低渗透裂缝性见水油藏开发方式调整对比研究

长庆油田某区为裂缝性低渗透油藏,裂缝性水窜问题较为严重,油井普遍受高含水影响,造成油井产量低且递减速度快,急需进行开发方式调整.利用加拿大Geomodeling公司SBEDStud io模型建立该区地质模型,并采用MDS数模软件进行了几种开发方式调整后的数值模拟.结果表明:应采用裂缝注水和面积注水相结合的办法进行开采;适度提高油藏压力水平利大于弊,有利于区块的油气生产,将油藏压力水平升至且保持在13~14 MPa较为合理;行列注水并不是最好方式,应采用"行-点结合"的办法,并使注采井数比接近0.7.

Study on the adjustment of development mode in low-permeability fractured reservoirs

The studied area belongs to Changqing Oilfield,and it is a low permeability and fractured reservoir.Water channeling along fractures is serious.As a result,the water cut is rising,which causes the production rapidly reducing,the development modes need to be adjusted immediately.Aiming at the water channeling along fractures,SBEDStudio model of Geomodeling Company in Canada is used to establish the geologic model of the studied area,and to simulate the adjusted development modes are simulated by using MDS simulation software.The results indicate that crack water flooding should be combined with area water flooding to develop the reservoir;properly improving the reservoir pressure is favorable to the production of the oil and gas in the studied area,and the proper pressure is 13~14 MPa;line water-flooding is not the best water-flooding mode,while the line waterflooding mode should be combined with point waterflooding mode,and the ratio of water injection wells to production wells is about 0.7.