[1]聂仁仕,贾冉,蔡明金,等.双孔双渗油藏斜井压力动态特征分析[J].深圳大学学报理工版,2022,39(6):660-667.[doi:10.3724/SP.J.1249.2022.06660]
 NIE Renshi,JIA Ran,CAI Mingjin,et al.Analysis on the pressure dynamic characteristics of slanted well in dual-porosity and dual-permeability reservoir[J].Journal of Shenzhen University Science and Engineering,2022,39(6):660-667.[doi:10.3724/SP.J.1249.2022.06660]
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双孔双渗油藏斜井压力动态特征分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第39卷
期数:
2022年第6期
页码:
660-667
栏目:
环境与能源
出版日期:
2022-11-15

文章信息/Info

Title:
Analysis on the pressure dynamic characteristics of slanted well in dual-porosity and dual-permeability reservoir
文章编号:
202206007
作者:
聂仁仕贾冉蔡明金李洪卢聪杨岚
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)中石油天然气股份有限公司塔里木油田分公司勘探开发研究院,新疆库尔勒 841000; 3)中石油天然气股份有限公司塔里木油田分公司轮南油气开发部,新疆库尔勒 841000
Author(s):
NIE Renshi JIA Ran CAI Mingjin LI Hong LU Cong YANG Lan
1) State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan Province, P.R.China 2) Exploration and Development Research Institute, Tarim Oilfield Company, PetroChina, Korla 841000, Xinjiang Uygur Autonomous Region, P.R.China 3) Lunnan Oil & Gas Development Department, Tarim Oilfield Company, PetroChina, Korla 841000, Xinjiang Uygur Autonomous Region, P.R.China
关键词:
油田开发裂缝性油藏斜井双孔双渗渗流模型压力动态
Keywords:
oilfield development fractured reservoirs slanted well dual-porosity and dual-permeability flow model pressure dynamics
分类号:
TE312
DOI:
10.3724/SP.J.1249.2022.06660
文献标志码:
A
摘要:
为研究裂缝性油藏斜井的双渗规律及其压力动态的变化特征,建立一个双孔双渗斜井渗流模型.利用Laplace变换、分离变量和点源函数叠加等方法对模型进行了求解,获得Laplace空间下模型的解析解.编程绘制一系列受裂缝系统与总系统渗透率比值等模型参数控制的双孔双渗油藏斜井压力动态特征曲线.利用绘制的压力动态特征曲线,识别斜井早期径向流、中期线性流和基质向裂缝窜流等7个渗流流动阶段.分析斜井与直井、水平井渗流特征曲线的差异,斜井比直井多了早期径向流和中期线性流阶段,且这两个流动阶段相比于水平井持续时间短.此外,分析了井斜角和斜井井长等参数对特征曲线的影响;井斜角、井长越大,曲线位置越低,早期径向流和中期线性流阶段越明显;裂缝渗透率比越大,窜流阶段越显著,窜流凹子越深.建立的模型及一系列压力动态特征曲线可以用于研究裂缝性油藏斜井的渗流特征.
Abstract:
In order to understand the dual-permeability flow law of slanted well in a fractured reservoir and study the change characteristics of pressure dynamics, a flow model of slanted well in a dual-porosity and dual-permeability reservoir was established. The model was solved using the methods of Laplace transformation, separation of variables, and superposition of sink source functions, etc. The dynamic analytical expression of bottomhole pressure in Laplace space was obtained. A series of pressure dynamic characteristic curves of slanted well in dual-porosity and dual-permeability reservoirs, which were controlled by model parameters such as permeability ratio of fracture system to total system, were drawn by programming. Based on the pressure dynamic characteristic curve, seven flow stages, such as early radial flow stage, middle linear flow stage and inter-porosity flow stage from matrix to fracture, were identified. In particular, the difference of flow characteristic curves between slanted well, vertical well and horizontal well was analyzed. It was found that slanted well has more early radial flow stage and middle linear flow stage than vertical well, and these two flow stages have shorter duration than horizontal well. In addition, the influence of inclination angle of well, well length and other parameters on the characteristic curve was analyzed. The larger the inclination angle and well length, the lower the curve position, the more obvious the early radial flow stage and the middle linear flow stage. The larger the permeability ratio of fracture system to total system is, the more significant the inter-porosity stage is and the deeper the inter-porosity concave is.The established model and a series of pressure dynamic characteristic curve can be used to study the seepage characteristics of slanted wells in fractured reservoirs.

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更新日期/Last Update: 2022-11-30