Method for establishing oil/gas reservoir mode by integrating geological and geophysical information
A geophysical and gas reservoir technology, applied in the field of oil and natural gas exploration, can solve the problems of poor prediction effect between wells, large influence of human factors, lack of credible evidence, etc., to improve accuracy, avoid inaccurate or unreasonable Effect
Inactive Publication Date: 2019-02-22
XI'AN PETROLEUM UNIVERSITY
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[0003] However, the downhole geological data has the defects of vertical and horizontal discontinuity, and the geophysical data is also ambiguous due to the influence of the signal-to-noise ratio and resolution of the seismic data.
Only using geological data to compile oil / gas reservoir profiles lacks credible evidence between wells or areas without wells; at the same time, migration pathways such as sand body connectivity, faults, or unconformities can only be estimated or early geological understanding, and cross-well prediction poor effect
Although seismic reflection features, seismic attributes, and seismic inversion can be used to provide information on the development of sand bodies, reservoirs, and faults, due to the quality of seismic data and the diversity and complexity of geological models, seismic interpretation results are inconsistent. Therefore, the results of seismic interpretation cannot be simply used for compiling oil / gas reservoir profiles
Relying solely on drilling data cannot accurately reveal geological elements such as sand body superimposition patterns and connectivity, fractures, and unconformity surfaces. Interwells and areas without wells can only be speculated, which are greatly affected by human factors. Therefore, a comprehensive geological and Method of Establishing Oil / Gas Reservoir Model Based on Geophysical Information
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Embodiment
[0034] Embodiment: comprise the steps:
[0035] (1) Establish I-II-III-IV-V well-connected sections and corresponding seismic sections ( figure 1 (a) and figure 1 (b)), the well-connected profile has included information data such as gas layers, water layers and gas-bearing water layers of each well. Among the 5 wells in this profile, the top sand body of the target layer in Well I is a gas layer, and the other sandstone sections in this well are gas-bearing water layers or water layers. Although thick sand bodies are developed in Well II, they are generally water layers. The gas-bearing properties of the 3 wells IV and V are all good. What type of sand bodies are developed among the 5 wells, whether the sand bodies are connected, how are the gas-bearing properties of the sand bodies among the 5 wells, and whether the gas-bearing properties of I and II are poor because they are located at the structural low or because the sand bodies are not connected These issues need to b...
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The invention discloses a method for establishing an oil / gas reservoir mode by integrating geological and geophysical information and relates to the technical field of oil and natural gas exploration.Geological data, seismic interpretation, seismic forward modeling and seismic inverse modeling are organically integrated instead of simply using a result obtained by the methods of seismic interpretation, seismic inverse modeling and the like to perform cross-well comparison, limited geological data and seismic reflection data are integrated, the seismic forward modeling research is developed, ageological model that matches a seismic reflection whole body is established, an inaccurate or unreasonable cross-well prediction result possibly caused by a multi-solution property of the seismic data is avoided, therefore, a more reasonable oil / gas reservoir profile is established, the accuracy of the oil / gas reservoir profile is improved, and the deployment of later well location is guided well.
Description
technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration, in particular to a method for establishing an oil / gas reservoir model by integrating geological and geophysical information. Background technique [0002] Compilation of oil / gas reservoir profiles is a key link in the analysis of oil / gas reservoir types, genesis, and distribution of oil and gas, and is the basis for establishing oil and gas accumulation models. Due to the limitations of data availability, differences in the study area, and technical means of researchers, etc., in the process of compiling oil / gas reservoir profiles, it is basically based on known drilling data. Well, oil / gas testing, logging interpretation and actual production data mark the oil and gas intervals in the well-tie sand body profile, and finally form the oil / gas reservoir profile. [0003] However, the downhole geological data has the defects of vertical and horizontal discontinuity, an...
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Login to View More IPC IPC(8): G01V1/50G01V1/30
CPCG01V1/306G01V1/50G01V2210/624
Inventor 耳闯
Owner XI'AN PETROLEUM UNIVERSITY