Physical experiment on edge water drive law of offshore heavy oil reservoir
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TE319

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    Abstract:

    During the development process of heavy oil reservoir with active edge water, edge water invasion will cause the water cut of production well to rise rapidly and the consequent low oil recovery efficiency. In order to better understandings of edge water drive law of offshore heavy oil reservoir and its effects on remaining oil distribution, 2D visible physical models with different well-type have been built, which are based on geological characteristics and development features of offshore heavy oil reservoir. The experimental results are shown as follows. First, edge water primarily encroaches through the areas of maximum pressure gradient in homogeneous reservoir. However, for heterogeneous reservoir, edge water mainly encroaches through high permeability part and the areas with maximum pressure gradient. Meanwhile, in comparison with heterogeneous reservoir, a more distinct water/oil front and higher reserve recovery degree will be obtained in homogeneous reservoir under the same conditions. Second, there is a higher reserve recovery degree obtained by double vertical wells compared with single vertical well. Thus, increasing the number of production well is beneficial to the improvement of reserve recovery degree. Third, horizontal well has a better effect on reservoir development than vertical well.

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Feng Qihong, Li Shang, Han Xiaodong. Physical experiment on edge water drive law of offshore heavy oil reservoir[J]. Petroleum Geology and Recovery Efficiency,2014,21(5):81~83

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  • Received:
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  • Online: June 05,2015
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