Dynamic Reserves Evaluation of Fractured-Cavity Reservoirs With Closed Water: A Case From Halahatang Oilfield, Tarim Basin

Abstract

Abstract: The fractured-cavity carbonate reservoirs are characterized by strong heterogeneity, complex connectivity, and non-uniform oil-water contact, which lead to difficulties in reserves evaluation and poor development effect. Using dynamic data, the paper improves the material balance equation according to the characteristics of the fractured-cavity carbonate reservoirs with closed water, the dynamic reserves evaluation method for this kind of reservoirs by combining with the predicted static reserves. The dynamic oil reserves and the water size can be accurately calculated with the method under the conditions without oil-water contact location and measured PVT data of reservoirs. Good application effects have been gained in Halahatang oilfield, Tarim basin.

Key words: Tarim basin, Halahatang oilfield, fractured-cavity reservoir, carbonate, closed water, oil-water contact, material balance method, dynamic reserves

LI Hongbo, WANG Cuili, NIU Ge, LIANG Hongtao, BU Lulu, GU Junying. Dynamic Reserves Evaluation of Fractured-Cavity Reservoirs With Closed Water: A Case From Halahatang Oilfield, Tarim Basin[J]. Xinjiang Petroleum Geology, 2020, 41(zk(English)): 116-121.

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