针对应用当前方法预测储气库井底流入动态误差大的问题,开展储气库渗流模拟实验,建立了考虑气藏改建储气库后渗透率变化的井底流入动态方程,并通过实例进行了验证。模拟实验结果表明,水侵储集层改建储气库后,气相渗透率与气藏开发阶段不同,受储气库运行中气水渗流关系的影响,过渡带渗透率逐步恶化,纯气区渗透率逐步改善、甚至超过气藏开发初期储集层水侵前的水平。依据实验结果,引入描述气藏改建储气库后渗透率变化的参数,改进了传统井底流入动态方程,利用气藏开发资料预测改建储气库后井底流入动态。实例分析结果表明,改进后的井底流入动态方程考虑了渗透率的影响,预测结果与实测结果基本一致,而传统方法预测结果与实测结果有较大差别。图2表1参18
唐立根
,
王皆明
,
丁国生
,
孙莎莎
,
赵凯
,
孙军昌
,
郭凯
,
白凤娟
. 基于开发资料预测气藏改建储气库后井底流入动态[J]. 石油勘探与开发, 2016
, 43(1)
: 127
-130
.
DOI: 10.11698/PED.2016.01.16
In view of the gap between the inflow-performance forecasted by the traditional equation and the actual inflow-performance, experiments of gas-gas alternating seepage flow and gas-water alternating seepage flow were carried out, and a modified equation of inflow-performance relationship considering gas permeability change due to water invasion was established. This equation was verified by example analysis. The experimental results show that: gas permeability of net pay, when water-invaded reservoirs are converted into underground gas storage, is different from that during actual gas field development, in that the value of permeability decreases gradually in gas-water zone while the value increases gradually and even higher than that of original gas field in gas zone as a result of gas water alternative flooding in gas storage. Then one parameter describing the extent of permeability change when gas reservoirs are converted into gas storage was defined based on the result of the experiments, and eventually the traditional equation of inflow-performance relationship was modified to forecast inflow-performance in gas storage based on data from field development. Example analysis result shows that: the modified equation considers the effect of changing permeability, its results agree with the actual inflow-performance, while the result of traditional equation differs greatly from the actual inflow-performance.
[1] 丁国生, 王皆明. 枯竭气藏改建储气库需要关注的几个关键问题[J]. 天然气工业, 2010, 31(5): 87-89.
DING Guosheng, WANG Jieming. Key points in the reconstruction of an underground gas storage based on a depleted gas reservoir[J]. Natural Gas Industry, 2010, 31(5): 87-89.
[2] 王皆明, 王丽娟, 耿晶. 含水层储气库建库注气驱动机理数值模拟研究[J]. 天然气地球科学, 2005, 16(5): 673-676.
WANG Jieming, WANG Lijuan, GENG Jing. The numerical simulation study on the gas-drive menchanism of aquifer gas storage[J]. Natural Gas Geoscience, 2005, 16(5): 673-676.
[3] 王皆明, 张昱文, 丁国生, 等. 任11井潜山油藏改建地下储气库关键技术研究[J]. 天然气地球科学, 2004, 15(4): 406-411.
WANG Jieming, ZHANG Yuwen, DING Guosheng, et al. Methods of rebuilding well Ren 11 buried hill oil reservoir as underground gas storage[J]. Natural Gas Geoscience, 2004, 15(4): 406-411.
[4] 王皆明, 姜凤光. 砂岩油藏改建地下储气库注气能力预测方法[J]. 天然气地球科学, 2008, 19(5): 727-729.
WANG Jieming, JIANG Fengguang. A method for predicting gas injection ability of UGS rebuilt from a sandstone reservoir[J]. Natural Gas Geoscience, 2008, 19(5): 727-729.
[5] 唐立根, 王皆明, 白凤娟, 等. 基于修正后的物质平衡方程预测储气库库存量[J]. 石油勘探与开发, 2014, 41(4): 480-484.
TANG Ligen, WANG Jieming, BAI Fengjuan, et al. Inventory forecast in underground gas storage based on modified material balance equation[J]. Petroleum Exploration and Development, 2014, 41(4): 480-484.
