Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (4): 125-136.doi: 10.12108/yxyqc.20230412

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Prediction of favorable lithofacies and exploration direction of Carboniferous in Fudong slope,Junggar Basin

WU Xiaoning, DENG Yong, LIN Yu, ZHONG Houcai, KANG Xiaoning, WANG Yuting, QU Lin   

  1. Urumqi Branch of BGP Inc., CNPC, Urumqi 830016, China
  • Received:2022-07-08 Revised:2022-08-08 Online:2023-07-01 Published:2023-07-01

Abstract: Based on the analysis of cores,logging and seismic facies,the lithofacies of Carboniferous in Fudong slope of Junggar Basin was divided and the distribution of volcanic rocks was predicted,and the favorable exploration direction was pointed out. The results show that: (1)There are five lithofacies of Carboniferous developed in Fudong slope: volcanic vent facies,explosive facies,overflow facies,argillaceous tuff facies,sedimentary pyroclastic facies,among which the explosive facies and overflow facies are favorable reservoir facies.(2)The volcanic vent facies in the study area is characterized by medium-low frequency,medium-strong amplitude,disordered funnel-shaped or columnar reflection, the explosive facies is characterized by medium-low frequency, mediumweak amplitude and disordered mound reflection,the overflow facies is characterized by low frequency,strong amplitude and continuous reflection,the argillaceous tuff facies is characterized by low frequency,mediumstrong amplitude and continuous reflection,and the sedimentary pyroclastic facies is characterized by medium frequency,medium-strong amplitude and continuous reflection.(3)The overflow facies of section b of Songkaersu Formation is mainly distributed in the southeast of the study area,the north of well XQ11 and the west of well XQ17 to XQ11,and the explosive facies of section a of Songkaersu Formation is mainly distributed in the main part of Xiquan nose-uplift.(4)Explosive facies and overflow facies are developed on a large scale in Xiquan nose-uplift of the study area,and they are close to hydrocarbon generation center of Carboniferous,with developed fractures and superior reservoir accumulation conditions, so it is a favorable area for natural gas exploration.

Key words: volcanic rock, lithofacies division, seismic facies, explosive facies, overflow facie, fracture, Carboniferous, Fudong slope, Junggar Basin

CLC Number: 

  • TE122.2
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