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Geoscience ›› 2017, Vol. 31 ›› Issue (02): 302-314.

• Energy Geology • Previous Articles     Next Articles

Modification Mechanism of Physical Properties of Deeply-buried Sandstone Reservoir due to the Burial Compaction and Lateral Extrusion in Kuqa Depression

GAO Zhiyong1,2(), CUI Jinggang1,2, FENG Jiarui1,2, ZHOU Chuanmin1,2, SHI Yuxin1,2   

  1. 1. Petroleum Geology Research and Laboratory Center, Research Institute of Petroleum Exploration and Development,PetroChina, Beijing 100083,China
    2. State Key Laboratory of Enhanced Oil Recovery(Research Institute of Petroleum Exploration and Development,PetroChina),Beijing 100083,China
  • Received:2016-03-17 Revised:2016-09-20 Online:2017-04-10 Published:2017-04-25

Abstract:

Early shallow buried for a long time, the late quickly buried deep and strong lateral compression in western foreland basin are common geological evolution process. Burial compaction (mechanical)-lateral extrusion process plays an important role to deep sandstone reservoir petrophysical properties and reservoir properties. Diagenetic physical modelling experiment is studied, and the process of the transformation mechanism is explored. It is considered that continuous vertical compaction makes reservoir clastic particles from loose to close packing. Under the joint action of the late lateral extrusion and continuous vertical burial compaction, astatic microfracture and conjugated shear fracture are evident in the granules of quartz, feldspar, etc. The emergence of micro-cracks can strengthen particles corrosion resistance, and improve the reservoir permeability. Clearing burial compaction (mechanical)-lateral extrusion process of deep sandstone reservoir physical properties and reservoir properties of transformation mechanism possesses a positive role for the distribution of favorable reservoir evaluation and prediction.

Key words: deep reservoir, burial compaction, lateral extrusion, rock physical property, diagenetic physical modelling, Kuqa Depression

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