Simulation method and device of artificial fracture
A technology for artificial fractures and fractures, which is applied in the field of artificial fracture simulation methods and devices, and can solve problems such as inability to accurately characterize hydraulic fracturing fracture networks.
Active Publication Date: 2018-12-28
PETROCHINA CO LTD
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Problems solved by technology
[0005] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a method for determining the density of artificial fracture development and simulating the distribution of artificial fractures, so as to solve the problem that the prior art cannot accurately characterize the hydraulic fracturing fracture network
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[0044] Embodiments of the present invention provide a method and device for simulating artificial cracks. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0045] Such as figure 1 Shown is a flow chart of a method for simulating artificial fractures according to an embodiment of the present invention. The method shown in the figure includes: step S1, performing data class...
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The invention provides a simulation method and device of an artificial fracture. The method comprises the following steps: performing data classification and time-space path analysis on obtained microseism events, constructing a fracture propagation path network; constructing a fracture density body and a fracture distribution range according to the fracture propagation path network; determining afracture combination type and geometrical parameters according to a stress state type and a fracture criterion; performing stochastic simulation by using the fracture density body and the fracture distribution range as constrains in combination with the stress state type and the fracture criterion to generate an artificial fracture discrete fracture network; and generating an artificial fractureattribute parameter field in combination with the obtained hydrofracture construction data and reservoir development dynamic data. According to the simulation method and device provided by the invention, on the basis of microseism monitoring data, and in combination with the regional geological information, fracture construction information and reservoir development dynamics and other data, a fracture discrete fracture network model meeting the fracture construction information and an artificial fracture expansion mechanism is established, and the anisotropism and complexity of a hydrofracturefracture network can be characterized.
Description
technical field [0001] The invention relates to the field of exploration and development of petroleum and natural gas fields, in particular to a method and device for simulating artificial fractures. Background technique [0002] With the development of unconventional oil and gas reservoirs such as tight oil and shale gas, the grade of oil and gas reservoirs is getting worse and worse. With the advancement of artificial fracturing, artificial fracturing is developing rapidly in the direction of large-scale fracturing, steering fracturing, and volume fracturing. The fracture network formed by artificial fracturing is becoming more and more complex. Conventional fracture models are no longer suitable for complex fractures formed by artificial fracturing. network. [0003] The research methods of artificial fractures can be divided into the following types: 1) indirect method, using methods such as well testing and production performance fitting to obtain approximately equival...
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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 龙国清田昌炳李保柱侯建峰秦勇许磊
Owner PETROCHINA CO LTD