Southwest Petroleum University

Zhenglin Mao

Xiaohua Tan

Xiaoping Li

Mingqing Kui

Hao Yang

Qian Li

Tao Li

Fei Zhang

Yan Zhang

Xian Peng

Xiaobing Han

Zihan Zhao

Longxin Li

Xixiang Liu

Guojun Yang

Miaofeng Cui

Daijin Zhuang

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.

Prediction method for constant production decline of water-producing gas well in highly heterogeneous reservoir

An intelligent water invasion tracking and early warning method for water-gas reservoirs includes based on the gas-water two-phase seepage equation, obtaining the water invasion constant and the water flooding index by combining the gas-water two-phase permeability expression with the water invasion material balance method, fitting by automatic fitting method, finding a best fitting between an optimal theoretical value and an actual value, dividing a block into different water invasion areas based on the water flooding index, revising a water invasion classification boundary based on production dynamic monitoring and well logging interpretation results, and tracking and early warning water invasion by drawing a water flooding index distribution map of water-gas reservoirs according to the water flooding index. The present invention solves the problem of no method for tracking and predicting the water invasion direction and the water invasion intensity in real time.

Intelligent water invasion tracking and early warning method for water-gas reservoirs

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Sichuan, China

Zhenglin Mao