Fluid Phases and Gas Reservoirs of Qingshuihe Formation in Well Hutan-1

摘要/Abstract

摘要： After characterizing the gas reservoir of the Qingshuihe formation in Well Hutan-1 as a condensate gas reservoir, the fluid phase behaviors around the well were studied through a series of experiments of one-time degassing, fluid composition, constant-mass expansion and constant-volume depletion. The research results show that the formation fluid compositions are characterized by high contents of light components and low contents of medium and heavy components, indicating a typical gas reservoir containing less condensate oil. Due to a few condensate fluid and a big difference between formation pressure and dew point pressure, it is not necessary to supplement energy in the early production stage. In addition, re-injecting associated gas can inhibit retrograde condensate and increase the recovery of Well Hutan-1. Based on the production data, fluid phase behavior, pressure-temperature phase diagram of the formation fluid, triangular ternary phase diagram and empirical discrimination, the reservoir of the Qingshuihe formation in Well Hutan-1 is deemed as a condensate gas reservoir with a large oil ring.

关键词: Junggar basin, Well Hutan-1, Qingshuihe formation, fluid phase behavior, reservoir type, condensate gas reservoir

Abstract: After characterizing the gas reservoir of the Qingshuihe formation in Well Hutan-1 as a condensate gas reservoir, the fluid phase behaviors around the well were studied through a series of experiments of one-time degassing, fluid composition, constant-mass expansion and constant-volume depletion. The research results show that the formation fluid compositions are characterized by high contents of light components and low contents of medium and heavy components, indicating a typical gas reservoir containing less condensate oil. Due to a few condensate fluid and a big difference between formation pressure and dew point pressure, it is not necessary to supplement energy in the early production stage. In addition, re-injecting associated gas can inhibit retrograde condensate and increase the recovery of Well Hutan-1. Based on the production data, fluid phase behavior, pressure-temperature phase diagram of the formation fluid, triangular ternary phase diagram and empirical discrimination, the reservoir of the Qingshuihe formation in Well Hutan-1 is deemed as a condensate gas reservoir with a large oil ring.

Key words: Junggar basin, Well Hutan-1, Qingshuihe formation, fluid phase behavior, reservoir type, condensate gas reservoir

WANG Qixiang, LIANG Baoxing, LIU Huan, SHI Feng, JIN Jun, ZHOU Wei, TUO Hong. Fluid Phases and Gas Reservoirs of Qingshuihe Formation in Well Hutan-1[J]. 新疆石油地质, 2021, 42(zk(English)): 135-139.

WANG Qixiang, LIANG Baoxing, LIU Huan, SHI Feng, JIN Jun, ZHOU Wei, TUO Hong. Fluid Phases and Gas Reservoirs of Qingshuihe Formation in Well Hutan-1[J]. Xinjiang Petroleum Geology, 2021, 42(zk(English)): 135-139.

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