Chinese Science Bulletin

, 44:174 | Cite as

Magnetic and mineralogical characteristics of reservoir rocks in the Yakela oil field, northern Ta rim Basin and their implications for magnetic detection of oil and gas accumulations

  • Qingsheng Liu
  • Shugen Liu


The evidence about hydrocarbon migration within reservoir rocks in two wells has been obtained according to results of magnetic and mineralogical analysis of the Kapushaliang Group reservoir rocks from wells S15 and S4 located at the Yakela oil field, Tarim Basin. Results show that the secondary alteration associated with oil and gas accumulations above oil and gas field is predominantly magnetite mineralization, and that sulfur alteration occurs commonly at oil-water boundary and their products are generally pyrite and pyrrhotite, except for magnetite alteration which is closely related with hydrodynamical conditionsin situ. The spherical magnetite grains of cauliflower microtexture on surface extracted from oil-bearing cores are secondary magnetite related with hydrocarbon microseepage and their diameters are usually less than 50 μm.


hydrocarbon microseepage magnetic mineralogy magnetic hysteresis loop thermal magnetic analysis reservoir petrophysics 


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Copyright information

© Science in China Press 1999

Authors and Affiliations

  • Qingsheng Liu
    • 1
  • Shugen Liu
    • 2
  1. 1.Department of Applied GeophysicsChina University of GeosciencesWuhanChina
  2. 2.The State Key Laboratory of Oil/Gas Reservoir Geology and Erploitation of ChinaChengdu Institute of TechnologyChengduChina

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