动态法划分流动单元—以现河庄油田为例

doi:10.11743/ogg20050118

Abstract

Abstract:

The 2nd member of Shahejie Formation in He 43 block is divided into 5 flow units according to productivity index per meter of single layer production during water-free oil production period, distribution characteristics and the corresponding characteristics of air-permeability and relative permeability. Permeability of type Ⅰ flow unit is the best, that of type Ⅱ is relatively good, type Ⅲ medium, type Ⅳ relatively poor, and type Ⅴ poor. Laterally, the major subzones with thickness of over 3.5m are mainly of type Ⅰ,Ⅱ and Ⅲ flow units, while the non-major subzones with thickness of less than 3.5m are mainly of typeⅣ and Ⅴ flow units. Vertically, the distribution of flow units are complex, and even all of the five types of flow units can exist concurrently in a single well. This characteristic shows that the reservoirs in the 2nd member of Shahejie Formation in He 43 block have strong heterogeneity. Different flow units have different relative permeability characteristics. Oil-phase relative permeability in flow units with good poroperm characteristics decline slowly, while water-phase relative permeability goes up quickly. On the contrary, oil-phase relative permeability declines quickly, while water-phase relative permeability goes up slowly.

Key words: flow unit, reservoir parameter, reservoir evaluation, reservoir characterization, productivity index per meter

CLC Number:

TE313.5

Wang Zhigao, Jin Yanxin. Dynamic division of flow units:taking Xianhezhuang oilfield as an example[J]. Oil & Gas Geology, 2005, 26(1): 125-129.

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Dynamic division of flow units:taking Xianhezhuang oilfield as an example

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