Methods for Calculating Oil Column Height in Reservoirs Controlled by Deep and Large Faults

Abstract

Abstract: The reservoirs controlled by deep and large faults are generally thick and deep. Therefore, a well cannot penetrate completely through an entire reservoir. For calculating the oil column height in fault-controlled reservoirs, a physical model of oil column height in fault-controlled reservoir was established. On this basis, the idea of the wellbore temperature profile extrapolation method was discussed, a formula for calculating oil column height with the conversion method of oil-water column pressure coefficient was derived, and the dynamic reserves inversion method considering the cuboid drainage area and the equivalent flow resistance method considering the influence of gravity were proposed. The four methods were applied to two wells drilled into a fault-controlled reservoir in Fuman oilfield of the Tarim basin. The results show that the oil column heights calculated by the four methods are consistent, and the average oil column heights of the two wells are 675.39 m and 634.60 m, respectively.

Key words: Tarim basin, Fuman oilfield, fault-controlled reservoir, oil column height, wellbore temperature, oil-water column pressure, dynamic reserves, flow resistance

WANG Rujun, WANG Peijun, NIU Ge, WANG Huailong, ZHANG Jie, LIANG Ruihan, ZHAO Xinyue. Methods for Calculating Oil Column Height in Reservoirs Controlled by Deep and Large Faults[J]. Xinjiang Petroleum Geology, 2023, 44(zk(English)): 143-147.

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