The Analysis of Controlling Factors on Sandstone Diagenesis and Porosity Preservation of Lower Juarassic in Tugerming Anticline,Kuqa Forland Basin

Key words: 
• sandstone diagengsis

Abstract: The article studies on controlling factors of lower Juarassic sandstone diagenesis and porosity preservation in Tugerming Anticline of Kuqa foreland basin from the geological backgrounds of deposit, structure and themal current,and suggests that sandstone granular diameter, themal maturation and structure stress are three main controlling factors of sandstone diagengsis and porosity preservation.But the front two controlling factors are not important ones which resulted in the smaller sandstone compaction and more pore preservation in the southern wing of Tugerming anticline,and stronger sandstone compaction and smaller pore preservation in northern wing of Tugerming anticline. Further research shows that it was the Paleostructure stress that produced the most important effect on sandstone compaction and pore preservation because there was 72.2 MPa Paleotectonic stress differential tested by AE acoustic emission which could decreased 7.6 % of sandstone porosity between the northern and southern wing.