Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (3): 99-109.doi: 10.12108/yxyqc.20230309

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Development characteristics of FⅠ16 fault in Fuman oilfield of Tarim Basin and its influence on oil and gas distribution

SONG Xingguo1,2, CHEN Shi1,2, YANG Minghui1,2, XIE Zhou3, KANG Pengfei3, LI Ting3, CHEN Jiuzhou3, PENG Zijun3   

  1. 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
    2. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
    3. PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China
  • Received:2022-05-29 Revised:2022-07-13 Online:2023-05-01 Published:2023-04-25

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Abstract: The data of 3D seismic，multi-layer coherence analysis，amplitude change rate，reservoir core analysis and oil and gas distribution were used to analyze the spatial distribution characteristics， activity intensity and stages of FⅠ16 fault in Fuman oilfield of Tarim Basin， and the control effects of fault on reservoir and accumulation were discussed. The results show that： （1）The FⅠ16 fault in Fuman oilfield has the characteristics of plane segmentation and vertical stratification. On plane， it can be divided into three segments from north to south，the northern segment spreads along NE 10° and develops horsetail-like structure，the middle segment spreads along NE 20° and is in the transition position of fault strike，mainly develops left-order oblique row，and the southern segment spreads along NE 30° with strong linear extension characteristics， mainly right-order oblique sequence. Vertically， it can be divided into deep structural deformation layer below the bottom of Upper Cambrian（TЄ3）and the shallow structural deformation layer of the bottom of Upper Cambrian to the top of Ordovician Yijianfang Formation （TO3t）. The deep fault activity is weak， the branch is less developed， only the local flower structure is developed. While the shallow fault activity is strong，the flower structure is generally developed，and there exists the phenomenon of “multi-flower superposition” and stratigraphic co-deposition in the fracture zone vertically.（2）The activities of FⅠ16 fault in Fuman oilfield can be divided into two stages： early Caledonian and middle Caledonian. The middle Caledonian is the main active stage，with stronger intensity and multi-episode activation characteristics，and the activity intensity is strong in the north and weak in the south on plane， showing the characteristics of shallow upper arch and deep decline in the vertical direction，and the shallow fault activity is stronger.（3）The reservoirs in the study area are mainly fault-controlled fracture-cave reservoirs，controlled by fault fragmentation， distributed in a strip along the FⅠ16 fault zone on plane，and superimposed deep and shallow layers vertically. Affected by the distribution characteristics of Middle Cambrian gypsum salt rocks，the FⅠ16 fault zone has the oil and gas distribution characteristics of “south oil and north gas”.

Key words: FⅠ16 fault, strike-slip fault, fault-controlled reservoir, fault-controlled accumulation, fracture-vuggy carbonate reservoir, Upper Cambrian, Ordovician Yijianfang Formation, Fuman oilfield, Tarim Basin

CLC Number: 

  • TE122.2
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