Characteristics and controlling factors of E1+2 clastic reservoir in Qie 6 block of Kunbei Oilfield in Qaidam Basin
Online published: 2011-08-20
Based on the data of sections, cores, scanning electron microscope, mercury penetration and physical properties, the characteristics and controlling factors in Qie 6 block of Kunbei Oilfield in Qaidam Basin are systematically studied. The result shows that the clastic rocks are mainly arkose, lithic arkose and feldspathic litharenite with lowcompositional maturity and moderate-high textural maturity. The primary intergranular pores are the main reservoir spaces. The pore structure is characterized by high displacement pressure, small pore throat radius, poor connection and poor sorting. As low-porosity and low-permeability reservoir, it is mostly controlled by sedimentary microfacies and diagenesis such as compaction, cementation and dissolution, amongwhich compaction dominates when the depth increases to some extent.
Key words： outcrop section; Yanchang Formation; sandstone component; Ordos Basin
HE Jing , FENG Shengbin , YUAN Xiaoqi , HAN Peng , XIE Guwei , ZHANG Caili . Characteristics and controlling factors of E1+2 clastic reservoir in Qie 6 block of Kunbei Oilfield in Qaidam Basin[J]. Lithologic Reservoirs, 2011 , 23(4) : 75 -80 . DOI: 10.3969/j.issn.1673-8926.2011.04.013
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