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Geoscience ›› 2017, Vol. 31 ›› Issue (06): 1241-1250.

• Petroleum Geology • Previous Articles     Next Articles

Genetic Types of Carbonate Shoal Reservoirs of Triassic Period, Sichuan Basin

DING Xiong1,2(), WU Han2, WANG Xingzhi1,2, TANG Qingsong3, MA Hualing4   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan 610500,China
    2. College of Resource and Environment,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    3. Chuanzhong Oil & Gas Field of Southwest Oil & Gas Field Company, PetroChina, Suining,Sichuan 629001,China
    4. Chuanxibei Gas Field of Southwest Oil & Gas Field Company, PetroChina, Jiangyou,Sichuan 621700,China
  • Received:2017-05-30 Revised:2017-07-21 Online:2017-12-10 Published:2017-12-25

Abstract:

The Triassic carbonate shoal reservoirs is one of the main gan producing strata in Sichuan basin.They can be genetically divided into residual intergranular pore type of carbonate shoal reservoirs, karstification type of carbonate shoal reservoirs(further divided into syndepositional karstification type of carbonate shoal reservoirs, burial karstification type of carbonate shoal reservoirs and supergene karstification type of carbonate shoal reservoirs), dolomite type of carbonate shoal reservoirs and composite type of carbonate shoal reservoirs. Residual intergranular pores and intergranular dissolved pores are main reservoir space of residual intergranular pore type of carbonate shoal reservoirs. Isolate intragranular corroded pores and mould pores are main reservoir space of syndepositional karstification type of carbonate shoal reservoirs. Solution pores and holes are main reservoir space of burial karstification type of carbonate shoal reservoirs. The difference of scales and forms of karst pores and holes are main reservoir space of supergene karstification type of carbonate shoal reservoirs. Intercrystal pores and intercrystal solution pores are main reservoir space of dolomite type of carbonate shoal reservoirs. The various reservoir spaces including complex pores system and complex holes system are main characteristics of composite type of carbonate shoal reservoirs. The further analysis result of the main control factors of types of genetic carbonate shoal reservoirs shows that the high quality carbonate shoal reservoirs are formed by sedimentary facies and constructive diagenesis modification.

Key words: genetic type, reservoir, carbonate shoal, Triassic, Sichuan Basin

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