煤层气藏储层裂缝建模研究
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摘要
针对煤层气藏储层天然裂缝发育,采用DFN离散裂缝网络模型的裂缝性储层建模方法和思路。以沁端区块煤层气藏为例,首先,建立了煤层气藏三维构造模型,在构造模型的基础上,利用序贯高斯随机建模方法,建立了煤层气藏基质属性模型,为裂缝模型的建立与离散粗化奠定基础。然后,以测井解释的裂缝密度、长度、倾角、方位等统计数据为基础,在地震裂缝预测的属性体约束条件下,建立全区裂缝密度分布模型。最后,以裂缝密度分布模型为控制条件,利用离散裂缝网络技术(discrete fracture network,DFN),建立了沁端区块煤层气藏离散裂缝网络模型及其裂缝孔隙度、渗透率等属性模型。通过对模型的验证分析,认为该模型能客观真实地反应煤层气藏储层天然裂缝的几何特征和分布形态,为该区块煤层气藏数值模拟提供了地质基础和依据。
For CBM reservoir,natural fracture development,an approach of Discrete Fracture Network( DFN)model of fractured reservoir is used. For the CBM reservoir of Qinduan block as an example,first of all,the CBM reservoir three-dimensional structure model is established,on the basis of the model,using sequential gauss random modeling method,established the matrix attribute model of CBM reservoir,for laying a foundation for establishment and discrete crack model of coarsening. Then,in order to well logging interpretation of fracture density,length,angle,azimuth and other statistical data as the foundation,the seismic fracture prediction attributes constraint conditions,the distribution of fracture density model is set up. Finally,fracture density distribution models as constraint conditions,the use of Discrete Fracture Network( DFN) technology,establish the CBM reservoir in this end block discrete fracture network model and the model of the fracture porosity,permeability and other properties. Through validation of the model analysis,think that this model can objectively fairly reflect the geometrical characteristics of the natural fracture and CBM reservoir distribution pattern for the blocks in CBM reservoir numerical simulation provides a geological foundation and basis.
For CBM reservoir,natural fracture development,an approach of Discrete Fracture Network( DFN)model of fractured reservoir is used. For the CBM reservoir of Qinduan block as an example,first of all,the CBM reservoir three-dimensional structure model is established,on the basis of the model,using sequential gauss random modeling method,established the matrix attribute model of CBM reservoir,for laying a foundation for establishment and discrete crack model of coarsening. Then,in order to well logging interpretation of fracture density,length,angle,azimuth and other statistical data as the foundation,the seismic fracture prediction attributes constraint conditions,the distribution of fracture density model is set up. Finally,fracture density distribution models as constraint conditions,the use of Discrete Fracture Network( DFN) technology,establish the CBM reservoir in this end block discrete fracture network model and the model of the fracture porosity,permeability and other properties. Through validation of the model analysis,think that this model can objectively fairly reflect the geometrical characteristics of the natural fracture and CBM reservoir distribution pattern for the blocks in CBM reservoir numerical simulation provides a geological foundation and basis.
引文
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2 Chaudhary S A,Rodgerson J L,Martinez A D.Modem transmission of data for 3D fracture modeling.Journal of Petroleum Technology,1996;48(6):498—500
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4 穆龙新.裂缝储层地质模型的建立.石油勘探与开发,1995;22(6):78—82Mu Longxin.Establishment of the geological model of fractured reservoirs.Petroleum Exploration and Development,1995;22(6):78 —82
