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Paleopressure quantitative inversion detection method of oil reservoir

A detection method and oil reservoir technology, applied in earthwork drilling and production, wellbore/well components, etc.

Inactive Publication Date: 2014-08-13
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a detection method for fluid field pressure evolution in oil and gas reservoirs, especially to provide a quantitative inversion detection method for paleopressure in oil reservoirs, which solves how to quantitatively measure the formation pressure in the process of inversion of closed system uplift and denudation changes, and thus more accurately guide the positioning of optimal target areas for oil and gas exploration

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  • Paleopressure quantitative inversion detection method of oil reservoir
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  • Paleopressure quantitative inversion detection method of oil reservoir

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[0051] Such as figure 1 , figure 2 , image 3 , Figure 4 The paleopressure quantitative inversion detection method and its application of a kind of oil reservoir are shown, and the detection demonstration is carried out in a specific basin oil reservoir, and the paleopressure before the tectonic movement is calculated through the simulation of the burial history of the oil reservoir in this basin and the quantitative measurement of denudation thickness .

[0052] Such as figure 1 For the detection process, firstly, according to the test results of the core and fluid samples, the Poisson’s ratio ν of the rock is taken as 0.25, and the compressibility coefficient of the rock pore volume β r 26×10 -4 MPa -1 , the liquid compressibility coefficient β f 5×10 -4 MPa -1 , the liquid expansion coefficient α f 5×10 -4 K -1 , average formation density ρ r =2320kg / m 3 ; The denudation thickness of the Cretaceous in the basin was restored by using the vitrinite reflectance...

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Abstract

The invention discloses a paleopressure quantitative inversion detection method of an oil reservoir. The method comprises the following steps: detecting parameters of a core and a liquid sample at the oil reservoir; generating an erosion-thickness based oil reservoir burial history and geotemperature history simulation processed by a data device; then quantitatively detecting the paleopressure before tectonic movement. According to the paleopressure quantitative retrieval detection method of the oil reservoir, the pressure variation caused by tectonic uplift is acquired on the basis of actually-detected data and a liquid state equation and in light of strata burial history simulation and erosion thickness restoration, and the paleopressure of the oil reservoir before tectonic movement can be quantitatively inverted according to the current actually-detected oil reservoir pressure. With the adoption of the inversion method, the palaeozoic oil-gas migration-accumulation direction can be acquired to guide the selection of a better target region for oil-gas exploration, namely, the strata pressure of an adjacent area without being subjected to drilling exploration is forecasted and the drilling process is optimized according to the current oil reservoir pressure data of a drilled area, and thereby, the technical problems like diameter expansion of mudstone, collapse of well wall, and dead pressure at oil reservoir can be effectively handled.

Description

technical field [0001] The present invention relates to a detection method for fluid field pressure evolution in oil and gas reservoirs, in particular to a quantitative inversion detection method for paleo-pressure in oil reservoir reservoirs, that is, under the condition of known current formation pressure and its variation, the original formation pressure is inversely deduced method. Background technique [0002] The generation, migration, accumulation and preservation of oil and gas, and the interaction between diagenetic and ore-forming fluids are closely related to the pressure conditions and evolution of the basin. The study of medieval pressure in sedimentary basins has become an indispensable part of basin analysis and accumulation dynamics. The research on formation pressure evolution is becoming more and more important in the exploration of oil and gas resources. In recent years, the research on pressure tends to be more and more quantitative, and numerical simula...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 许浩喻廷旭尹微张文忠
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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