沈家铺地区难采储量开发评价方法及效果

Development evaluation method and its application result in difficult-to-recover reserve in Shenjiapu area

大港油田沈家铺地区的枣Ⅳ、Ⅴ油组属复杂断块稠油油藏 ,由于构造落实程度低、测井解释符合率低、原油性质差、产能不落实 ,一直未能投入开发。 1997年开始 ,在重新处理解释三维地震资料落实构造、测井多井评价、试油、试采的配套采油工艺等方面开展针对性较强的研究及现场实验 ,编制了整体开发方案 ,合理划分开发层系并确定了开发方式及合理采油速率 ,共钻井 3 9口 ,单井产能明显提高 ,形成了较大规模生产能力。图 2表 3参 2 (刘树明摘 )

Zao IV and V payzones in Shenjiapu area of Dagang oil field belong to heavy and viscous crude reservoirs of complicated fault blocks. The density of degased crude oil is 0.9436g/cm 3, the viscosity is 1381.3mPa.s, the gum and asphalt content is 45.07%, and the pour point is 30℃. Since structure is not determined, logging interpretation coincidence rate is low, crude oil property is poor, productivity is not practicable, these zones have not been put into development since 1971 after drilling. As difficult to recover reserves they have been carried out comprehensive evaluation from 1997. A series of research and pilot tests have been done toward many aspects such as three dimensional seismic data reprocessing, structural reinterpretation, multiple well logging evaluation, well test, producing test, corresponding production process to ascertain structure and obviously enhance single productivity. Integral development program is also compiled. Layer series of development are rationally divided. At the same time, development scheme and rational recovery rate are determined. There are altogether 39 drilled wells at Shenjiapu area to form a larger production capacity.