关键词: font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">双孔单渗模型；水锥形态；油水界面；裂缝系统；剩余储量；复杂水平井

Abstract:

Renqiu buried hill is the largest fractured and lowsaturated carbonate rock reservoir with massive bottom water. After thirty years’ development, the reserve has entered into the late stage, which declines slowly in high water cut. Therefore, it is a great significance to figure out the remaining oil distribution for the late potential tapping and improvement of development response. On the basis of fracture prediction, this paper studies the remaining oil distribution rule between the water cones. With the digital simulation research connected with the new geologic model and production performance, the double porosity model in single permeability has been built. Through the research on the changing of oilwater contact in different phases and the research on the evolution process and formation mechanism of water cones, the depth of oilwater contact and the shape of water cones at the present stage are defined. At the same time, the remaining geological reserve over oilwater contact in fracture system is basically calculated. Finally, with the feasibility study to exploit the remaining oil between the water cones by complex horizontal well and other effective methods, the economical and effective tapping modes are proposed.

Key words: font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">double porosity model in single permeability, water cones shape, oilfont-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">water contact, fracture system, remaining geological reserves, complex horizontal well