砂西中浅层复杂断块油藏精细描述与调整思路
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摘要
复杂断块油藏在我国广泛分布,地位重要,但其油气分布复杂、开发调整难度较高。为探讨此类油藏调整思路,以柴达木盆地砂西N1—N21复杂断块油藏为例,采用以构造为核心的油藏精细描述,通过应力分析确定油藏构造格局、多方法联合精细地震解释和成图较好地体现了油藏构造特征。以油砂体预测为核心的油藏评价,通过沉积相研究预测砂体分布,基于构造格架以断块为单元预测油砂体分布,进而以油砂体为单元进行油藏评价。以增加动用程度、完善注采关系,特别是以主力小层的注采完善为核心的油藏开发调整方向,适应于该类油藏的特点,为稳定油藏产量,提高采收率指明了方向。
Complex fault-block oil reservoirs are very common in China and they play a very important role in the petroleum production.It is very difficult for this kind of reservoir to develop because of its complex oil and water distribution.In order to get a good adjustment method,Shaxi N1-N21 complex fault-block oil reservoirs in Qaidam Basin were studied.A series of thoughtways focusing on the faults were developed for the fault-block oil reservoirs.Reservoir tectonics were characterized through the structural stress analysis and detailed structure mapping,oil-bearing sand bodies distribution were predicted and evaluated based on the facies analysis and fault block analysis.The adjustment methods were discussed to increase the exploitation degree and improve the injection-production relationship,especially for the main layers.A good foundation was provided for the reservoir development and the direction of improving the oil recovery was made clear.
Complex fault-block oil reservoirs are very common in China and they play a very important role in the petroleum production.It is very difficult for this kind of reservoir to develop because of its complex oil and water distribution.In order to get a good adjustment method,Shaxi N1-N21 complex fault-block oil reservoirs in Qaidam Basin were studied.A series of thoughtways focusing on the faults were developed for the fault-block oil reservoirs.Reservoir tectonics were characterized through the structural stress analysis and detailed structure mapping,oil-bearing sand bodies distribution were predicted and evaluated based on the facies analysis and fault block analysis.The adjustment methods were discussed to increase the exploitation degree and improve the injection-production relationship,especially for the main layers.A good foundation was provided for the reservoir development and the direction of improving the oil recovery was made clear.
引文
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[9]周林帅,张卫海,黄峰,等.断裂带充填物中泥质质量分数的确定及断层封闭性评价[J].断块油气田,2010,17(2):173-176.Zhou Linshuai,Zhang Weihai,Huang Feng,et al.Determination ofshale content in fault filling material and evaluation of fault sealing[J].Fault-Block Oil&Gas Field,2010,17(2):173-176.
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[11]黄新文,曾德仁,陈洁.利用定向钻井技术提高断块油田勘探开发效益[J].断块油气田,2000,7(2):44-47.Huang Xinwen,Zeng Deren,Chen Jie.Increasing the benefit of faultblock oil field exploration and development using directional drilling[J].Fault-Block Oil&Gas Field,2000,7(2):44-47.
[12]尹太举,张昌民,赵红静.复杂断块区高含水期剩余油分布预测[J].石油实验地质,2004,26(3):267-272.Yin Taiju,Zhang Changmin,Zhao Hongjing.Prediction of residual oildistribution in complex fault-block districts during high water-bearing periods[J].Petroleum Geology&Expeximent,2004,26(3):267-272.
[2]谢向阳,邓俊国,信荃麟.东辛油田断块模式及油气富集规律[J].石油勘探与开发,1997,24(2):25-27.Xie Xiangyang,Deng Junguo,Xin Quanlin.Fault-block modes andhydrocarbon accumulation in Dongxin Oilfield[J].Petroleum Explorationand Development,1997,24(2):25-27.
[3]季静,宗杰,刘安元,等.复杂断块油藏组合模式研究与应用.断块油气田[J].断块油气田,2010,17(1):35-37.Ji Jing,Zong Jie,Liu Anyuan,et al.Study and application of combinedpattern of complex fault block reservoir[J].Fault-Block Oil&GasField,2010,17(1):35-37.
[4]王承毅.应用探边测试方法对断块油气藏进行早期评价[J].断块油气田,1999,6(1):34-39.Wang Chengyi.Application of prospecting boundary method to earlytime estimation for a block oil gas reservoir[J].Fault-Block Oil&Gas Field,1999,6(1):34-39.
[5]韩大匡,贾文瑞.中国油气田开发特征与技术发展[J].断块油气田,1996,3(3):1-7.Han Dakuang,Jia Wenrui.The development features and techniquedevelopment of oil&gas fields in China[J].Fault-Block Oil&GasField,1996,3(3):1-7.
[6]马丽娟,金之钧.复杂断块构造的精细解释[J].石油地球物理勘探,2005,40(6):687-691.Ma Lijuan,Jin Zhijun.Fine interpretation of complex fault-blockstructure[J].Oil Geophysical Prospecting,2005,40(6):687-691.
[7]毛凤鸣,陈安定,严元锋,等.苏北盆地复杂小断块油气成藏特征及地震识别技术[J].石油与天然气地质,2006,27(6):827-839.Mao Fengming,Chen Anding,Yan Yuanfeng,et al.Hydrocarbonpooling features and seismic recognizing technologies of smallcomplex fault blocks in Subei Basin[J].Oil&Gas Geology,2006,27(6):827-839.
[8]张琴,唐颖,张建丽,等.永安地区断层封堵性研究[J].断块油气田,2010,17(4):402-404.Zhang Qin,Tang Ying,Zhang Jianli,et al.Study on fault sealing inYongan Area[J].Fault-Block Oil&Gas Field,2010,17(4):402-404.
[9]周林帅,张卫海,黄峰,等.断裂带充填物中泥质质量分数的确定及断层封闭性评价[J].断块油气田,2010,17(2):173-176.Zhou Linshuai,Zhang Weihai,Huang Feng,et al.Determination ofshale content in fault filling material and evaluation of fault sealing[J].Fault-Block Oil&Gas Field,2010,17(2):173-176.
[10]王瑞宇,李琦,王文忠.双靶定向井在断块油气田开发调整中的效果分析[J].断块油气田,2000,7(1):57-59.Wang Ruiyu,Li Qi,Wang Wenzhong.The effect analysis of twintargets directional well for adjustment of fault-block oilfielddevelopment[J].Fault-Block Oil&Gas Field,2000,7(1):57-59.
[11]黄新文,曾德仁,陈洁.利用定向钻井技术提高断块油田勘探开发效益[J].断块油气田,2000,7(2):44-47.Huang Xinwen,Zeng Deren,Chen Jie.Increasing the benefit of faultblock oil field exploration and development using directional drilling[J].Fault-Block Oil&Gas Field,2000,7(2):44-47.
[12]尹太举,张昌民,赵红静.复杂断块区高含水期剩余油分布预测[J].石油实验地质,2004,26(3):267-272.Yin Taiju,Zhang Changmin,Zhao Hongjing.Prediction of residual oildistribution in complex fault-block districts during high water-bearing periods[J].Petroleum Geology&Expeximent,2004,26(3):267-272.
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