某复杂断块油田岩性水性双重作用下的储层电性特征及测井解释评价方法
|
摘要
该油田纵向上电阻率5Ω·m的油层和电阻率200Ω·m的水层并存,油气层电阻率与水层电阻率具有较大的相交范围(5~200Ω·m),测井储层流体识别和评价困难。岩石物理、试油、测井等资料研究表明不同流体性质储层呈现如上电阻率特征的原因是储层孔隙结构和地层水性质的复杂性。孔隙结构复杂的储层具有高束缚水饱和度和相对低油气冲注的特征,从而储层导电能力增加,呈现相对低阻油气层特征。断层封堵性差异造成的天然水淹是形成该区地层水性质局部突变和形成天然水淹层相对高电阻率的测井特征的原因。针对该区孔隙结构和地层水性质的复杂局面,利用储层孔隙结构及地层水突变的测井响应特征,采取储层分类和水性分类的方法,针对不同孔隙类型和地层水性质储层采用相应的模型、参数和标准,从而客观有效的评价了该区储层流体性质。
As the resistivity of oil zone and water zone have a large scope intersection(5 ~ 200 Ω·m),the logging reservoir fluid indentification and evaluation in the field is confronted with the difficulty. Analysis with petrophysical data,logging data,test data and so on indicated that the complicated pore structure and formation water distribution control the resistivity of different fluid reservoir. The reservoir with complicated pore structure have higher irreducible water saturation and lower oil saturation,the character enhance the conductive ability of reservoir,the oil zone in the type reservoir have relatively low resistivity. The sealing of the fault made the local mutation of formation water property and formed natural water flooded phenomenon,then the fresh water flooded zone have relatively high resistivity. So the reservoir and formation water classification based on the logging response characteristics of reservoir pore structure and formation water mutations can solve the problem of reservoir fluid reservoir evaluation.
As the resistivity of oil zone and water zone have a large scope intersection(5 ~ 200 Ω·m),the logging reservoir fluid indentification and evaluation in the field is confronted with the difficulty. Analysis with petrophysical data,logging data,test data and so on indicated that the complicated pore structure and formation water distribution control the resistivity of different fluid reservoir. The reservoir with complicated pore structure have higher irreducible water saturation and lower oil saturation,the character enhance the conductive ability of reservoir,the oil zone in the type reservoir have relatively low resistivity. The sealing of the fault made the local mutation of formation water property and formed natural water flooded phenomenon,then the fresh water flooded zone have relatively high resistivity. So the reservoir and formation water classification based on the logging response characteristics of reservoir pore structure and formation water mutations can solve the problem of reservoir fluid reservoir evaluation.
引文
1毛志强,章成广.油藏条件下孔隙岩样毛管和电学性质研究.地球物理学进展,1995;10(1):76-91Mao Zhiqiang,Zhang Chengguang.The study of capillary and electrical properties of porous rock samples at reservoir conditions.Progress in Geophysics,1995;10(1):76-91
2毛志强,谭廷栋,林纯增,等.完全含水多孔岩石电学性质及其孔隙结构实验研究.石油学报,1997;18(3):51-55Mao Zhiqiang,Tan Tingdong,Lin Chunzeng,et al.The laborator studies on pore structure and electrical properties of core sample fully-saturated with brine water.Acta Petrolei Sinica,1997;18(3):51-55
3毛志强,高楚桥.孔隙结构与含油岩石电阻率性质理论模拟研究.石油勘探与开发,2000;27(2):87-90Mao Zhiqiang,Gao Chuqiao.Theoretical simulation of the resistivit and pore structure of hydrocarbon bearing rocks.Petroleum Exploration and Development,2000;27(2):87-90
4李潮流,李长喜.特低渗透率砂岩储集层电学性质研究.测井技术,2010;34(3):233-237Li Chaoliu,Li Changxi.Electrical property analysis on especiall low-permeability clastic reservoir.Well Logging Technology,2010;34(3):233-237
