Establishment method of new saturation model of water-flooded zone based on digital core
A digital core and water-flooded layer technology, applied in the field of establishment of water-flooded layer saturation model, can solve the problems of low saturation calculation accuracy and large difference
Active Publication Date: 2021-09-14
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology
[0014] The purpose of the present invention is to solve the problem that the water flooding mechanism of the current water flooded zone saturation model is quite different from the actual conditions, and the calculation accuracy of the saturation is low. The method of establishing a new saturation model of the water-flooded layer based on digital cores can provide a powerful help for reservoir evaluation.
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[0066] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0067] The construction steps of the new saturation model of the water-flooded zone based on the digital core are as follows:
[0068] The first step is to establish a new equivalent water-flooded layer rock volume physical model.
[0069] Such as figure 1 Shown is the physical model of the rock volume of the new equivalent water-flooded layer, including five parts: rock skeleton, remaining oil, bound water in large-pore membranes, bound water in small pores, and injected water in pores.
[0070] The second step is to construct the digital core of the flooded layer.
[0071] The particle size data and mercury injection data of the water-flooded layer cores were collected. The porosity of the conventional core analysis was 36.07%, and the permeability was 1189.10mD. The sedimentary process was constrained according to the pore and permeability parame...
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The invention discloses a method for establishing a new saturation model of a water-flooded layer based on a digital rock core. Firstly, according to the fact that the injected water first contacts with the bound water of the film on the surface of the large pores, and then contacts with the bound water of the small pores, the bound water of the large-pore film and the water of the small pores are given. The progressively mixed water-flooded layer rock volume physical model of small pore bound water, and then construct the digital core of the water-flooded layer, analyze the water-flooded mechanism based on the digital core technology, obtain the electrical property law under different injected water salinity, and draw different The calculation formula of electrical properties under the salinity of injected water is used to finally build a new saturation model of the water-flooded layer. The invention can obtain the electrical property law under different salinity of injected water, can obtain more accurate logging interpretation of water-flooded layer saturation, and provides powerful help for reservoir evaluation.
Description
technical field [0001] The invention relates to a saturation evaluation method in the well logging field of the petroleum exploration and development industry, in particular to a method for establishing a new water-flooded layer saturation model. Background technique [0002] Logging saturation evaluation of water flooded zone is an important technology in the process of oilfield development. How to provide reliable logging saturation interpretation conclusion has always been a difficult problem for logging analysts to explore and solve. However, the complexity of water flooding conditions under different geological conditions increases the difficulty of logging saturation evaluation. The complex situation of flooding affects the design, implementation and development effect of decision-makers' mining schemes to a certain extent. Therefore, it is necessary to carry out logging saturation interpretation research in water-flooded zones and establish a saturation model that is...
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IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/00Y02A10/40
Inventor 张晋言孙建孟郝曙嫣闫伟超戴为民黄新平刘云兰
Owner CHINA PETROCHEMICAL CORP