Article: Phase behaviour analysis of condensate gas reservoirs in Dabei oil and gas area: impact of variable wax content on dew point pressure, flash separation, and condensate recovery Journal: International Journal of Oil, Gas and Coal Technology (IJOGCT) 2025 Vol.37 No.5 pp.1 - 15 Abstract: In the Dabei oil and gas field, addressing wax deposition in condensate gas reservoirs is crucial. By analysing field-obtained samples with varied wax contents (7%, 12%, 19%, 28%) using the HPVT-150 PVT instrument, we observed minimal changes in flash steam composition but notable enrichment in flash oil components and increased condensate oil densities. Higher wax content led to an increased flash gas-to-oil ratio, dew point pressure, and reverse condensate saturation, impacting heavy hydrocarbons. Recovery efficiency of condensate oil decreases with higher wax content and abandonment pressure at 10MPa. These findings are pivotal for developing high-wax condensate reservoirs. [Received: July 24, 2024; Accepted: March 3, 2025] Inderscience Publishers - linking academia, business and industry through research

Title: Phase behaviour analysis of condensate gas reservoirs in Dabei oil and gas area: impact of variable wax content on dew point pressure, flash separation, and condensate recovery

Authors: Rujun Wang; Yongliang Tang; Chengze Zhang; Dong Chen; Cong Wei; Wei Zhou; Furong Wang

Addresses: PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China ' PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China ' PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China ' PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China ' PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China ' Research Institute of Petroleum Exploration and Development, No. 20 Xueyuan Road, Haidian District, Beijing, 100083, China ' PetroChina Tarim Oilfield Company, Xinjiang Uygur Autonomous Region, Korla Xinjiang 841000, China

Abstract: In the Dabei oil and gas field, addressing wax deposition in condensate gas reservoirs is crucial. By analysing field-obtained samples with varied wax contents (7%, 12%, 19%, 28%) using the HPVT-150 PVT instrument, we observed minimal changes in flash steam composition but notable enrichment in flash oil components and increased condensate oil densities. Higher wax content led to an increased flash gas-to-oil ratio, dew point pressure, and reverse condensate saturation, impacting heavy hydrocarbons. Recovery efficiency of condensate oil decreases with higher wax content and abandonment pressure at 10MPa. These findings are pivotal for developing high-wax condensate reservoirs. [Received: July 24, 2024; Accepted: March 3, 2025]

Keywords: condensate gas reservoir; wax content; dew point pressure; phase behaviour.

DOI: 10.1504/IJOGCT.2025.146107

International Journal of Oil, Gas and Coal Technology, 2025 Vol.37 No.5, pp.1 - 15

Received: 16 Jul 2024
Accepted: 03 Mar 2025
Published online: 06 May 2025 *

Title: Phase behaviour analysis of condensate gas reservoirs in Dabei oil and gas area: impact of variable wax content on dew point pressure, flash separation, and condensate recovery

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