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Geological modeling method for horizontal wells in ultra-low permeability tight reservoirs

A tight reservoir and geological modeling technology, applied in 3D modeling, image data processing, special data processing applications, etc., to achieve the effect of improving accuracy

Active Publication Date: 2015-07-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the existing reservoir geological modeling method cannot fully reflect the change law of the internal physical properties of the sand body reservoir

Method used

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  • Geological modeling method for horizontal wells in ultra-low permeability tight reservoirs
  • Geological modeling method for horizontal wells in ultra-low permeability tight reservoirs
  • Geological modeling method for horizontal wells in ultra-low permeability tight reservoirs

Examples

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Embodiment 1

[0050] In order to overcome the problem that the existing reservoir geological modeling methods cannot fully reflect the change law of the internal physical properties of sand body reservoirs, such asfigure 1 As shown, this embodiment provides a geological modeling method for horizontal wells in ultra-low permeability tight reservoirs, including the following steps:

[0051] 1) Collect well information data, single well logging data, well point stratification data and sedimentary microfacies data of the horizontal section of the horizontal well, perform logging data correction, core correction and core homing on the horizontal section of the horizontal well, and determine ultra-low Reservoir parameters in the horizontal section of a horizontal well in a permeable reservoir.

[0052] Among them, the well information data includes well name, X coordinate, Y coordinate and elevation of core; single well logging data includes porosity, permeability and water saturation; well point ...

Embodiment 2

[0074] The Chang 6 oil reservoir in the Yuan 427 horizontal well area of ​​the ultra-low permeability oil reservoir is located in the south of the slope of the Ordos sedimentary basin in northern Shaanxi. 3 It belongs to lake subaqueous fan deposits. The distribution of sand bodies is mainly controlled by braided channel microfacies, followed by channel fronts, interchannels and channels. The average porosity is 11.7%, the average permeability is 0.34mD, and the effective thickness is 19.7m.

[0075] In this example, on the basis of Example 1, the ultra-low permeability tight reservoir horizontal well geological modeling method of the present invention is adopted for the Yuan 427 horizontal well area of ​​the ultra-low permeability reservoir. In the process of establishing the structural model, the horizontal well data are used Control the structural layer, and adjust the microstructure between the control points under the constraints of the horizontal well trajectory.

[0076...

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Abstract

The invention provides a geological modeling method for horizontal wells in ultra-low permeability tight reservoirs, which includes the following steps: (1) the well information data, single-well logging data, well point layer data and sedimentary microfacies data of the horizontal section of a horizontal well are acquired, and the reservoir stratum parameters of the horizontal section of the horizontal well are determined; (2) vertical wells are added on the horizontal section of the horizontal well to control the horizontal section structure, so that an initial structure model is obtained; (3) a reservoir facies model is created by utilizing the sedimentary microfacies data and in combination with geological knowledge and achievements; (4) the reservoir stratum parameters of the horizontal section of the horizontal well are utilized for analysis, and a reservoir property model is created; (5) the actual locus profiles, production performance and numerical simulation of the horizontal well are applied to verify the geological models, so that a three-dimensional geological model of an exploitation area of the horizontal well is obtained. The method provides a data source for the research on the characteristics of the planar distribution of sand, accurately describes the planar distribution trend and vertical facies distribution trend of a reservoir stratum, increases the precision of the prediction model, and lays a foundation for the optimization of an ultra-low permeability oil reservoir exploitation technology policy and fine injection and production adjustment.

Description

technical field [0001] The invention specifically relates to a geological modeling method for horizontal wells in ultra-low permeability tight reservoirs. Background technique [0002] Reservoir modeling method is a high-tech developed rapidly in recent years. It comprehensively utilizes various geological, seismic, logging and production dynamic data, and uses geostatistical methods to conduct cross-well prediction of various reservoir parameters. , to establish a quantitative and accurate 3D visualization reservoir model is an important part of the current reservoir description work. Reservoir modeling methods can quantitatively characterize and describe reservoir heterogeneity, so as to study the uncertainty and investment risk in oil and gas exploration and development. [0003] As the physical properties of ultra-low permeability reservoirs are getting worse and worse, it is becoming more and more difficult for traditional directional wells to further increase single w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/05
Inventor 樊建明屈雪峰雷启鸿李卫兵田冷王选茹杨子清陈文龙
Owner PETROCHINA CO LTD
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