Interlayer fine depictiing method under reservoir configuration constraint and interlayer embedded modeling method under reservoir configuration constraint

A technology of interlayers and reservoirs, applied in the field of fine characterization of interlayers and embedded modeling, which can solve problems such as incomplete numerical simulation results, inaccuracy, and loss of interlayer information

Pending Publication Date: 2020-12-08
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention provides a method for finely describing interlayers under the constraint of reservoir configuration, which can effectively solve the problems of lost or incomplete information on interlayers and inaccurate numerical simulation res

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  • Interlayer fine depictiing method under reservoir configuration constraint and interlayer embedded modeling method under reservoir configuration constraint
  • Interlayer fine depictiing method under reservoir configuration constraint and interlayer embedded modeling method under reservoir configuration constraint
  • Interlayer fine depictiing method under reservoir configuration constraint and interlayer embedded modeling method under reservoir configuration constraint

Examples

Experimental program
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Example Embodiment

[0046] Example 1

[0047] A fine characterization method of interlayer under the constraint of reservoir configuration includes the following steps:

[0048] (1) Identification of different levels of reservoir configuration interface by using core facies and logging facies: Identification and interpretation of different levels of reservoir configuration interface in single well vertically by using core facies data, including argillaceous interlayer and calcareous interlayer, argillaceous interlayer and calcareous interlayer. By establishing the corresponding relationship between core facies and logging facies, the interpretation mode of single well vertical logging configuration interface is established, and the identification and interpretation of different levels of reservoir configuration interface in non-coring wells are carried out by using this interpretation mode; Among them, the logging response characteristics of the argillaceous interlayer are as follows: the spontaneous...

Example Embodiment

[0061] Example 2

[0062] An embedded modeling method of interlayer under the constraint of reservoir configuration, the flow diagram of which is shown in Figure 3. Figure 1 Comprises the following steps:

[0063] (1) Establishment of reservoir interlayer and interlayer model:

[0064] (11) Establishment of reservoir interlayer model:

[0065] (111) based on the corresponding depth and thickness data of the interlayer obtained in step (4) in the above-mentioned embodiment 1, establish the trend surface model of the top and bottom of the interlayer;

[0066] (112) in structural modeling, the trend surface models of the top and bottom of the interlayer in step (111) are directly used to establish the structural model of the interlayer;

[0067] (113) In the process of facies modeling, the interlayer facies model is established by assigning values, and both the interlayer facies model and the attribute parameter model are assigned values of "0", and the grid system is vertically provi...

Example Embodiment

[0075] Example 3

[0076] This embodiment takes Block S in Fuxian area of Yanchang Oilfield in the south of Ordos Basin as an example to specifically analyze and explain the invention. The study area is located in the south of Ordos Basin, and the internal structure of the block is simple, with a west dip monoclinic and no fault development. The main target layer in the study area is Yanchang Chang 8 oil reservoir group, and the main sedimentary background is delta front and pre-delta subfacies, and three microfacies, namely underwater distributary channel, underwater distributary channel and pre-delta mud, are mainly developed. Main layer length 8 2 The lithology of the small layer is mainly fine sandstone, followed by fine siltstone, the particles are mostly prismatic-sub-round, the debris is severely weathered, the sorting and rounding are moderate, and the point-line contact occurs, with an average porosity of 9.76%. The average effective permeability is 0.35×10. -3 μm 2 The a...

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Abstract

The invention discloses an interlayer fine depicting method under reservoir configuration constraint. The interlayer fine depicting method comprises the following steps: (1) identifying reservoir configuration interfaces at different levels by utilizing a core facies and a log facies; (2) predicting reservoir configuration interfaces at different levels by utilizing a geological deposition mode, horizontal well drilling, oil-water well production dynamics and test data; (3) classifying and combining reservoir configuration interfaces at different levels; (4) carrying out quantitative characterization on spatial distribution characteristics of the reservoir configuration interfaces at different levels, wherein the reservoir configuration interfaces at different levels comprise corresponding4-level and 5-level reservoir configuration interfaces under different sedimentary microfacies. In addition, according to the data determined by the interlayer fine depicting method, the invention further discloses an interlayer embedded modeling method under the reservoir configuration constraint, which can achieve complete reservation of interlayer information after coarsening of a reservoir model, and has important guiding significance for later-period oil reservoir numerical simulation research on remaining oil distribution characteristics.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to a method for finely depicting interlayers and embedded modeling under the constraint of reservoir configuration. Background technique [0002] During oilfield development, interlayers have an important influence on oil and gas seepage, which controls the seepage of fluid in the reservoir and the distribution of remaining oil, which has become the focus of fine geological research; 3D reservoir geological modeling is a current technology Mature 3D visualization reservoir characterization technology, which can display the development law of the reservoir interlayer model in 3D, is useful for guiding the analysis of the effect of injection-production well groups in the fine development of water injection, horizontal well geosteering adjustment while drilling, and local remaining oil Issues such as distribution research, low d...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06T17/05G01V99/00E21B49/00G06F111/04G06F111/10
CPCG06F30/20G06T17/05G01V99/005E21B49/00G06F2111/04G06F2111/10
Inventor 梁卫卫赵习森刘滨党海龙蔺建武张亮杨江石彬王振宇张天龙曹玉珊张佳琪李留杰凃兴平李东
Owner SHAANXI YANCHANG PETROLEUM GRP
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