Characteristics and Mechanism of Water Production for Fractured Vuggy Carbonate Reservoirs, Halahatang Oilfiel

doi:10.11885/j.issn.1674-5086.2015.03.18.02

Abstract

Abstract: Water breakthrough becomes common and it is difficult to solve this problem in fractured vuggy carbonate reservoirs, such as the one in Halahatang Oilfield. Based on well data characteristics, we conducted a study on the characteristics and formation mechanisms of water producing to solve the problem. Analysis shows that different water cut shapes represent different mechanisms that are related to characteristics of production intervals. Fluctuant water production includes sets of reservoirs, and water fluctuates in the non-main production layers in the form of pent-up water. Slow-rapid increase in water cuts form in relatively homogeneous producing intervals, because of the increase in output channels and relative permeability after the water coning breaks through. A sudden increase in water cut forms when producing intervals are seriously heterogenous, and the water breaks through via main production channels. According to the characteristics of reservoirs and water producing mechanisms, measures for water control are proposed, which prove to be effective and can be widely applied.

Key words: Halahatang, fractured-vuggy reservoirs, mechanism of water producing, water controlling

CLC Number:

TE33

MIN Huajun, CHEN Lixin, WANG Lianshan, ZHANG Lei, CHEN Jun. Characteristics and Mechanism of Water Production for Fractured Vuggy Carbonate Reservoirs, Halahatang Oilfiel[J]. 西南石油大学学报(自然科学版), 2017, 39(1): 114-123.

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