Fissure-cavern type reservoir connectivity quantitative analysis method and device
A quantitative analysis and connectivity technology, applied in earthwork drilling, wellbore/well components, etc., can solve problems such as strong multi-solutions and insufficient research on fracture connectivity, and achieve the effect of improving accuracy and reducing multi-solutions
Active Publication Date: 2015-08-05
PETROCHINA CO LTD
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Problems solved by technology
[0004] In view of the problems of multiple solutions in the background technology and insufficient in-depth research on fracture connectivity, the main purpose of the embodiments of the present invention is to provide a quantitative analysis method and device for fracture-cavity reservoir connectivity, so as to reduce the analysis results of reservoir and fracture distribution. Multi-solution, thus improving the accuracy of reservoir connectivity analysis
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0030] Embodiments of the present invention provide a method and device for quantitatively analyzing the connectivity of fracture-cavity reservoirs. The present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] The embodiment of the present invention provides a method for quantitative analysis of fracture-vug reservoir connectivity, such as figure 2As shown, the analysis method includes:
[0032] Step S101: perfo...
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The invention provides a fissure-cavern type reservoir connectivity quantitative analysis method and device. The method comprises the steps of utilizing seismic and logging data for carrying out inversion, obtaining a longitudinal wave impedance body, according to the relation between the well logging porosity and the longitudinal wave impedance, and generating a porosity cube; taking the lower limiting value of the effective reservoir porosity as the critical value to determine effective reservoirs; according to the contact relation between the effective reservoirs, judging the connectivity of the effective reservoirs, and determining the border of fissure and cave reservoirs; utilizing a coherent or curvature algorithm, extracting an initial seismic fissure prediction attribute; through a dynamic connectivity analysis method, determining the connectivity of an inter-well reservoir, and according to the borders of the fissure and cave reservoirs, judging the connectivity relation of the fissure and cave reservoirs; according to the connectivity relation, determining the fissure development degree, obtaining the threshold value range of the fissure attribute, and determining the seismic fissure prediction attribute; and according to the contact relation of the fissure and cave reservoirs and the seismic fissure prediction attribute, and the threshold value range of the fissure attribute, generating a reservoir connectivity quantitative analysis result.
Description
technical field [0001] The invention relates to reservoir distribution prediction technology, in particular to a quantitative analysis method and device for fracture-cavity reservoir connectivity. Background technique [0002] Fracture-cavity unit division is of great significance to the development of carbonate reservoirs, and the most critical issue is how to judge the connectivity between reservoirs. The dynamic connectivity analysis method can be used to determine the connectivity between wells, including reservoir pressure trend analysis method, interwell production interference analysis method, fluid property difference analysis method, interwell interference well test method and tracer method Wait. Reservoirs outside the control range of wells need to use seismic and other data to predict their connectivity. In view of the fact that the two main controlling factors affecting the connectivity of fracture-cavity reservoirs are the reservoir itself and fractures, the c...
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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 周俊峰潘建国马延会张虎权王宏斌孙东姚清洲房启飞代冬冬
Owner PETROCHINA CO LTD