高含硫裂缝性气藏储层伤害数学模型

doi:10.7623/syxb201003020

石油学报 ›› 2010, Vol. 31 ›› Issue (3): 463-466.DOI: 10.7623/syxb201003020

高含硫裂缝性气藏储层伤害数学模型

付德奎 1 郭肖 1 杜志敏 1 张勇 1 付玉 1 邓生辉 2 刘林清 3

1 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； 2 中国石油吐哈油田工程技术研究院新疆鄯善 838202； 3 中国石油西南油气田公司勘探开发研究院四川成都 610051

收稿日期:2009-06-18 修回日期:2009-09-09 出版日期:2010-05-25 发布日期:2010-07-28
通讯作者: 付德奎
作者简介:付德奎，男，1978年8月生，2007年获西南石油大学硕士学位,现为该校油气田开发工程专业在读博士研究生，主要从事油气藏工程和油气藏数值模拟研究工作。
基金资助:
国家高技术研究发展计划（863）项目（2007AA06Z209）和国家自然科学基金项目（No.50774062）联合资助。

Mathematical model for formation damage of fractured gas reservoir with high-content H₂S

FU Dekui 1 GUO Xiao 1 DU Zhimin 1 ZHANG Yong 1 FU Yu 1 DENG Shenghui 2 LIU Linqing 3

Received:2009-06-18 Revised:2009-09-09 Online:2010-05-25 Published:2010-07-28

摘要/Abstract

摘要：

在高含硫裂缝性气藏气体开采过程中，地层压力不断降低，导致硫微粒在气相中的溶解度逐渐减小，在达到临界饱和态后从气相中析出，并在储层孔隙及喉道中运移、沉积，导致地层孔隙度和渗透率降低。地层压力的降低导致裂缝逐渐闭合，也会导致地层孔隙度和渗透率的降低，从而影响气井的产能和经济效益，严重时可导致气井停产。针对高含硫裂缝性气藏复杂渗流特征，基于空气动力学气固理论描述硫微粒在多孔介质中的运移和沉积，建立了一个全新的、能够综合描述多孔介质中硫微粒的析出、运移、沉积、堵塞以及应力敏感的高含硫裂缝性气藏储层伤害数学模型，并以L7井为例进行了实例分析。研究结果表明：在定产量生产条件下，硫沉积对气井生产动态的影响主要表现为气井的稳产时间缩短及气井产量在递减期内的递减速度加快。

关键词: 高含硫裂缝性气藏, 硫沉积, 储层伤害, 应力敏感性, 数学模型

Abstract:

During the development of fractured gas reservoir with high-content H₂S, continual drop of formation pressure could lead to the declined solubility of sulfur particles in gas phase. The sulfur particles would be precipitated from gas phase after running up to saturation state and deposited at pore space and throat, which sequentially results in reduction of formation porosity and permeability. The decrease of formation pressure would result in fractures closed continually, which also results in descending of porosity and permeability of formation. The production and economic effects of gas well may be affected when sulfur deposition and fracture close become severe. According to the characteristics of complex flow through porous media in the fractured gas reservoir with high-content H₂S, based on the aerodynamics theory used to build a mathematical model for describing the transportation and precipitation of sulfur particles in the fractured gas reservoir with high-content H₂S, a new model was proposed to comprehensively describe formation damage in the fractured gas reservoir with high-content H₂S and to account for deposition, precipitation, migration and blockage of sulfur particles and stress sensitivity. The Well L7 was taken as a case of application. The results showed that the effects of sulfur deposition on production performance included the decrease of stable production period resulted from sulfur deposition and faster descending of production rate in the descending stage of production rate of gas well.

Key words: fractured gas reservoir with high-content H₂S, sulfur deposition, formation damage, stress sensitivity, mathematical model

付德奎郭肖杜志敏张勇付玉邓生辉刘林清. 高含硫裂缝性气藏储层伤害数学模型[J]. 石油学报, 2010, 31(3): 463-466.

FU Dekui GUO Xiao DU Zhimin ZHANG Yong FU Yu DENG Shenghui LIU Linqing. Mathematical model for formation damage of fractured gas reservoir with high-content H₂S[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(3): 463-466.

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高含硫裂缝性气藏储层伤害数学模型

Mathematical model for formation damage of fractured gas reservoir with high-content H₂S

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高含硫裂缝性气藏储层伤害数学模型

Mathematical model for formation damage of fractured gas reservoir with high-content H2S

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Mathematical model for formation damage of fractured gas reservoir with high-content H₂S