Reserve estimation method for fracture-cavity bottom water reservoir

A bottom-water reservoir and fracture-cavity technology, applied in the field of reservoir estimation, can solve problems such as reserve estimation errors and inaccurate models, and achieve high returns, wide applicability, and improved development efficiency

Active Publication Date: 2016-11-09
恒泰艾普(北京)能源科技研究院有限公司
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Problems solved by technology

The analogy method is generally used in the oil and gas reservoir identification stage. The calculation of reserves by the probabilistic method is to quantify the uncertainty of independent variables and give the probability distribution of reserves. It is a risk analysis method, which mainly relies on geological modeling techniques, especially Due to strong heterogeneity in the modeling of fractured-cavity carbonate reservoirs, the model is inaccurate, there are many uncertainties in the selection of reservoir parameters, and there are large errors in reserve estimation

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  • Reserve estimation method for fracture-cavity bottom water reservoir
  • Reserve estimation method for fracture-cavity bottom water reservoir
  • Reserve estimation method for fracture-cavity bottom water reservoir

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Embodiment Construction

[0031] The method for estimating the reserves of the fractured-cavity bottom water reservoir of the present invention comprises the following steps:

[0032] S01: Calculate the total volume V of the geological body of the reservoir by using the oil-water contact, structural map, and oil-bearing area of ​​the fractured-vuggy bottom water reservoir t ; Generally, the fractured-cavity reservoir comprehensive description software LD-EPoffice can be used TM FRS+ implementation;

[0033] S02: Using the results of well logging FMI imaging interpretation, complete the division of Type I fracture-vuggy reservoirs, Type II fracture-vuggy reservoirs, and the effective porosity of each fracture-vuggy reservoir, and combine well-seismic calibration to establish relationships with seismic fracture-vuggy attributes to determine fracture-vuggy reservoirs. The upper and lower limits of cave reservoirs provide judgment basis for fracture-vuggy body characterization;

[0034] S03: Use 3D visu...

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Abstract

The invention relates to a geologic survey method and aims to provide a reserve estimation method for a fracture-cavity bottom water reservoir, and the method is wide in application range and relatively small in estimation error. The method comprises the following steps of S01: calculating the total volume Vt of a reservoir geologic body; S02: finishing division of a type-I fracture-cavity reservoir, a type-II fracture-cavity reservoir and effective porosity of each fracture cavity, establishing a relationship with a fracture-cavity attribute of an earthquake in combination with well-to-seismic calibration, and determining upper and lower limits of the fracture-cavity reservoir; S03: performing hollowing description on different levels of fracture-cavity reservoirs to obtain the volume VI of the level-I fracture-cavity reservoir and the volume VII of the level-II fracture-cavity reservoir; S04: calculating the volume of a type-III fracture-cavity reservoir; S05: obtaining effective porosity values of the different levels of the fracture-cavity reservoirs; S06: calculating geologic reserves of the different levels of the fracture-cavity reservoirs; and S07: calculating the total reserve of the reservoir geologic body.

Description

technical field [0001] The invention relates to a geological testing method, in particular to a reservoir estimation method. Background technique [0002] Carbonate fracture-vuggy reservoirs have extremely complex pore structures, there are no fixed horizons in the vertical direction, and the lateral heterogeneity of the reservoirs is strong, making it difficult to compare between wells; And the scale varies greatly, it is difficult to delineate its area range. In view of these two reasons, it is difficult to estimate the volume of carbonate reservoirs today. [0003] At present, the commonly used reservoir reserve calculation methods can be roughly divided into four categories, namely, volumetric method, dynamic method, analogy method and probability method. The result is very wrong. The dynamic method of reserve estimation should pay more attention to whether the reserve parameters conform to the characteristics of reservoir development, mainly including material balanc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 王立华邱津庞惠华李梅汤金彪
Owner 恒泰艾普(北京)能源科技研究院有限公司
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