Shale gas yield prediction method based on micro-seismic-damage-seepage relationship
A production prediction and shale gas technology, applied in the fields of oil and gas engineering and rock engineering, can solve the problems of inaccurate shale gas production simulation results, achieve great application value, reduce prediction errors, and ensure the effect of accuracy
Pending Publication Date: 2021-12-14
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the problem of inaccurate simulation results of shale gas production in the prior art, and provide a shale gas production prediction method using the microseismic-damage-seepage relationship
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Embodiment 1
[0038] Step 1: Obtain shale cores at the target depth of the target well, test the permeability of shale cores at different depths, and obtain the relationship between permeability and damage variables;
[0039] Step 2: collect microseismic monitoring data of the target well, obtain microseismic source parameters, and obtain damage variables containing microseismic source parameters;
[0040] Step 3: Combine step 1 and step 2 to obtain the relationship between microseismic source parameters and permeability;
[0041] Step 4: Establish a geometric model of the shale gas reservoir. Based on the shale gas seepage model, combined with the relationship between microseismic source parameters and permeability and the geometric model of the shale reservoir, the numerical simulation method is used to solve the shale gas seepage model to obtain the target Well shale gas production.
[0042] In the actual exploration and development of shale, the damage of shale is a dynamic process. When...
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The invention discloses a shale gas yield prediction method by utilizing a micro-seismic-damage-seepage relationship, which comprises the following steps of: 1, collecting a shale core at a target depth, and testing the permeability of the shale cores at different depths to obtain a relational expression of the permeability and a damage variable; 2, collecting micro-seismic monitoring data, obtaining micro-seismic source parameters, and obtaining damage variables containing the micro-seismic source parameters; 3, obtaining the relationship between the micro-seismic source parameter and the permeability; and 4, establishing a shale reservoir geometric model, and solving the shale gas seepage model by adopting a numerical simulation method on the basis of the shale gas seepage model in combination with the micro-seismic source parameter and permeability relational expression and the shale reservoir geometric model to obtain the shale gas yield. According to the method, the reliability of input parameters during yield prediction is improved, the prediction error of the shale gas yield is greatly reduced, the accuracy of a yield prediction result is guaranteed, and the method has great application value for exploration and development of shale gas reservoirs.
Description
technical field [0001] The invention relates to the fields of oil and gas engineering and rock engineering, in particular to a method for predicting shale gas production using the microseismic-damage-seepage relationship. Background technique [0002] Underground rocks will produce micro-cracks when they are deformed under pressure. Rock mass failure is a continuous process of damage rupture, crack initiation, expansion and penetration until rupture. The energy accumulated in the rock mass itself will be released in the form of elastic waves. Microseismic monitoring technology As a three-dimensional space detection technology, it is used to characterize the dynamic damage characteristics inside the rock mass. Therefore, using on-site microseismic monitoring data to analyze the damage evolution of underground rock mass is an important research direction. Shale is a low-permeability tight sedimentary rock, and permeability is the main indicator of fluid seepage capacity in sh...
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IPC IPC(8): G06Q10/04G06F17/11G06Q50/02
CPCG06Q10/04G06Q50/02G06F17/11
Inventor 张伯虎王燕刘建军周逸陈思宏胡欣欣李鑫米欧胡尧彭朝波许倩
Owner SOUTHWEST PETROLEUM UNIV