CHARACTERISTICS OF FORMATION WATER AND THE GENESIS ANALYSIS IN THE WESTERN LIAOHE SAG

doi:10.3863/j.issn.1000-2634.2008.05.012

西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (5): 58-63.DOI: 10.3863/j.issn.1000-2634.2008.05.012

• 地质勘探 • Previous Articles Next Articles

CHARACTERISTICS OF FORMATION WATER AND THE GENESIS ANALYSIS IN THE WESTERN LIAOHE SAG

LENG Ji-gao^1a,1b PANG Xiong-qi^1a,1b ZHANG Feng-qi² CUI Li-jing³ LIU Hai-bo⁴

1.China University of Petroleum:a.Key laboratory of Hydrocarbon Accumulation of Education of Ministry,b.Basin & Reservoir Research Center,Beijing 102249,China; 2.School of Petroleum Resources,Xi′an Shiyou University,Xi′an Shaanxi 710065,China；3.Exploration and Development Research Institute,Liaohe Oilfield Company,PetroChina,Panjin,Liaoning 124010,China； 4.Yanchang Oil field co.,Ltd,Yanchuan Shaanxi 717208,China

Received:1900-01-01 Revised:1900-01-01 Online:2008-10-20 Published:2008-10-20

Abstract

Abstract: Low-salinity,94.3% chemical composition of HCO₃^－、Cl^－、Na⁺the main formation water form with NaHCO₃and NaCl are the basic characteristics of the NaHCO₃ type fluid in the west Liaohe sag,based on the 886 samples of formation water analysis.Na⁺ cation takes up not only absolute superiority but also controls of chemical spatial distribution the formation water.Rich albitization of plagioclase of the source rocks in the vicinity is the key factor controlling Na⁺ coming into being.Besides of water-rock interaction,the large number of hydrocarbon generation has close relationship with HCO₃^－accumulation.Cl^－comes from the dissolved salt matter.Impacted by basement morphology and tectonic evolution,formation water can be divided into two relatively independent fluid activity units in north and south respectively.The north is mainly affected by the water evaporation and the south is controlled by hydrocarbon generation.

Key words: geochemistry of formation water, salinity, water-rock interaction, western Liaohe Sag

CLC Number:

TE133.2

LENG Ji-gaoa;b PANG Xiong-qia;b ZHANG Feng-qi CUI Li-jing LIU Hai-bo. CHARACTERISTICS OF FORMATION WATER AND THE GENESIS ANALYSIS IN THE WESTERN LIAOHE SAG [J]. 西南石油大学学报(自然科学版), 2008, 30(5): 58-63.

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CHARACTERISTICS OF FORMATION WATER AND THE GENESIS ANALYSIS IN THE WESTERN LIAOHE SAG

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