Inversion and interpretation of production profile and fracture parameters of fractured horizontal wells in low-permeability gas reservoirs

被引：0
|
作者：
Luo H. [1 ]
Li H. [1 ]
Li Y. [1 ]
Wang F. [2 ]
Xiang Y. [1 ]
Jiang B. [1 ]
Yu H. [1 ]
机构：
[1] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu
[2] Experimental Detection Research Institute, PetroChina Xinjiang Oilfield Company, Karamay
来源：
Shiyou Xuebao/Acta Petrolei Sinica | 2021年 / 42卷 / 07期
关键词：
Distribution temperature sensing; Fracture parameter diagnosis; Fractured horizontal well; Inversion model; Production profile interpretation; Simulated annealing algorithm;
D O I：
10.7623/syxb202107008
中图分类号：
学科分类号：
摘要：
To solve the problems such as unclear gas production profile, unknown contributions of fractures, and difficulty in determining fracture parameters during the exploration of horizontal wells in low-permeability gas reservoirs, this paper establishes an inversion model for distributed temperature sensing (DTS) data based on the Simulated Annealing (SA) algorithm when using the coupled prediction model of temperature profile of fractured horizontal wells as the forward model, optimizes the inversion process, and finally obtains a set of quantitative interpretation methods for the production profile and fracture parameters of fractured horizontal wells based on DTS. Through simulation analysis of the influence of fracture half-length on temperature profile, it is found that the temperature profile of fractured horizontal wells is irregular-sawtooth shaped, and as the fracture half-length increases, the temperature profile of the wellbore increases as a whole, and the corresponding temperature drop of fracture is positively correlated with flow rate. The DTS data of a well have been inverted. Based on the accurate and effective diagnosis of artificial fractures, the value of error function after inversion reaches 5×10-6, and the absolute value of temperature error at each fracture positions is less than 0.02 K. The error between the single well production obtained by inversion and the measured production rate at the wellhead is less than 5 m3/d, and the interpreted fracture flowrates of all fracturesare also in good agreement with the measured PLT values that verifies the reliability of the inversion interpretation model. © 2021, Editorial Office of ACTA PETROLEI SINICA. All right reserved.
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页码：936 / 947
页数：11
相关论文
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