[6] 谭羽非, 林涛. 凝析气藏地下储气库单井注采能力分析[J]. 油气储运, 2008, 27(3): 27-29.
TAN Yufei, LIN Tao. Analysis on the single-well capacity of injection and production in underground gas storage of condensate gas reservoir[J]. Oil & Gas Storage and Transportation, 2008, 27(3): 27-29.
[7] 赵平起. 大张坨凝析气藏地下储气库配套技术研究[D]. 成都: 成都理工学院, 2001.
ZHAO Pingqi. The study on supplementary technology for Da Zhangtuo gas-condensate reservoir underground gas storage[D]. Chengdu: Chengdu University of Technology, 2001.
[8] 于刚, 杜京蔚, 邹晓燕, 等. 华北储气库注采气井管柱优选研究[J]. 天然气地球科学, 2013, 24(5): 1086-1090.
YU Gang, DU Jingwei, ZOU Xiaoyan, et al. Tubing string optimization study of Huabei gas storage[J]. Natural Gas Geoscience, 2013, 24(5): 1086-1090.
[9] 汪雄雄, 樊莲莲, 刘双全, 等. 榆林南地下储气库注采井完井管柱的优化设计[J]. 天然气工业, 2014, 34(1): 92-96.
WANG Xiongxiong, FAN Lianlian, LIU Shuangquan, et al. An optimal design of completion string of an injection and production well in the Yulinnan underground gas storage[J]. Natural Gas Industry, 2014, 34(1): 92-96.
[10] 林刚, 张剑锋, 李朝曾, 等. 气藏储气库运行过程中产能监测方法研究[J]. 油气井测试, 2014, 23(1): 14-19.
LIN Gang, ZHANG Jianfeng, LI Chaozeng, et al. Research on production monitoring to gas storage of the gas reservoir during its moving process[J]. Well Testing, 2014, 23(1): 14-19.
[11] 王颍超. S4潜山凝析气藏改建储气库可行性研究[D]. 成都: 西南石油大学, 2014.
WANG Yingchao. Feasibility of building underground gas storage in S4 buried hill gas condensate reservoir[D]. Chengdu: Southwest Petroleum University, 2014.
[12] 汪会盟. 储气库注采能力研究[D]. 青岛: 中国石油大学(华东), 2011.
WANG Huimeng. The research on injection-production capability of the gas storage[D]. Qingdao: China University of Petroleum, 2011.
[13] 尹双江. 万顺场石炭系气藏改建地下储气库可行性研究[D]. 成都: 西南石油大学, 2012.
YIN Shuangjiang. The feasibility of building underground gas storage in Wanshun gas field[D]. Chengdu: Southwest Petroleum University, 2012.
[14] 刘学. 刘庄地下储气库动态分析研究[D]. 成都: 西南石油大学, 2014.
LIU Xue. Dynamic analysis of Liuzhuang underground gas storage[D]. Chengdu: Southwest Petroleum University, 2014.
[15] 曹锡秋. 新疆某地衰竭气藏地下储气库地应力特征研究[D]. 北京: 中国地质大学(北京), 2013.
CAO Xiqiu. Research on reservoir geomechanic features of a gas storage in Xinjiang after natural depletion[D]. Beijing: China University of Geosciences(Beijing), 2013.
[16] 中华人民共和国国家发展和改革委员会. SY/T 5345-2007 岩石中两相流体相对渗透率测定方法[S]. 北京: 石油工业出版社, 2008.
National Development and Reform Comission. SY/T 5345-2007 Measurement method of two-phase relative permeabilities in rocks[S]. Beijing: Petroleum Industry Press, 2008.
[17] AL-HUSSAINY R. The flow of real gases through the porous media[J]. JPT, 1996, 48(6): 24-36.
[18] ZHU D T. Hydrodynamic characteristics of a single-row pile breakwater[J]. Coastal Engineering Elsevier, 2011, 58(4): 446-451.