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6 郎晓玲,郭召杰.基于DFN离散裂缝网络模型的裂缝性储层建模方法.北京大学学报(自然科学版),2013;49(6):965—966Lang Xiaoling,Guo Zhaojie.Fractured reservoir modeling method based on discrete fracture network model.Acta Scientiarum Naturalium Universitatis Pekinensis,2013;49(6):965—966
7 王晖,胡光义.渤海C油田潜山裂缝型储集层随机离散裂缝网络模型的实现与优选方法.岩性油气藏,2012;24(1):74—78Wang Hui,Hu Guangyi.Realization and optimization of discrete fracture network model of buried hill fractured reservoir in C oilfield,Bohai Bay.Lithologic Reservoirs,2012;24(1):74—78
8 姚军,王子胜,张允,等.天然裂缝性油藏的离散裂缝网络数值模拟方法.石油学报,2010;31(2):284—288Yao Jun,Wang Zisheng,Zhang Yun,et al.Numerical simulation method of discrete fracture network for naturally fractured reservoirs.Acta Petrolei Sinica,2010;31(2):284—288
9 王建华.DFN模型裂缝建模新技术.断块油气田,2008;15(6):55 —58Wang Jianhua.DFN model:a new modelling technology for fracture,Fault-Block Oil&Gas Field,2008;15(6):55—58
10 唐永,梅廉夫,张春生,等.基于离散裂缝网络模型裂缝储层的随机模拟:以王窑区块为例.地质科技情报,2010;29(5):71 —77Tang Yong,Mei Lianfu,Zhang Chunsheng,et al.Stochastic modelling of fractured reservoirs based on discrete fracture network modelling:an example from Wangyao Area.Geological Science and Technology Information,2010;29(5):71—77
11 南郡祥,王素荣,姚卫华,等.鄂尔多斯盆地陇东地区延长组长6 —8特低渗透储层微裂缝研究.岩性油气藏,2007;19(4):40 —44Nan Junxiang,Wang Surong,Yao Weihua,et al.Micro-fr actur es in extr a-low permeability reservoir of Yanchang Formation in Ordos Basin.Lithologic Reservoirs,2007;19(4):40—44
2 Chaudhary S A,Rodgerson J L,Martinez A D.Modem transmission of data for 3D fracture modeling.Journal of Petroleum Technology,1996;48(6):498—500
3 杨辉廷,江同文,颜其彬,等.缝洞型碳酸盐岩储层三维地质建模方法初探.大庆石油地质与开发,2004;23(4):11—16Yang Huiting,Jiang Tongwen,Yan Qibin,et al.Establishment of 3D geological models of fracture-cavern carbonate reservoir.Daqing Petroleum Geology and Development,2004;23(4):11—16
4 穆龙新.裂缝储层地质模型的建立.石油勘探与开发,1995;22(6):78—82Mu Longxin.Establishment of the geological model of fractured reservoirs.Petroleum Exploration and Development,1995;22(6):78 —82
5 郑松青,张宏方,刘中春,等.裂缝性油藏离散裂缝网络模型.大庆石油学院学报,2011;35(6):49Zheng Songqing,Zhang Hongfang,Liu Zhongchun,et al.Discrete fracture network model for fractured reservoirs.Journal of Daqing Petroleum Institure,2011;35(6):49
6 郎晓玲,郭召杰.基于DFN离散裂缝网络模型的裂缝性储层建模方法.北京大学学报(自然科学版),2013;49(6):965—966Lang Xiaoling,Guo Zhaojie.Fractured reservoir modeling method based on discrete fracture network model.Acta Scientiarum Naturalium Universitatis Pekinensis,2013;49(6):965—966
7 王晖,胡光义.渤海C油田潜山裂缝型储集层随机离散裂缝网络模型的实现与优选方法.岩性油气藏,2012;24(1):74—78Wang Hui,Hu Guangyi.Realization and optimization of discrete fracture network model of buried hill fractured reservoir in C oilfield,Bohai Bay.Lithologic Reservoirs,2012;24(1):74—78
8 姚军,王子胜,张允,等.天然裂缝性油藏的离散裂缝网络数值模拟方法.石油学报,2010;31(2):284—288Yao Jun,Wang Zisheng,Zhang Yun,et al.Numerical simulation method of discrete fracture network for naturally fractured reservoirs.Acta Petrolei Sinica,2010;31(2):284—288
9 王建华.DFN模型裂缝建模新技术.断块油气田,2008;15(6):55 —58Wang Jianhua.DFN model:a new modelling technology for fracture,Fault-Block Oil&Gas Field,2008;15(6):55—58
10 唐永,梅廉夫,张春生,等.基于离散裂缝网络模型裂缝储层的随机模拟:以王窑区块为例.地质科技情报,2010;29(5):71 —77Tang Yong,Mei Lianfu,Zhang Chunsheng,et al.Stochastic modelling of fractured reservoirs based on discrete fracture network modelling:an example from Wangyao Area.Geological Science and Technology Information,2010;29(5):71—77
11 南郡祥,王素荣,姚卫华,等.鄂尔多斯盆地陇东地区延长组长6 —8特低渗透储层微裂缝研究.岩性油气藏,2007;19(4):40 —44Nan Junxiang,Wang Surong,Yao Weihua,et al.Micro-fr actur es in extr a-low permeability reservoir of Yanchang Formation in Ordos Basin.Lithologic Reservoirs,2007;19(4):40—44
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