5唐文生,欧阳健.天然水淹油藏的测井分析.测井技术,1995;19(6):421-427Tang Wensheng,Ou Yangjian.Log analysis of natural water-ou reservoir.Well Logging Technology,1998;19(6),421-427
6迟静.水洗油层的分析与评价.西北地质,2003;36(3):80-84Chi Jing.Analysis and evaluation for oil zone washed by water.Northwestern Geology,2003;36(3),80-84
7杨春梅,周灿灿,程相志.低电阻率油层成因机理分析及有利区预测.石油勘探与开发,2008;35(5):600-605Yang Chunmei,Zhou Cancan,Cheng Xiangzhi.Origin of low resistivity pays and forecasting of favorable prospecting areas.Petroleum Exploration&Development,2008;35(5),600-605
8张庚骥.电法测井(上).北京:石油工业出版社,1996:1-20Zhang Gengji.Electric logging.Beijing:Petroleum Industry Press,1996:1-20
9高楚桥,毛志强,李进福.岩石导电效率及其与含水饱和度之间的关系.石油物探,1998;37(3):130-136Gao Chuqiao,Mao Zhiqiang,Li Jinfu.The electrical efficiency of rocks and its relationship with water saturation.Geophysical Prospecting for Petroleum,1998;37(3):130-136
10廖明光,唐洪,苏崇华,等.W低阻油藏高不动水饱和度的成因及对低阻油层的影响.石油实验地质,2010;32(4):353-361Liao Mingguang,Tang Hong,Su chonghua,et al.Genesis of high immobile water saturation in the W low resistivity reservoirs and its influence on the low resistivity reservoir.Petroleum Geology&Experiment,2010;32(4):353-361
11 Bian Huanling,Guan Ju,Mao Zhiqiang,et al.Pore structure effect on reservoir electrical properties and well logging evaluation.Applied Geophysics,2014;11(4):374-383
2毛志强,谭廷栋,林纯增,等.完全含水多孔岩石电学性质及其孔隙结构实验研究.石油学报,1997;18(3):51-55Mao Zhiqiang,Tan Tingdong,Lin Chunzeng,et al.The laborator studies on pore structure and electrical properties of core sample fully-saturated with brine water.Acta Petrolei Sinica,1997;18(3):51-55
3毛志强,高楚桥.孔隙结构与含油岩石电阻率性质理论模拟研究.石油勘探与开发,2000;27(2):87-90Mao Zhiqiang,Gao Chuqiao.Theoretical simulation of the resistivit and pore structure of hydrocarbon bearing rocks.Petroleum Exploration and Development,2000;27(2):87-90
4李潮流,李长喜.特低渗透率砂岩储集层电学性质研究.测井技术,2010;34(3):233-237Li Chaoliu,Li Changxi.Electrical property analysis on especiall low-permeability clastic reservoir.Well Logging Technology,2010;34(3):233-237
5唐文生,欧阳健.天然水淹油藏的测井分析.测井技术,1995;19(6):421-427Tang Wensheng,Ou Yangjian.Log analysis of natural water-ou reservoir.Well Logging Technology,1998;19(6),421-427
6迟静.水洗油层的分析与评价.西北地质,2003;36(3):80-84Chi Jing.Analysis and evaluation for oil zone washed by water.Northwestern Geology,2003;36(3),80-84
7杨春梅,周灿灿,程相志.低电阻率油层成因机理分析及有利区预测.石油勘探与开发,2008;35(5):600-605Yang Chunmei,Zhou Cancan,Cheng Xiangzhi.Origin of low resistivity pays and forecasting of favorable prospecting areas.Petroleum Exploration&Development,2008;35(5),600-605
8张庚骥.电法测井(上).北京:石油工业出版社,1996:1-20Zhang Gengji.Electric logging.Beijing:Petroleum Industry Press,1996:1-20
9高楚桥,毛志强,李进福.岩石导电效率及其与含水饱和度之间的关系.石油物探,1998;37(3):130-136Gao Chuqiao,Mao Zhiqiang,Li Jinfu.The electrical efficiency of rocks and its relationship with water saturation.Geophysical Prospecting for Petroleum,1998;37(3):130-136
10廖明光,唐洪,苏崇华,等.W低阻油藏高不动水饱和度的成因及对低阻油层的影响.石油实验地质,2010;32(4):353-361Liao Mingguang,Tang Hong,Su chonghua,et al.Genesis of high immobile water saturation in the W low resistivity reservoirs and its influence on the low resistivity reservoir.Petroleum Geology&Experiment,2010;32(4):353-361
11 Bian Huanling,Guan Ju,Mao Zhiqiang,et al.Pore structure effect on reservoir electrical properties and well logging evaluation.Applied Geophysics,2014;11(4):374-383