新疆石油地质

新疆石油地质 ›› 2018, Vol. 39 ›› Issue (zk(English) ): 35-39.

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Research and Identification of Gas and Water Characteristics in Ma-55 Submember in the Southern District of Sulige Gas Field

ZHENG Xiaopeng, WANG Shujie, HAO Long, HU Weiwei, LIU Daotian, WANG Ye   

  1. PetroChina Changqing Oilfield Company, a.Research Institute of Exploration and Development; b.National Engineering Laboratory forExploration and Development of Low Permeability Oil/Gas Fields, Xi’an, Shaanxi 710018, China
  • 收稿日期:2017-10-25 修回日期:2017-12-29 出版日期:2019-01-01 发布日期:2021-05-19

Research and Identification of Gas and Water Characteristics in Ma-55 Submember in the Southern District of Sulige Gas Field

ZHENG Xiaopeng, WANG Shujie, HAO Long, HU Weiwei, LIU Daotian, WANG Ye   

  1. PetroChina Changqing Oilfield Company, a.Research Institute of Exploration and Development; b.National Engineering Laboratory forExploration and Development of Low Permeability Oil/Gas Fields, Xi’an, Shaanxi 710018, China
  • Received:2017-10-25 Revised:2017-12-29 Online:2019-01-01 Published:2021-05-19
  • About author:ZHENG Xiaopeng, E-mail: xpzheng_cq@petrochina.com.cn

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摘要： Marine carbonate reservoirs are developed in Ma-55 submember of the Lower Ordovician Majiagou formation in the southern district of Sulige gas field, which have no obvious gas-water interface. But gas wells produce water during the development process. Based on in-depth analysis of chemical characteristics of formation water, logging curve overlapping and cross-plot methods, the paper determines the formation water type and distribution pattern. The results show that the formation water in Ma-55 submember belongs to well-sealed ancient residual seawater and 3 distribution patterns exist in the submember including retained water at the bottom, gas and water in the same layer and lenticular water, among which the boundary of deep lateral resistivity between aquifer and gas-water zone is 266 Ω·m and that between gas-water zone and gas zone is 710 Ω·m.

关键词: Sulige gas field, southern district, Ordovician, Majiagou formation, gas/water characteristic, water type, distribution pattern

Abstract: Marine carbonate reservoirs are developed in Ma-55 submember of the Lower Ordovician Majiagou formation in the southern district of Sulige gas field, which have no obvious gas-water interface. But gas wells produce water during the development process. Based on in-depth analysis of chemical characteristics of formation water, logging curve overlapping and cross-plot methods, the paper determines the formation water type and distribution pattern. The results show that the formation water in Ma-55 submember belongs to well-sealed ancient residual seawater and 3 distribution patterns exist in the submember including retained water at the bottom, gas and water in the same layer and lenticular water, among which the boundary of deep lateral resistivity between aquifer and gas-water zone is 266 Ω·m and that between gas-water zone and gas zone is 710 Ω·m.

Key words: Sulige gas field, southern district, Ordovician, Majiagou formation, gas/water characteristic, water type, distribution pattern