西南石油大学学报(自然科学版)

Previous Articles     Next Articles

Characteristics of the Carboniferous Volcanic Fractures and Its
Hydrocarbon Accumulation Significance in Hala′alate Mountains

Zhang Guanlong, Zhang Kuihua, Wang Shengzhu, Xu Wenguo   

  1. Research Center of New District in West China,Shengli Oilfield,SINOPEC,Dongying,Shandong 257000,China
  • Online:2014-06-01 Published:2014-06-01

Abstract:

Hala′alate Mountains Area,situated in the foreland fold thrust belts of the northwestern margin of Junggar Basin,
adjacent to hydrocarbon generation depression of Mahu,is a favorable area of hydrocarbon migration and accumulation. Carboniferous
hydrocarbon reservoir in this area was mainly hosted in the volcanic tectonic fractures and its enrichment regulation
was unknown. Aiming at this problem,we study the development characteristics,controlling factors of tectonic fractures and
its relationship with hydrocarbon accumulation. By using drilling core,imaging logging,rock mechanics tests and fluid inclusion
analysis technics,the paper studied the attitude,density,developing order,main controlling factors of Carboniferous
volcanic tectonic fractures and their relationship with hydrocarbon accumulation. The results show that the cracks in carboniferous
volcanic rocks are mainly high angle cracks,and the advantage fracture development tendency is northeast-southwest;
the main controlling factors are rock mechanics properties and structural position. Besides,due to the low filling rate,late
forming time and well matching with the major hydrocarbon migration and accumulation,the high angle fractures became the
main hydrocarbon exploration area. The results have very important guiding significance for the exploration and development
of Carboniferous volcanic hydrocarbon reservoir in Hala′alate Mountains Area.

Key words: Carboniferous system;volcanic rock;tectonic fractures;hydrocarbon accumulation;Hala&prime, alate Mountains Area