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A Quantitative Characterization Method of Braided River Reservoir Architecture Units

A quantitative characterization and braided river technology, applied in the field of quantitative characterization of braided river reservoir architecture units, can solve the problem of insufficient coring data, difficulty in meeting the preconditions for the estimation of the average thickness of cross-strata groups, and the restriction of single-channel full-bank In-depth quantitative estimation and other issues to achieve the effect of easy access and loose application prospects

Active Publication Date: 2021-06-01
PETROCHINA CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0017] In addition, the lack of coring data and imaging logging data in mature oil and gas development areas have greatly restricted the quantitative estimation of the depth of the full bank of a single channel.
The lack of coring data, on the one hand, makes the thickness of interlaced formations measured directly from cores unrepresentative and statistically significant, on the other hand, it also limits the constraints and verification of calculation results based on well logging data
However, the lack of imaging logging data makes the quantitative estimation of the bank-fill depth of a single channel in the non-coring section lack basic data.
[0018] In general, the lack of core and imaging logging data in the development well area, coupled with the fact that the sedimentary characteristics of braided rivers are difficult to meet the preconditions for the estimation of the average thickness of cross-bed series, has resulted in the key parameters of the quantitative characterization method of architectural units based on the full bank depth of a single channel The acquisition is difficult and the reliability is doubtful, which leads to inaccurate quantitative characterization and spatial distribution prediction of the underground braided river reservoir architecture units, affecting the recovery rate and the potential of remaining resources

Method used

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  • A Quantitative Characterization Method of Braided River Reservoir Architecture Units
  • A Quantitative Characterization Method of Braided River Reservoir Architecture Units
  • A Quantitative Characterization Method of Braided River Reservoir Architecture Units

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Embodiment 1

[0057] This embodiment provides a quantitative characterization method for a braided river reservoir configuration unit, the reservoir configuration unit includes a braided channel and a composite channel in a single braided channel, including the following steps:

[0058] Step 1) Identify braided river reservoir architecture units according to the single well identification characteristics of channel banks and braided channels, draw a single-layer sand isopach map, and determine the planar distribution of braided channels in the same period;

[0059] Step 2) establishing a vertical braided channel well contrast section, and determining the boundary position between a single braided channel in a plurality of joint well contrast sections;

[0060] Step 3) Combining the single braided channel boundary between multiple well-connected comparison profiles, determining the plane distribution of the single braided channel in the single-layer sand body, and measuring the width of the s...

Embodiment 2

[0067] The braided river reservoir configuration unit quantitative characterization method provided by the present invention is used to analyze the 1-3 single-layer braided river gas reservoirs in the lower section of He 8 in Su X area.

[0068] The lower submember H of He 8 at the bottom of the Shihezi Formation in Su X area 8 The x sandstone is one of the most important reservoir sand bodies in this area. The lithology is mainly composed of medium-coarse lithic quartz sandstone and fine-medium lithic sandstone. The pore structure is composed of lithic dissolution pores and intercrystalline pores. Mainly secondary pores, with an average porosity of 9.6% and an average permeability of 0.71×10 -3 μm 2 , belonging to tight sandstone gas reservoirs with low porosity, low permeability and strong heterogeneity.

[0069] Subdivide box 8 lower subsection into H from top to bottom 8 x 1 and H 8 x 2 Two small layers and H 8 x 1-1 、H 8 x 1-2 、H 8 x 1-3 、H 8 x 2-1 、H 8 x ...

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Abstract

The present invention provides a quantitative characterization method for braided river reservoir architecture units, and proposes a configuration unit based on the width of a single braided channel by establishing a quantitative model of the relationship between the width of a single braided channel in a modern braided river and the architecture unit Quantitative characterization method, compared with the traditional quantitative characterization method of braided river reservoir architecture unit, its key parameter single braided channel width is easier to obtain and more reliable, so as to more accurately realize the braided river reservoir architecture unit The quantitative characterization and prediction of the spatial distribution of braided rivers have great guiding significance for the recovery factor and the tapping of the remaining resources, and the application prospects are more relaxed.

Description

technical field [0001] The invention belongs to the technical field of mineral resources exploitation, and in particular relates to a quantitative characterization method for braided river reservoir configuration units. Background technique [0002] The oil and gas reservoirs formed by braided river reservoirs play an important role in the world. The braided channels and channel sand bodies in braided river channels are the most important oil and gas reservoirs in braided rivers. Braided channels and channel sand bodies The body corresponds to the fourth-level configuration unit in Miall's reservoir configuration theory. Due to the continuous transformation and frequent channel migration in the braided river system, the internal structure of the sand bodies is complicated, and the physical properties of the sand bodies differ significantly. The heterogeneity among reservoir sand bodies seriously restricts the precise development of oil and gas fields, and the quantitative c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 张吉马志欣王文胜孙卫锋薛雯黄文芳白玉奇范倩倩孙艳辉
Owner PETROCHINA CO LTD
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