厚层气藏气井拟稳态产能研究

doi:10.3969/j.issn.1673-8926.2017.06.019

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (6): 148–153.doi: 10.3969/j.issn.1673-8926.2017.06.019

厚层气藏气井拟稳态产能研究

黄全华¹, 童凯¹, 陈冲², 陆云¹, 付云辉¹

1. 西南石油大学石油与天然气工程学院, 成都 610500;
2. 中国石化河南油田分公司采油二厂, 河南南阳 473000

收稿日期:2017-08-11 修回日期:2017-10-12 出版日期:2017-11-21 发布日期:2017-11-21
第一作者:黄全华(1968-),男,博士,副教授,主要从事油气藏工程方面的教学与科研工作。地址:(610500)四川省成都市新都区西南石油大学石油与天然气工程学院。Email:swpuhqh@126.com。
基金资助:
国家重大科技专项"厚层非均质性气藏渗流机理及开发技术政策研究"（编号：2016ZX05027-004）资助

Pseudo-steady state deliverability for gas wells in thick gas reservoirs

HUANG Quanhua¹, TONG Kai¹, CHEN Chong², LU Yun¹, FU Yunhui¹

1. College of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China;
2. No.2 Oil Production Plant, Sinopec Henan Oilfield Company, Nanyang 473000, Henan, China

Received:2017-08-11 Revised:2017-10-12 Online:2017-11-21 Published:2017-11-21

摘要/Abstract

摘要： 准确地进行产能评价对于气藏的高效、合理开发十分重要。根据厚层气藏的生产特征，不能采用单一的平面径向流或球面向心流产能方程来评价其产能。因此对以往的产能计算模型进行了改进，将气层分为射开层段和未射开层段，根据渗流力学原理推导了球面向心流的拟稳态产能方程。在此基础上分别推导出了厚层气藏气井2个层段的拟稳态产能方程，并导出了整个生产层段的产能计算公式。实例分析表明：气井打开程度、近井地带表皮效应和气体渗流非达西效应等因素对于产能计算影响较大，基于改进模型的拟稳态产能方程比稳态产能方程计算结果更加符合实际生产情况。该研究成果为厚层气藏气井的产能评价提供了一种可行的理论计算方法。

关键词: Sonic Scanner声波扫描, 裂缝有效性, 频散, 各向异性, 快、慢横波, 震旦系, 四川盆地

Abstract: The deliverability evaluation is one of the main contents of natural gas engineering,which is crucial to the reasonable and efficient development of the gas reservoirs. The plane radial flow deliverability equation and semi-spherical flow deliverability equation are commonly used to evaluate the deliverability of gas wells. For the gas reservoirs with great thickness and high deliverability,the two methods are not so applicable. To derive a new method to evaluate the deliverability of gas well in thick reservoir,the model was improved,in which the layer was made up of perforated interval and unperforated interval. According to the percolation mechanics,pseudo-steady state deliverability equation of gas wells in semi-spherical flow model was deduced. Then the pseudosteady state deliverability equations of the two intervals and the whole gas layer were derived. A calculation example of a producing gas well in thick reservoirs was performed. The results show that the factors of perforating degree, skin effect and effect of non-Darcy flow can't be ignored and the pseudo-steady state deliverability equation based on the improved model is more accordant with the actual production. This study could provide a practicable method for the productivity evaluation for gas wells in thick gas reservoirs.

Key words: Sonic Scanner, fracture effectiveness, dispersion, anisotropy, fast and slow shear wave, Sinian, Sichuan Basin

中图分类号:

TE37

黄全华, 童凯, 陈冲, 陆云, 付云辉. 厚层气藏气井拟稳态产能研究[J]. 岩性油气藏, 2017, 29(6): 148–153.

HUANG Quanhua, TONG Kai, CHEN Chong, LU Yun, FU Yunhui. Pseudo-steady state deliverability for gas wells in thick gas reservoirs[J]. Lithologic Reservoirs, 2017, 29(6): 148–153.

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厚层气藏气井拟稳态产能研究

Pseudo-steady state deliverability for gas wells in thick gas reservoirs

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