曙古1油藏停注降压开采机理研究及效果评价

碳酸盐岩潜山油藏储层孔隙主要为裂缝和溶洞，其中溶洞是主要的储集空间，裂缝是主要的渗流通道。为了控制曙古1油藏含水上升，通过降低注采比，降低地层压力，充分利用底水能量驱油，在基质孔隙和缝洞系统之间建立起有效压差，动用基质孔隙和微小裂缝中大量剩余油，从而改善了油藏开发效果。

Study on Production Mechanism of Stopping Injection and Pressure Relief and Utility Evaluation in Reservoir Shugu 1

The reservoir pores of carbonate buried-hill reservoir are mostly fractures and caverns.The caverns are the primary reservoir space and the fractures are the primary seepage channel.In order to control the rising of water cut of Reservoir Shugu 1,the development effects have been improved by reducing the formation pressure,making full use of bottom water flooding energy,establishing an effective pressure differential between matrix pores and crevices system and producing a large number of remaining oil in matrix pores and microfractures.