Production profile prediction model of fractured marine-terrestrial transitional facies shale gas horizontal wells considering SRV heterogeneity between different sections

被引：0
|
作者：
Wei M. [1 ,2 ]
Wang H. [1 ]
Duan Y. [1 ]
Chen H. [1 ]
Li X. [3 ]
Yang H. [3 ]
Sun Y. [4 ]
Duan X. [5 ]
机构：
[1] Petroleum Engineering School, Southwest Petroleum University, Sichuan, Chengdu
[2] Sichuan Shale Gas Industry Development Research Institute, Sichuan, Chengdu
[3] PetroChina Coalbed Methane Co., Ltd., Beijing
[4] PetroChina Research Institute of Petroleum Exploration & Development, Beijing
[5] Shale Gas Research Institute, PetroChina Southwest Oil & Gasfield Company, Sichuan, Chengdu
来源：
Natural Gas Industry | 2023年 / 43卷 / 08期
关键词：
Fractured horizontal well; Gas production profile; Heterogeneity; Marine-continental transitional facies; Prediction model; Productivity; Shale gas;
D O I：
10.3787/j.issn.1000-0976.2023.08.007
中图分类号：
学科分类号：
摘要：
After a horizontal well is fractured, it is necessary to accurately understand its sectional production contribution, flowback laws and bottom hole production performance, which is the basis for judging fraturing effetiveness and improving design pertinence, and it of important significance to gas well productivity increase and the realization of cost reduction and efficiency improvement. In view of the heterogeneity of long horizontal wells in marine-continental transitional shale gas and the stimulation degree difference between different sections caused by differential simulation, this paper establishes a production profile prediction model of fractured horizontal well with five-zone transient linear flow considering shale reservoir heterogeneity and SRV and stimulation degree differences between different sections. The production rate of the In view of the heterogeneity of long horizontal wells in marine-continental transitional shale gas and the stimulation degree difference between different sections caused by differential simulation, this paper establishes a production profile prediction model of fractured horizontal well with five-zone transient linear flow based on shale reservoir heterogeneity and SRV and stimulation degree differences between different sections. The production rate of the gas well and the production contribution curve of each fracturing section are obtained by using the modern mathematical physics method and the Stehfest numerical inversion method. In addition, the gas production laws of each section and their influential factors are analyzed. The following research results are obtained. First, the double logarithmic pressure drop, productivity decline and production contribution curve of each section can be divided into five flow stages: fracture linear flow, fracture transformation zone flow, transformation zone outer flow, quasi radial flow and boundary control flow. Second, the permeability and area of the transformation zone have a positive correlation with the production contribution rate of the fracture linear flow stage and the fracture transformation zone flow stage. Third, the increase of permeability outside the transformation zone increases the production contribution rate and duration of the quasi radial flow stage. Fourth, the production profile prediction of a real shale gas well matches well with the tracer monitoring results, verifying the practicality and reliability of the model. In conclusion, the production profile prediction model of fractured shale gas horizontal well considering SRV heterogeneity between different sections can effectively solve the problem of difficult production profile prediction in shale gas reservoir engineering, and plays an important role in guiding fracturing technology optimization and benefit development of shale gas. © 2023 Natural Gas Industry Journal Agency. All rights reserved.
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页码：80 / 89
页数：9
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