Characteristics and controlling factors of tight sandstone reservoir of the third member of Shahejie Formation in the southern West Depression, Liaohe Basin
Online published: 2013-11-26
By means of observation of core samples, casting thin sections and ordinary thin sections, combined with recording, logging data, scanning electronic microscope and clay mineral X-ray diffraction analysis, this paper studied the petrology characteristics and physical properties of the tight sandstone reservoir of the third member of Shahejie Formation in the southern West Depression, and analyzed the main influencing factors for reservoir properties. The result shows that the reservoir rock is composed of tight sandstone with lowto ultra-lowporosity and lowto ultra-lowpermeability; with lithic and feldspar as its main components, the detrital grain has low compositional maturity; grain contacts are mainly line contact and point-line contact; porosity and permeability are different in the vertical and the horizontal sections of the reservoirs, and the reservoir heterogeneity is strong; the main factors that affect the reservoir properties are source, sedimentation, diagenesis, depositional systems, tectonism and abnormal pressure. The analysis of the dominant factors of the physical properties of tight sandstone reservoir can provide basis for the prediction and evaluation of high-quality tight sandstone reservoirs and exploration and development of tight sandstone gas reservoirs
LIU Tong , REN Guirong , ZHAO Ronghuai . Characteristics and controlling factors of tight sandstone reservoir of the third member of Shahejie Formation in the southern West Depression, Liaohe Basin[J]. Lithologic Reservoirs, 2013 , 25(6) : 53 -61 . DOI: 10.3969/j.issn.1673-8926.2013.06.010
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