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Study the Fluid Inclusion of the Ordovician Reservoir of the 83 Wellblock of Tazhong

Author: ChenYanGui
Tutor: ZhangDeHui；ZhangZuo
School: Chinese Geology University (Beijing)
Course: Earth Exploration and Information Technology
Keywords: Tower 83 wells in the area Hydrocarbon inclusions Fluorescence analysis
CLC: P618.13
Type: Master's thesis
Year: 2010
Downloads: 141
Quote: 1
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Abstract


Tower medieval uplift is located in central Tarim Basin, is a long-term development of the inheritance palaeohigh close hydrocarbon Depression, has superior hydrocarbon accumulation conditions, the Tarim Basin, an important oil and gas-rich region is an important direction finding giant fields. Tazhong 83 wells located in Tazhong low uplift of I No. slope break belt and central uplift with the wide slow constructed between District. The reef flat Upper Ordovician Lianglitage, complex and Lower Ordovician weathering crust reservoir is the main exploration target in the block. Through 83 wells Ordovician core observation, sampling and grinding, and combined with fluid inclusions microscopy, fluorescence analysis of fluid inclusions and its temperature and salinity analysis techniques flakes and temperature measurement chip testing and analysis, has learned that 83 wells in the tower Ordovician reservoir the four hydrocarbon inclusions, characterized as follows: 1) Part I: Black developed a fluorescent liquid hydrocarbon inclusions; 2) Phase II: is divided into early and late Early Phase II brown liquid hydrocarbon inclusions of gas-liquid two-phase hydrocarbon inclusions, the UV fluorescence issued a strong yellow or yellow-green fluorescence; late Phase II of brown liquid two-phase hydrocarbon inclusions Hair by UV fluorescence brown fluorescence; 3) Phase III: light brown liquid two-phase the hydrocarbon inclusions dark gray gaseous hydrocarbon inclusions, gas-liquid two-phase hydrocarbon inclusions issued a strong blue fluorescence in ultraviolet fluorescence; 4) Part IV: In order to gray and black gaseous hydrocarbon inclusions not fluoresce. Fluid inclusions component analysis and fluorescence analysis technology, and combined with the inclusion temperature and pressure analysis, of the four hydrocarbon inclusions: Phase I of the hydrocarbon inclusions from the Cambrian - Lower Ordovician hydrocarbon source rocks of oil and gas accumulation in the Caledonian period, its accumulation in pressure of about 15 to 23 MPa, wrapped the body oil for heavy oil. Phase II of hydrocarbon inclusions reservoir for oil and gas from the Cambrian - Lower Austria decency hydrocarbon source rocks in the late Hercynian accumulation pressure of about 30 to 35 MPa, wrapped the body of the oil quality - heavy oil. Phase III and IV of hydrocarbon inclusions for oil and gas from the Cambrian - Lower Austria decency hydrocarbon source rocks in Himalayan period of accumulation, reservoir formation pressure of about 40 ~ 60 MPa, wrapped the body of the oil as condensate or condensate gassing. Based on the above analysis, combined with 83 well area of ??today's oil and gas reservoirs in the tower Ordovician Liang Li Tage group the main reservoir for the condensate condensate oil and a small amount of gas condensate and Lower Ordovician reservoir mainly gas condensate characteristics speculated tower 83 well area Ordovician hydrocarbon reservoirs are gathered in the Himalayan period from Cambrian - Lower Ordovician hydrocarbon source rocks Phase III and IV of hydrocarbon inclusions accumulation and save today. In summary, fluid inclusions technology is an effective way to solve the reservoir formation of oil and gas sources.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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