考虑耦合效应的页岩油井筒温压分布预测分析

打开文本图片集

中图分类号：TE355文献标识码：ADOI：10.12473/CPM.202405045

Dong Kangxing，Guo Shukui，Jin Zhongshi，etal.Predictionand analysis of temperature and pressure distribution ir shale oil welbore considering coupling effect [J]. China Petroleum Machinery，2025，53（5）：110-116.

Prediction and Analysis of Temperature and Pressure Distribution in Shale Oil Wellbore Considering Coupling Effect

Dong Kangxing1Guo Shukui'Jin Zhongshi²Zhao Xinrui'Chen Yongfeng1Guo Zhuang' （1.SchoolofMechanical Scienceand Enginering，Northeast Petroleum University；.No.8OperationAreaofNo.2OilPro duction Plant，CNPC Daqing Oilfield Company Limited）

Abstract：The temperature and pressure in wellore are important parameters for production prediction，performance analysis and production design of shale oil wels.Based on field monitoring data，a temperature and pressure prediction method for oil and gas mixed welbore under multi-field coupling was proposed using wellbore pressure model，wellbore heat transfer theory and drift model.Then，the constructed coupling model was solved using the Newton iteration method，and verified through a comparative analysis of coupling by combining with literature dataand measured data from shale oil wels in Daqing Oilfield.Finally，using this model，the sensitivities of gas production，liquid production and disslved gas-oil ratio to temperature and pressre were analyzed.The results show thatan increase in liquid/gas production leads toan increase in temperature，whilean increase in dissolved gas-oil ratio has litle impact on temperature.The increase in liquid production leads toan increase in pressure，the increase in gas production leads toa decrease in pressre before increasing，and the increase in dissolved gas-oil ratio leads to a decrease in overallpressure trend.The pressre and temperature predicted using the proposed method have errors of 1.39% and 1.44% respectively compared to the measured data， which can meet the requirements of engineering calculations. The conclusions provide guidance for the development of shale oil wells.

Keywords：shale oil well；drift model；temperature-pressure coupling model；wellbore temperature and pressure prediction; gas production; liquid production; dissolved gas-oil ratio

0引言

页岩油开采时，井筒内页岩油和页岩气的物性参数受温度和压力的相互影响，加上页岩油井具有产气量大，流型复杂及高温高压的特点，使得测量页岩油井筒的温度压力分布变得困难。（剩余9606字）