A method for analyzing 3d permeability evolution history of sandstone reservoirs

An analysis method and permeability technology, which is applied in the analysis field of 3D permeability evolution history of sandstone reservoirs, can solve the problems that cannot meet the needs of exploration and development of low permeability-tight sandstone reservoirs, and do not take into account the 3D permeability evolution history, etc.

Inactive Publication Date: 2020-03-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] However, for strongly heterogeneous low-permeability-tight sandstone reservoirs, previous scholars used one or several points on the well to represent the overall reservoir quality of the target interval, without considering the 3D permeability evolution history of different lithofacies types; There are few reports on the research methods of 3D permeability evolution history of strongly heterogeneous low permeability-tight sandstone reservoirs
Based on the status quo and existing problems in the field of diagenetic numerical simulation research, the existing technology cannot meet the current needs of exploration and development of low-permeability-tight sandstone reservoirs

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  • A method for analyzing 3d permeability evolution history of sandstone reservoirs
  • A method for analyzing 3d permeability evolution history of sandstone reservoirs
  • A method for analyzing 3d permeability evolution history of sandstone reservoirs

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Embodiment 1

[0041] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, a method for analyzing the 3D permeability evolution history of sandstone reservoirs includes the following steps:

[0042] Step 1), well location selection: based on the exploratory wells in the study area, establish a planar well location grid based on the exploration data in the study area, which should better reflect structural changes based on the richness of existing data in the study area range;

[0043] Step 2), organize data: collect data such as mud logging, well logging, seismic and analysis and testing of the target interval in the overall study area; wherein, the logging data includes neutron, acoustic time difference, natural gamma ray, resistivity, spontaneous potential and density 6 kinds of well logging curves; seismic d...

Embodiment 2

[0071] Embodiment 2: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the purpose of the embodiments of the present invention is to provide a method for analyzing the 3D permeability evolution history of sandstone reservoirs, aiming at solving the exploration and development requirements of strongly heterogeneous, low-permeability-tight sandstone reservoirs.

[0072] The embodiment of the present invention is achieved in this way, a method for analyzing the 3D permeability evolution history of sandstone reservoirs, based on different lithofacies types and their percentages in the target interval, and based on sandstone internal factors to establish different lithofacies types close to geological reality A 3D permeability evaluation method for low-permeability-tight sandstone reservoirs combined with 3D per...

Embodiment 3

[0075] Embodiment 3: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, an analysis method for the 3D permeability evolution history of sandstone reservoirs, based on the sandstone structure and sandstone components, establishes different lithofacies types that are close to the geological reality, evaluates different lithofacies types by logging, and adopts weighted calculation method according to their percentage content. and an analysis method for evaluating the overall 3D permeability of the target interval, providing a set of detailed 3D permeability evaluation procedures ( figure 1 ), including the following steps:

[0076] (1) Well location selection: Based on the exploratory wells in the target interval of the XX Sag in the XX Basin, a planar well location grid based on the exploration data in the st...

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Abstract

The invention, which belongs to the field of studying of the diagenetic numerical value simulation technology of the low-permeability-tight reservoirs, provides an analytical method for the evolutionhistory of 3D permeability of a sandstone reservoir. The method comprises the following steps that: well selection and data arrangement are carried out; a rock physics model including six types of lithofacies of coarse sandstone, medium sandstone, fine sandstone, siltstone, chiltern conglomerate and mudstone is established in a low-permeability-tight reservoir, and distribution of the six types oflithofacies at a target segment is evaluated by using combined scales of six kinds of welllogging curves; on the basis of a sandstone particle size, a rock density, and mineral constituents, six lithofacies types approximating geological actual situation are made; a porosity-depth and porosity- permeability mathematical equation based on magnetic resonance imaging and reservoir physical data is implanted and thus a 3D permeability evolution history of the six lithofacies types at the target segment is reproduced under the 3D burial history and thermal history constraints; and an overall 3D permeability evolution history of the target segment is evaluated by combining the percentage compositions of the six lithofacies types. Moreover, the consistency analysis of a practically measured permeability value and a simulated permeability value is carried out.

Description

technical field [0001] The invention relates to an analysis method for 3D permeability evolution history of sandstone reservoirs, belonging to the research field of diagenetic numerical simulation technology of low-permeability-tight reservoirs. Background technique [0002] In the past, when evaluating the quality of conventional sandstone reservoirs, porosity was generally used as the main index to determine the classification index for effective reservoir research. However, for tight sandstone reservoirs with strong heterogeneity and low permeability, the results of reservoir evaluation using porosity indicators are usually quite different from the actual production conditions. Therefore, it is very necessary to conduct in-depth research on the permeability evaluation method of low-permeability-tight sandstone reservoirs to provide a more effective basic evaluation index that can reflect the quality of low-permeability-tight sandstone reservoirs. [0003] The research on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 林承焰王文广黄导武张宪国段冬平黄鑫董春梅任丽华刘彬彬林建力刘玉从
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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