石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (1): 72-77.doi: 10.11743/ogg20080111

• 西部油气地质 • 上一篇    下一篇

准噶尔盆地莫索湾地区地层水研究

姜林1, 宋岩1, 查明2, 曲江秀2, 薄冬梅2   

  1. 1. 中国石油天然气股份有限公司石油勘探开发研究院, 北京, 100083;
    2. 中国石油大学地球资源与信息学院, 山东, 东营, 257061
  • 收稿日期:2006-09-11 出版日期:2008-02-24 发布日期:2012-01-16

Study on formation water in Mosuowan area of the Jungger Basin

Jiang Lin1, Song Yan1, Zha Ming2, Qu Jiangxiu2, Bo Dongmei2   

  1. 1. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;
    2. College of Georesources and Information, China University of Petroleum, Dongying, Shandong 257061, China
  • Received:2006-09-11 Online:2008-02-24 Published:2012-01-16

PDF (PC)

605

被引次数

16

摘要：

莫索湾地区地层水发育情况十分复杂,存在苏林分类的Na2SO4,NaHCO3,MgCl2和CaCl2型水.在纵向上的两个压力系统中,下部高压层地层水发育为反向水化学沉积序列,上部常压层的水化学沉积序列在不同区域有所差异.结合研究区区域构造特征,通过对地层水水型、矿化度特征等的综合分析,认为莫索湾地区地层水处于NaHCO3型水的水文地质体系中;CaCl2型水来自于深部地层,通过断裂构造的沟通运移至目的层;而Na2SO4和MgCl2型水是由较高矿化度CaCl2型水与较低矿化度NaHCO3型水混合而成的;盆5井区与盆参2井区地质条件的差异造成了两井区常压层水化学沉积序列的不同;而成岩作用和生烃作用造成了高压层的反向水化学沉积序列.

关键词: 矿化度, 水化学沉积序列, 地层水, 莫索湾地区, 准噶尔盆地

Abstract:

Mosuowan area has developed a rather complicated formation water including Na2SO4,NaHCO3,MgCl2 and CaCl2 four types.There are two pressure systems in the vertical direction,of which the lower high-pressure system shows reverse hydrochemical depositional sequence,while the upper part with normal pressure system has a little different hydrochemical depositional sequences in different areas.Study on regional structure features of the area and analysis of formation water types and salinities show that formation water in Mosuowan area is within hydrogeologic system of NaHCO3 type.The CaCl2-type formation water is sourced from the deep strata and migrates into the reservoir through faults,while the Na2SO4-and MgCl2-type formation waters are mixtures of CaCl2-type water of high salinity and NaHCO3-type water of low salinity.The difference between the geological conditions in Peng-5 well-block and Pengcan-2 wellblock is the main cause of the different hydrochemical depositional sequences of the strata with normal pressure in these two wellblocks.Diagenesis and hydrocarbon generation are the reasons behind the reverse hydrochemical depositional sequences of the strata with high pressure.

Key words: salinity, hydrochemical depositional sequence, formation water, Mosuowan area, Jungger Basin

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