Petroleum Exploration and Development >

2018 , Vol. 45 >Issue 1: 40 - 50

DOI: https://doi.org/10.11698/PED.2018.01.04

PETROLEUM EXPLORATION

Structural patterns of fault broken zones in carbonate rocks and their influences on petroleum accumulation in Tazhong Paleo-uplift, Tarim Basin, NW China

  • NENG Yuan ,
  • YANG Haijun ,
  • DENG Xingliang
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  • 1. Research Institute of Petroleum Exploration and Development, PetroChina Tarim Oilfield Company, Korla 841000, China
    2. China University of Petroleum-Beijing at Karamay, Karamay 834000, China

Received date: 2017-06-25

  Revised date: 2017-12-19

  Online published: 2017-12-05

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Abstract

Based on the outcrop survey, 3D seismic data interpretation, drilling data analysis, the structural patterns and distribution of fault broken zones in carbonate formations of Tazhong Paleo-uplift were established to reveal the oil and gas enrichment pattern in the fault broken zones. The following findings were reached: (1) Through the filed survey, the fault broken zone system consists of fault core, branch fault and fracture network. Affected by the active nature of the major faults, the fault broken zones differ in planar pattern and scale along the major faults. (2) 3D seismic profiles reveal that there are three types of fault broken zones in carbonate strata in Tazhong paleo-uplift, strike-slip fault broken zones, thrust fault broken zones and superimposed fault broken zones. Featuring 3 flowers and 6 belts, the strike-slip fault broken zone can be subdivided into linear type,inclined type, feather type and horsetail type. Thrust fault broken zones can be further divided into fault anticline type, anticline type and slope type. As the superimposition result of the above two kinds of fault broken zones, superimposed fault broken zones appear in three patterns, intersect type, encompassment type and penetrating type. (3) Cores from wells and geochemical data show oil and gas may migrate along the major fault and laterally. The feather type in strike-slip fault system, fault anticline type in thrust fault broken zone and intersect type in superimposed fault broken zone are possible sites for high production and efficiency wells.

Key words： Tazhong Paleo-uplift; carbonate strata; fault broken zone; structural pattern; high production well area; structural pattern

Cite this article

NENG Yuan , YANG Haijun , DENG Xingliang . Structural patterns of fault broken zones in carbonate rocks and their influences on petroleum accumulation in Tazhong Paleo-uplift, Tarim Basin, NW China[J]. Petroleum Exploration and Development, 2018 , 45(1) : 40 -50 . DOI: 10.11698/PED.2018.01.04

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