buried hill reservoir in Shen 625 is a fractured massive limestone buried hill reservoir with layered features, and the reserves are large in scale. At present, the well spacing in the partial border area of Shen 625 buried hill is large and the well pattern is imperfect. In response to this problem, we conducted a comprehensive study of Shen 625 buried hillsides. Finally, according to the block using a set of development strata system, high-site injection + low part of the water injection + middle oil development approach to the overall development and utilization of the principle. Four horizontal wells with 200m well spacing, effective thickness greater than 40m, low flooding or undrained area and low degree of utilization are deployed, of which 3 are production wells and 1 is injection well, completing the well pattern of injection and production The use of the edge of the reserve.