Study on Project of W ater-Gas Alternating Immiscible Displacement in Wenjisang Oilfield

Abstract

Abstract: Wenjisang reservoir in Tu-Ha field is dominated by positive rhythm or complex positive rhythm with undeveloped fauls and fractures as well as few payzone but good sands connectivity. And abundant natural gas resource found in Tu-Ha field could be y ielded by gas injection immiscible displacement. By selecting the gas injection blocks,analy zing the factors of affecting gas injection and planning the optimized pa-rameters for gas injection,the project by water-gas alternating immiscible displacement has been accomplished, forming such an efective and. practicable process of top gas injection and edge water injection for low permeability oilfield, with water-gas ratio of l:1, altermating cycle of half a year, cumulative gas-injected plug of 0.25HCPV. The oil recovery in this reservoir could be increased up to 6%~7%.

Key words: Wenjisang oilfield, remained oil, gas injection, project, oil recovery

CLC Number:

TE357.7

YANC Yong-liang, CANG Hui, YANG Zhan-hong, XU Bing-tao, CHEN Jian-qi. Study on Project of W ater-Gas Alternating Immiscible Displacement in Wenjisang Oilfield[J]. Xinjiang Petroleum Geology, 2004, 25(6): 656-658.

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Study on Project of W ater-Gas Alternating Immiscible Displacement in Wenjisang Oilfield

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