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公开(公告)号：US11371344B2
公开(公告)日：2022-06-28
申请号：US16620657
申请日：2018-09-21
Applicant: University of Science and Technology Beijing
Inventor： Weiyao Zhu , Zhiyong Song , Ming Yue , Yunfeng Liu , Zhen Chen , Dongxu Ma , Wenchao Liu , Qian Qi
Abstract: A method for identifying a medium structure coupling and a fracture network morphology of a shale gas reservoir includes the following steps. Firstly, performing a fracturing test on shale cores by using a modified Brazilian disc test and categorizing the fracture network morphology. Secondly, performing a shale matrix-fracture structure and stress sensitivity test on the shale cores having different fracture network morphology. After that, determining a stress sensitivity constant of different fracture network morphology according to indoor core data and finally preparing an identification chart of the fracture network morphology based on an indoor core stress sensitivity test combined with a production practice. The identification chart can be applied to an actual fracturing well, and the fracture network morphology is directly identified by a real-time effective stress and a normalized flow.
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公开(公告)号：US11136871B2
公开(公告)日：2021-10-05
申请号：US17149015
申请日：2021-01-14
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： Weiyao Zhu , Zhiyong Song , Jianfa Wu , Shou Ma , Debin Kong , Ming Yue , Zhen Chen , Yubao Gao
Abstract: A method for developing shale gas by tapered gradient pressure drop with multi-stage fractured horizontal well is provided and the method comprises: acquiring fracturing crack form parameters of the multi-stage fractured horizontal well and reservoir characteristic parameters of nearby formation; dividing the formation near the shale gas multi-stage fractured horizontal well into strongly transformed area, weakly transformed area and matrix area; establishing pressure difference-flow models of gas-phase and water phase of the three areas respectively, and coupling the models of the three areas to establish production equation of the multi-stage fractured horizontal well; according to the production equation of the multi-stage fractured horizontal well, performing numerical simulation with different combinations of production pressure differences in the three stages of the multi-stage fractured horizontal well; and selecting a combination of production pressure differences with the greatest economic benefit as combination of production pressure differences.
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公开(公告)号：US10822938B2
公开(公告)日：2020-11-03
申请号：US16833806
申请日：2020-03-30
Inventor： Weiyao Zhu , Kun Huang , Zhen Chen , Ming Yue , Zhiyong Song , Hua Li , Baichuan Wang , Debin Kong
Abstract: A method of optimizing well spacing for shale gas development is provided. It belongs to the technical field of hydrocarbon reservoir exploration and development. The method comprises: firstly verifying block area based on the explored geological structure; analyzing the connection situation of a shale reservoir, identifying the minimum developing area units; calculating the recoverable reserves of the units, confirming the candidate units; drilling representative shale cores and analyzing related physical properties; calculating seepage field and pressure field using unified multi-field, multi-flow-regime, and multi-scale mathematical models; calculating the effective recoverable area of each well; and arranging wells based on the rule that the interference among wells is not larger than 10%. Considering the fluid-solid coupling effects, the method can define appropriately well spacing for shale gas exploration and enhance effectively the output of shale gas.
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