高含硫复合气藏试井解释模型研究

油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (6): 24-27.

高含硫复合气藏试井解释模型研究

王海涛,寇祖豪,张烈辉,郭晶晶

西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500

收稿日期:2017-10-10 出版日期:2018-12-26 发布日期:2018-12-13
作者简介:王海涛（1980—）,男,博士,副教授,油气藏渗流力学、油气井试井及油气藏工程理论与应用技术研究。
基金资助:
国家自然科学基金“基于高精度边界元法的多尺度多机制复杂缝网页岩气藏压裂水平井动态模拟”(51774243);国家自然科学基金“致密气藏储层干化、提高气体渗流能力的基础研究”(51534006);国家科技重大专项“长宁—威远页岩气开发示范工程”(2016ZX05062);国家科技重大专项“昭通页岩气勘探开发示范工程”(2017ZX05063)

Research on well test interpretation model for composite gas reservoir with high sulfur

Wang Haitao,Kou Zuhao,Zhang Liehui,Guo Jingjing

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2017-10-10 Online:2018-12-26 Published:2018-12-13

摘要/Abstract

摘要：

高含硫气藏在开采过程中,当近井地带压力降低到临界值后,溶解在气体中的硫就会逐渐沉积并堵塞孔道,严重影响气井的产能。利用分形理论,基于高含硫气藏的硫沉积区和未沉积区建立了复合气藏模型。该模型考虑了井筒相分离、井筒储集效应、表皮系数以及硫沉积区渗透率变化等因素的影响,利用Stehfest数值反演得到真实空间下模型井底拟压力解,结合Visual Basic 6.0绘制井底拟压力及导数的双对数曲线,并就表皮因子、渗透率变化指数、流度比等因素进行了敏感度分析,所得结论具有重要的实际意义。

关键词: 高含硫气藏, 复合模型, 渗透率解析式, 相分离, 试井曲线绘制

Abstract:

During the development process of gas reservoirs with high sulfur, when the pressure near the wellbore reduced to a critical value, the sulfur particles precipitated gradually and cloged the pores and fractures, decreasing the productivity of gas wells. Based on the fractal theory, this model for composite gas reservoirs with high sulfur, consisted of inner region and outer region, wass established. Taking wellbore fluid phase separation, wellbore storage factor, skin factor and varying permeability into consideration and by the Stehfest numerical inversion method, this model solved the bottom hole pseudo-pressure solutions in real space. Then with the assistance of Visual Basic 6.0 programming, the log-log type curves for pseudo-pressure and pseudo-pressure derivative were obtained. Finally, the influence of some factors such as skin factor, varying permeability index and mobility ratio on type curves were analyzed. The results had some essential practical significance.

Key words: gas reservoirs with high sulfur, composite model, permeability analytical expression, phase separation, well test type curves drawing

中图分类号:

TE373

王海涛,寇祖豪,张烈辉,郭晶晶. 高含硫复合气藏试井解释模型研究[J]. 油气藏评价与开发, 2018, 8(6): 24-27.

Wang Haitao,Kou Zuhao,Zhang Liehui,Guo Jingjing. Research on well test interpretation model for composite gas reservoir with high sulfur[J]. Reservoir Evaluation and Development, 2018, 8(6): 24-27.

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参考文献 9

[1]	胡书勇, 张烈辉 . 高含硫气藏硫沉积的研究进展[J]. 钻采工艺, 2009,32(1):71-74.
[2]	贺胜宁, 冯异勇, 贾永禄 . 双重介质复合油气藏试井分析模型及压力动态特征[J]. 天然气工业, 1995,15(5):53-56.
[3]	李成勇, 张烈辉, 刘启国 , 等. 高含硫气藏试井解释方法研究[J]. 钻采工艺, 2006,29(2):51-53.
[4]	李晓平, 张烈辉, 李允 . 含硫气藏压力动态分析理论研究[J]. 油气井测试, 2008,17(5):1-3. doi: 10.3969/j.issn.1004-4388.2008.05.001
[5]	方晓春, 刘启国, 蒋鑫 , 等. 高含硫气藏两区复合地层试井解释方法研究[J]. 重庆科技学院学报(自然科学版), 2013,15(5):36-39.
[6]	卢婧, 郭肖, 程昌慧 . 高含硫气藏双孔介质试井模型研究[J]. 油气井测试, 2014,31(3):13-16. doi: 10.3969/j.issn.1004-4388.2014.03.004
[7]	杨苗苗, 刘启国, 牟爱婷 , 等. 考虑硫沉积影响的双重介质气藏试井解释模型研究[J]. 油气藏评价与开发, 2016,6(4):39-43.
[8]	孔祥言 . 高等渗流力学(第2版)[M]. 合肥: 中国科学技术大学出版社, 2010.
[9]	胡勇, 钟孚勋, 冯曦 . 考虑井筒相再分布的试井分析方法研究[J]. 天然气工业, 1992,12(1):54-59.