Influence of diagenesis on reservoir properties in northern Ordos Basin
Online published: 2014-10-20
Based on analysis of conventional thin section, casting thin section, scanning electron microscope, cathodeluminescence and X-ray, this paper studied the reservoir diagenesis and its influence on reservoir properties of He 8 member in northern Ordos Basin. The result shows that because of the influence of diagenetic material and energy, pore types in the western zone are different from the pore types in the eastern zone of northern Ordos Basin. There are mainly intergranular dissolved pores and lithic dissolved pores in the western zone, whereas lithic dissolved pores and intercrystalline pores in the eastern zone. Besides, diagenetic facies can be divided into four types, among which the combination of siliceous cement phase and calcium dissolved phase is the favorable one. Reservoir properties are influenced by diagenesis, which displays that the cementation tighten reservoir and dissolution improved reservoir properties. Further research on reservoir diagenesis can provide theoretical foundation for the optimization of abundant gas accumulation zone and promotion of gas reservoir exploration and production in the northern Ordos Basin
WANG Xinjie , TANG Hai , SHE Long , ZOU Guili , ZHOU Jubiao , LI Xiangzhu . Influence of diagenesis on reservoir properties in northern Ordos Basin[J]. Lithologic Reservoirs, 2014 , 26(5) : 51 -56 . DOI: 10.3969/j.issn.1673-8926.2014.05.010
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