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1.发明申请公开(公告)号：US20210003731A1
公开(公告)日：2021-01-07
申请号：US16790801
申请日：2020-02-14
Applicant: Chengdu University of Technology
Inventor： Haiyan ZHU , Yapu ZHAO , Jianchun GUO , Xuanhe TANG
Abstract: A method for determining a favorable time window of an infill well of an unconventional oil and gas reservoir, which comprises the following steps: S1, establishing a three-dimensional geological model with physical properties and geomechanical parameters; S2, establishing a natural fracture network model in combination with indoor core-logging-seismic monitoring; S3, calculating complex fractures in hydraulic fracturing of parent wells; S4, establishing an unconventional oil and gas reservoir model and calculating a current pore pressure field; S5, establishing a dynamic geomechanical model and calculating a dynamic geostress field; S6, calculating complex fractures in horizontal fractures of the infill well in different production times of the parent wells based on pre-stage complex fractures and the current geostress field; S7, analyzing a microseismic event barrier region and its dynamic changes in infill well fracturing; and S8, analyzing the productivity in different infill times, and determining an infill time window.
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2.发明公开公开(公告)号：US20240310861A1
公开(公告)日：2024-09-19
申请号：US18418172
申请日：2024-01-19
Applicant: Chengdu University of Technology
Inventor： Jianguo ZHAO , Penghui LIANG , Qingyou LIU , Guorong WANG , Haotian ZHENG , Hanxiu PENG , Min WAN , Gang HU , Xu LUO , Yingju PEI , Xingming WANG , Xianwei DAI , Xuanhe TANG , Lei TAO
CPC classification number: G05D7/0623 , G05B13/041 , G05D7/0635
Abstract: A method, an apparatus and a system for automatically adjusting an opening degree of a fluid control valve, relating to the technical field of oil and gas exploration and development. The method includes: establishing a fluid control valve having an orifice structure in oil and gas production; using a numerical simulation method to obtain the influence law of minimum opening degree adjustment step on oil and gas production; obtaining relevant production test data of the oil and gas well, and calculating the total oil and gas production and the oil and gas production of each production layer based on the production test data of the oil and gas well; dividing the production layer segments into high, middle and low-production layers according to the production ratio of each production layer segment; respectively calculating the average productions of the high, middle and low-production layers.
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公开(公告)号：US20210003727A1
公开(公告)日：2021-01-07
申请号：US16580936
申请日：2019-09-24
Applicant: Chengdu University of Technology
Inventor： Haiyan ZHU , Jingen DENG , Xuanhe TANG
Abstract: The present invention discloses an optimization design method for volumetric fracturing construction parameters of an infilled well of an unconventional oil and gas reservoir. The method comprises the following steps: S1, establishing a three-dimensional geological model with physical and geomechanical parameters; S2, establishing a natural fracture network model through integration of rock core-logging-seismic data; S3, generating old well hydraulic fracturing complex fractures based on the natural crack model; S4. establishing a three-dimensional shale gas reservoir seepage model; S5, establishing a three-dimensional geomechanical model; S6, analyzing and calculating a dynamic geostress field; S7, establishing a numerical model for horizontal fracturing complex fractures in the infilled well based on the calculation results of old well complex fractures and dynamic geostress; and S8, performing optimization design on volumetric fracturing construction parameters of the infilled well. The method of the present invention has the following beneficial effects: the effects of long-term exploitation of shale reservoirs in which natural fractures are developed on volumetric fracturing of the infilled well can be reflected accurately, the fracturing construction parameters are subjected to optimization design, the fracturing effect is improved effectively, and the single-well capacity is increased.
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