A Method and Application of Horizontal Well Segmentation in Heavy Oil Reservoirs With Bottom Water

doi:10.7657/XJPG20200216

Abstract

Abstract:

Segmented well completion technology can cope with the problems of early water breakthrough and liquid profile modification in horizontal wells. The paper establishes a set of methods of segmented well completion and optimized production allocation in horizontal wells in the reservoirs with bottom water by using flowing mechanics theory, reservoir engineering method, clustering analysis method and reservoir numerical simulation. Firstly, based on the comprehensive consideration of reservoir heterogeneity, pressure system, water avoidance height and well completion cost, a horizontal well is reasonably segmented by using clustering analysis method. Then the optimum additional resistance is calculated on the basis of a seepage-pipe coupling model and the principle of balanced liquid production in each segment. Finally, reservoir numerical simulation is used to compare the results of segmented well completion and conventional open-hole completion to verify the reliability of the method. The actual applications of the method in Caofeidian oilfields and Qinhuangdao 32-6 oilfield show that the average water breakthrough time is delayed by 152 days and the recovery factor can be improved by 3%-5%.

Key words: Bohai oilfield, heavy oil reservoir with bottom water, horizontal well, segmented well completion, well completion cost, additional resistance

CLC Number:

TE345

SHI Hongfu. A Method and Application of Horizontal Well Segmentation in Heavy Oil Reservoirs With Bottom Water[J]. Xinjiang Petroleum Geology, 2020, 41(2): 232-236.

Figures/Tables 3

References 18

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