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马岭油田主力开发层系的延安组,平均渗透率为50毫达西,孔隙度17.6％,单井开采有效厚度7.3米;原始地层压力143.4大气压,饱和压力51.2大气压,压力系数1.02,油层温度50℃,地下原油粘度2.8厘泊,原始油气比46.3方/吨。油层多为封闭型,无能量补给,开采速度低,油田递减快。在弹性开采期的月递减可达11.3％。经注水后,油田面貌均有较大的好转,产油量、地层压力和动液面都有一定程度的
The Yan’an Formation, the main development zone of Maling Oilfield, has an average permeability of 50 millidarcies and a porosity of 17.6% with an effective single-well thickness of 7.3 meters. The original formation pressure is 143.4 atm, the saturation pressure is 51.2 atm, the pressure coefficient is 1.02, the reservoir temperature 50 ℃, underground oil viscosity 2.8 cps, the original oil and gas ratio 46.3 square / ton. Most reservoirs are closed type, no energy supply, mining speed is low, the oil field down faster. During the flexible mining period, the monthly decrease can reach 11.3%. After water injection, the oilfield has a larger appearance, oil production, formation pressure and moving liquid have a certain degree of