Method and device for determining upper limit of physical properties of tight oil reservoirs
A technology for tight oil reservoirs and oil reservoirs, which is applied in the field of exploration and development of unconventional oil and gas reservoirs, and can solve problems such as complex operations and great interference from human factors
Active Publication Date: 2017-03-15
PETROCHINA CO LTD +1
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Problems solved by technology
Although scholars at home and abroad have proposed various methods on how to determine the boundary of physical properties, these methods can be divided into three categories, one is based on exploration and development experience, and this method is greatly disturbed by human factors; It is obtained from the statistics of typical tight oil reservoir data, and this method is complicated to operate; another method is realized by indirectly determining the permeability, first determine the oiliness, then determine the porosity, and finally determine the permeability
The ultimate goal of reservoir research is development, but unfortunately none of the above methods can directly and simply establish the connection between the upper limit of physical properties of tight reservoirs and effective development
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[0022] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the schematic embodiments and descriptions of the embodiments of the present application are used to explain the embodiments of the present application, but are not intended to limit the embodiments of the present application.
[0023] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0024] figure 1 It is a schematic flowchart of a method for determining the upper limit of physical properties of tight oil reservoirs according to an embodiment of the present application. Such as figure 1 As shown in , a method for determining the upper limit of physical properties of tight ...
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An embodiment of the invention provides a method and a device for determining the upper limit of physical properties of tight oil reservoirs. The method includes carrying out fine reservoir description on the target low-permeability oil reservoirs and acquiring fine geological models of the target low-permeability oil reservoirs; determining objective intervals in the target low-permeability oil reservoirs according to the fine geological models; acquiring air permeability and starting pressure gradient data of rock core samples in the objective intervals and generating relation curves of air permeability and starting pressure gradients; determining air permeability corresponding to abrupt change points in the relation curves. Preset conditions are met by the objective intervals. The abrupt change points are points with the maximum curvature in the relation curves. The method and the device in the embodiment of the invention have the advantages that the upper limit of the physical properties of the tight oil reservoirs can be quantitatively determined by the aid of the method and the device, and accordingly development modes can be scientifically and reasonably selected in operation sites under the guidance.
Description
technical field [0001] This application relates to the field of exploration and development of unconventional oil and gas reservoirs, in particular to a method and device for determining the upper limit of physical properties of tight oil reservoirs. Background technique [0002] Throughout the world, in the third major energy transformation trend from traditional oil and gas to new energy, unconventional oil and gas resources will undoubtedly become the most realistic resource type in this transformation. Tight oil is another hot spot in global unconventional oil and gas exploration and development after shale gas, and is called "black gold" by the oil industry. Although tight oil is a very realistic resource to replace oil, because the exploration and development of tight oil and related research are still in the preliminary stage, the overall degree of exploration and geological understanding is low, and there are still many problems that need to be discussed and solved i...
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 胡罡田选华刘大伟
Owner PETROCHINA CO LTD