页岩凝析气井产能预测的三线性流模型

发布时间：2018-02-02 14:49

本文关键词： 页岩凝析气油气两相产能三线性流模型　出处：《天然气地球科学》2017年11期 　论文类型：期刊论文

【摘要】：页岩凝析气井的产能预测须同时考虑复杂缝网改造体和油气两相流特征。基于三线性流模型表征压裂改造体,考虑流体相变和相渗,并用Langmuir等温吸附模型表征页岩基质中气体的吸附解吸,建立了页岩凝析气井产能预测数学模型。通过模型的线性化处理,结合流动物质平衡方法,获得了模型的半解析解。运用数值模拟结果和矿场生产数据验证了模型的准确性和实用性。结果表明:(1)通过饱和度和压力相关参数的显隐式处理,并结合流动物质平衡方法可以有效地将数学模型线性化;(2)所建立的油气两相产量预测半解析方法误差小,可运用于矿场实际;(3)相同条件下,页岩凝析气的流动能力比单相页岩气更弱,合理缝网参数对提高油气两相产能至关重要。
[Abstract]:The productivity prediction of shale condensate gas wells must take into account the characteristics of complex fracture network reformation and oil and gas two-phase flow simultaneously. Based on the trilinear flow model, the fracturing reconstruction body should be characterized, and the fluid phase transition and permeability should be considered. The Langmuir isothermal adsorption model was used to characterize the adsorption and desorption of gas in shale matrix, and a mathematical model for predicting the productivity of shale condensate gas wells was established. Combined with flow material balance method. The semi-analytical solution of the model is obtained. The accuracy and practicability of the model are verified by numerical simulation results and field production data. The results show that the model is treated explicitly and implicitly by saturation and pressure-related parameters. The mathematical model can be linearized effectively by using the method of fluid mass balance. 2) the semi-analytical method for predicting oil and gas two-phase production has small error and can be applied to the field practice. 3) under the same conditions, the flow capacity of shale condensate gas is weaker than that of single-phase shale gas.
【作者单位】：中国石油大学石油工程学院;中海油研究总院;
【基金】：国家科技重大专项“页岩气渗流规律与气藏工程方法”(编号:2017ZX05037001) 中海石油(中国)有限公司综合科研项目“海外页岩油气产能评价技术与方法研究”(编号:YXKY-2016-ZY-03)联合资助
【分类号】：TE372
【正文快照】： [吴永辉,程林松,黄世军,等.页岩凝析气井产能预测的三线性流模型[J].天然气地球科学,2017,28(11):1745-1754.]0引言随着压裂水平井技术逐渐走向成熟,北美Ea-gle Ford盆地致密油气、页岩油气资源也得以实现工业化开采[1]。根据邹才能等[2]、姜在兴等[3]、张金川等[4]的研究表明

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