A New Method to Determine Oil-Water Seepage Characteristics in Oil Reservoirs

doi:10.7657/XJPG20200611

Abstract

Abstract:

The microscopic oil-water seepage characteristic equation corresponding to the Maksimov-Tong water drive characteristic curve can be obtained by combining differential and material balance equation with Welge equation on the basis of the Maksimov-Tong water drive characteristic curve. It is a new method for determining oil-water seepage characteristics by using production data. Taking the PuⅠ oil reservoirs with good physical properties in Block Nan-2 and Nan-3 of Daqing oilfield as a case, we established the detailed calculation process based on production data, and found the calculated results were almost consistent with water flooding experimental results, indicating that the new method is feasible. Furthermore, the method was applied in the Niujuanhu oil reservoir with extra-low permeability in Wellblock Ma-62 of Santanghu oilfield. But the oil-water seepage characteristics in Wellblock Ma-62 after volume fracturing were very different from the laboratory experimental results obtained from its adjacent wellblocks, indicating that the oil-water seepage characteristics determined in laboratory experiments can only reflect the oil-water seepage characteristics of the basement instead of the porous reservoir during water flooding development.

Key words: Santanghu oilfield, Niujuanhu oil reservoir, Daqing oilfield, water-injected reservoir, production data, oil-water seepage charac- teristic, water drive curve

CLC Number:

TE341

JING Wenbo, WANG Rui, LIU Junhui, GAO Wenjun. A New Method to Determine Oil-Water Seepage Characteristics in Oil Reservoirs[J]. Xinjiang Petroleum Geology, 2020, 41(6): 709-713.

Figures/Tables 8

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