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1.发明公开公开(公告)号：US20240328301A1
公开(公告)日：2024-10-03
申请号：US18620276
申请日：2024-03-28
发明人： Xiaohua TAN , Taixiong QING , Xiaoping LI , Lei DING , Xian PENG , Longxin LI
IPC分类号： E21B47/005 , E21B47/07 , E21B47/08 , E21B47/117
CPC分类号： E21B47/005 , E21B47/07 , E21B47/08 , E21B47/117 , E21B2200/20
摘要： The present disclosure provides a method for predicting a water invasion frontier for a complex well in a bottom-water gas reservoir. The technical solution is as follows: with consideration of forms of different well types and a gravitational pressure drop in production, a coupled permeability of a corresponding well type acting on a gas-water interface under the action of a baffle plate is expressed by using an equivalent percolation resistance method; a productivity of each infinitesimal section of the corresponding well type is calculated; a position of the gas-water interface is calculated with an equivalent permeability and a pseudo-productivity as characteristic parameters; water breakthrough is determined when there is a point over a water avoidance height, and a change in water invasion frontier form may be expressed with water quality point position data at this time.
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2.发明公开公开(公告)号：US20230258082A1
公开(公告)日：2023-08-17
申请号：US17863698
申请日：2022-07-13
发明人： Xiaohua TAN , Xiaobing HAN , Xiaoping LI , Mingqing KUI , Zihan ZHAO , Xixiang LIU , Tao LI , Youjie XU , Yumin LI , Yongqiang JIN
CPC分类号： E21B49/0875 , E21B47/06 , E21B2200/20
摘要： An intelligent identification method of aquifer distribution in complex edge-water oil and gas reservoirs is provided. The problem, that targeted water control countermeasures cannot be proposed due to unclear identification of edge-water distribution in complex edge-water reservoirs, is resolved. Based on geological data and production data of a single well, establish a numerical simulation model of a water influx unit for simulating inflow dynamic of complex edge-water influx; by a genetic algorithm, correct characteristic parameters of an aquifer unit, including volume and water influx of the aquifer unit; automatically fit dynamic production data calculated by the model with actual dynamic production data, to obtain optimal characteristic parameters of the aquifer unit; and assign the characteristic parameters to the aquifer unit for inversion to determine aquifer distribution. The method has simple steps and accuracy by comparing the result of aquifer distribution inversion and that of numerical simulator.
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公开(公告)号：US20230017069A1
公开(公告)日：2023-01-19
申请号：US17812106
申请日：2022-07-12
发明人： Xiaohua TAN , Yan ZHANG , Xiaoping LI , Miaofeng CUI , Xian PENG , Qian LI , Longxin LI , Xixiang LIU , Zihan ZHAO , Zhenglin MAO
摘要： The present disclosure relates to a prediction method for constant production decline of a water-producing gas well in a highly heterogeneous reservoir. The prediction method mainly includes: collecting related data of a target water-producing gas well, fitting to obtain a water-drive constant and a water invasion constant, fitting dynamic reserves by adopting a Blasingame plotting method, conducting fitting by adopting a dual-medium model to obtain an elastic storativity ratio and an interporosity flow coefficient, calculating a reservoir heterogeneity coefficient, obtaining a flowing bottomhole pressure at the later stage of stable production, calculating formation pressure of a new day through quantitative production of the target water-producing gas well with 1 day as an iteration stride, performing iteration until the formation pressure is less than or equal to the formation pressure at the end of stable production, and drawing a prediction curve about constant production decline of the target water-producing gas well.
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