Topic
Effective porosity
About: Effective porosity is a research topic. Over the lifetime, 1199 publications have been published within this topic receiving 26511 citations.
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4 citations
TL;DR: In this article, the saturation height function was derived from pseudo capillary pressure curves generated using modern wells with complete log data, which was used to estimate hydrocarbon in some clastic reservoirs in the Niger Delta.
4 citations
Patent•
20 Mar 2013
TL;DR: In this paper, a method for quantitatively evaluating saturation of a complex oil and gas reservoir was proposed, where a calculation formula of a rock conductive hole porosity is deduced based on a Maxwell conduction equation; and in combination with a result of the electric petrophysical experiment of 12 rock properties, the relationship among cementation indexes and an effective porosity and a conductivehole porosity difference corresponding to the cementation index can be deduced, so that a high-precision calculation model of the cementing index in an Archie equation can be exactly established.
Abstract: The invention relates to a method for quantitatively evaluating saturation of a complex oil and gas reservoir. A calculation formula of a rock conductive hole porosity is deduced based on a Maxwell conduction equation; and in combination with a result of the electric petrophysical experiment of 12 rock properties, the relationship among cementation indexes and an effective porosity and a conductive hole porosity difference corresponding to the cementation index can be deduced, so that a high-precision calculation model of the cementation index in an Archie equation can be exactly established. According to the method, the relationship between the effective porosity and the conductive hole porosity is established, so that the calculation model of the cementation index can take the conductive hole porosity as a bridge to deduce a universality expression between the cementation index and the effective porosity in the Archie equation; and the method has strong universality, and can comprehensively reflect conductive mechanisms of the complex reservoir. The invention provides an effective method with high precision and strong universality for quantitatively evaluating the saturation of a complex porosity type reservoir by using the Archie equation; and the method can be widely used for quantitatively evaluating the saturation of various complex porosity type reservoirs.
4 citations
Patent•
29 Sep 2017
TL;DR: In this article, a tight reservoir sweetness evaluation method and device is presented, which includes the steps that according to logging information of multiple wells to be detected, the effective thickness, gas saturation, effective porosity and permeability of a reservoir to be extracted are acquired, wherein the well to be removed are formed in the reservoir and the brittleness index, natural fracture density, and mud content of the reservoir is acquired.
Abstract: The invention provides a tight reservoir sweetness evaluation method and device. The tight reservoir sweetness evaluation method includes the steps that according to logging information of multiple wells to be detected, the effective thickness, gas saturation, effective porosity and permeability of a reservoir to be detected are acquired, wherein the wells to be detected are formed in the reservoir to be detected; according to the logging information of the wells to be detected, the brittleness index, natural fracture density and mud content of the reservoir to be detected are acquired; the correlation degree of the effective thickness, gas saturation, effective porosity, permeability, brittleness index, natural fracture density and mud content of the reservoir to be detected is acquired; according to the correlation degree, the weight coefficients of the effective thickness, the gas saturation, the effective porosity, the permeability, the brittleness index, the natural fracture density and the mud content are acquired; according to the weight coefficients, the sweetness of the reservoir to be detected is determined. By means of the tight reservoir sweetness evaluation method and device, the geological characteristics of the tight reservoir can be comprehensively analyzed, and the accuracy of tight reservoir sweetness evaluation can be improved.
4 citations
25 Feb 2014
4 citations