The Waterflooding Technique Analysis Of Wucangbu Oil Region

Wucangbu oil region is located at the midpiece of Yishan slope in ordos basin, the natural energy of this oil reservoir in this area is scarce, the original drive type is flexible solution gas drive, the production test exhibited the characteristics of low permeability, low-pressure, low-yield. Firstly, this article makes a detailed analysis of the reservoir characteristics in the study area. Chang6and Chang9Oil-bearing Formation reservoir are delta front deposition, whose sandstone compositional maturity and the rock type is arkose sandstone with calcium fine-grained lithic. Chang6Oil-bearing Formation sandbody development is gradually worse from north to south in the reservoir generally, and Oil-bearing properties become worse. The overall development of Chang9Oil-bearing Formation sand bodies is poor, part of a small layer of sand bodies are not developed, Chang6and Chang9plane non-homogeneity of relatively serious. Secondly, Chang6original oil in place calculated using the dissolving deposition method is821.11×104t, Chang9is828.16×104t. Thirdly, it has established a three-dimensional geological model of the study area,and proposed technical specifications of development by using numerical simulation method. I recommended for advanced water injection development scheme, The leading injection timing control in1to3months.keeping bottom-hole pressure of water injection well30-34MPa,and production well7～10MPa. Injection to production ratio is1.0-1.1.