塔河油田缝洞单元注水开发研究与应用

RESEARCH AND APPLICATION OF FISSURE CAVE UNIT WATERFLOODING IN TAHE OILFIELD

塔河油田岩溶缝洞型油藏储量达到10×108t,是目前国内最大碳酸盐岩缝洞型油藏。以天然能量开发为主,受能量下降和油井含水快速上升的影响,采收率只达到15%。近年来通过与国内外石油公司、研究院(所)和大学开展了广泛的技术合作,初步建立了独具特色的缝洞型油藏勘探开发技术方法系列。认识到了缝洞单元是开发的基本单元,建立了缝洞单元的描述技术,形成了以缝洞单元为基础的差异化开发技术,逐步摸索出了酸压、侧钻、堵水、单井注水替油等提高采收率技术方法,开展了单元注水开发先导试验,通过注水各缝洞单元能量不同程度恢复。

The reserves of Karst fracture-cavity reservoir in Tahe Oilfield is to 1 billion tons,which is the largest carbonate fracture-cavity reservoir.The recovery ratio reached only 15% because reservoir developed by natural energy and influenced by formation energy decreases and water rise fast.Through the technical cooperation with domestic and international oil companies,research institutes and university in recent years,the exploration and development methods on unique vuggy reservoirs were established.The slit hole unit is the basic unit of development,the description technology of slit hole unit was set up,the difference development techniques base on fissure cave unit were formed,the enhancing oil recovery technology such as acid fracturing,sidetracking,plugging,single well injection water etc.were researched.The pilot test for unit waterflooding was done,the energy of injection water fissure cave unit was resumed.