麻柳场构造嘉陵江组储层测井精细解释方法研究
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摘要
目前,世界上许多大油田和高产油气井的油气来自于碳酸盐岩储集层,碳酸盐岩储层的测井解释向精细解释方向发展已成必然。本文结合西南油气田分公司蜀南气矿科研项目《麻柳场嘉陵江组气藏储层测井资料处理与解释》,对嘉陵江组储层测井精细解释作了大量的研究工作。
论文首先开展了最优化测井解释方法研究。基于测井曲线的测量误差、测井响应方程误差和多矿物模型的约束条件分析,应用最优化方法原理建立最优化测井解释模型,然后用多维搜索的变尺度法与一维搜索的抛物线法相结合的方法求解最优化方程。最后将上述方法程序化,并挂接在Forward测井解释软件平台上用于实际测井资料处理、解释中。
为解决该构造嘉陵江组储层高含水饱和度这一难题,本文采用碳酸盐岩双孔隙度解释模型,即把地层孔隙体积视为由完全由束缚水占据的微孔隙体积和有效孔隙或渗流孔隙组成。首先由压汞资料建立孔隙度与束缚水饱和度关系式,将测井解释求出的可动水饱和度用作探明储量计算。
本文基于常规测井曲线响应组合特征和部分井成像测井资料首先对麻柳场构造嘉陵江组11口井进行裂缝定性识别,并判断其裂缝类型,然后根据双侧向测井曲线计算裂缝孔隙度和裂缝渗透率等裂缝参数。
在《麻柳场嘉陵江组气藏测井精细解释实例分析》一章以麻2、麻3、麻4、麻6和麻8井为例详细介绍了本次测井精细解释的全过程。首先对各井测井资料进行环境校正、标准化等基础工作的研究,再对关键井的储层段进行“四性”关系研究,建立适合工区特征的岩性模型(岩石骨架成分及其测井响应参数),为区域解释参数的选取提供依据。最后利用收集到的岩心物性分析资料,分析化验资料、测试、钻井显示资料对解释结果进行效果分析。
论文用相渗等资料作储层物性参数下限值研究,对麻柳场嘉陵江组储层的测井解释结果进行统计。针对嘉陵江组储层高含水饱和度、低电阻率的特点,用多种方法组合对储层进行流体性质判别研究。
本文的研究成果已用于麻柳场构造嘉陵江组探明储量计算,计算结果(97.40×10~8m~3)于2003年10月29日通过了中国石油股份有限公司储委的评审验收,直接证明了本次铡井资料精细解释研究成果的实用性和可信性。
At present, since a lot of large oil fields and fertile oil wells are found in carbonate reservoir in the world, it is inevitable for the log interpretation to carbonate reservoir todevelop towards delicate interpretation. Based the research project, " Jialingjiang reservoir in Maliuchang gas field logging materials digital processing and interpretation " from South-Sichuan Gas Field of Southwest Oil and Gas Field Company, a large amount of research work about log interpretation to Jialingjiang reservoir in Maliuchang gas field has been doen in this paper.Firstly the optimization log interpretation method is researched. The paper sets up the mathematics model of optimization and log interpretation model based on the analyses about measurement error of log curves, log response equation and constraint condition. Then this paper solves the optimization equation with multidimensional search varied scale method combined with one dimension search parabolical method. Finally, it writes program in above-mentioned method and hangs it on "FORWARD" software for the use to log interpretation.In order to solve the problem in Jialingjiang reservoir in Maliuchang gas field the characteristic of high water saturation, the paper uses dual porosity interpretation model in carbonate rock, i.e., regards the formation pore space as two parts: one is micropore, which is raft of irreducible water, the other is available pore space or influent pore space. At first, it sets up the relation between porosity and irreducible water saturation, and then the mobile water saturation from log interpretation used in the calculation of proved reserves.In the research, at first, fractures and their types are identified by the combined characteristic of normal log curves and some image logging materials, and then their porosity and permeability parameters are also calculated by electrical resistivity log curve.The chapter, " The example analysis about delicate log interpretation of Jialingjiang reservoir in Maliuchang gas field ", takes M2, M3, M4, M6 and M8 wells as an example and introduces the whole course of this logging material digital processing in details. At first, it researches the basic work on each well log materials, such as environment correct, standardization research etc, and then goes on " Four Property Relation Study" with key well, sets up rock models and makes it suit for the characteristic of the area, offers reference for choosing the interpretation parameter in the area. At last, this paper uses collected materials of drill core physical property analysis, lithify, test, indication to analyse the result of the log interpretation.Lower limit value of reservoir physical property parameter is researched with relatively
permeability data in the paper, and the results of log interpretation from the Jialingjiang reservoir of Maliuchang gas field is counted. Many kinds of method are applied to identifiy the reservoir fluid property for the characteristics of low resistivity and high water saturation.Results of the research have been used to calculate proved reserves in Jialingjiang reservoir in Maliuchang gas field. And the result of calculation (97.40* 108m3) has been checked by the reserve commenting of Chinese petroleum limited liability company on October 29, 2003. So, it has proved the applicability and credibility of the results of log interpretation directly.
论文首先开展了最优化测井解释方法研究。基于测井曲线的测量误差、测井响应方程误差和多矿物模型的约束条件分析,应用最优化方法原理建立最优化测井解释模型,然后用多维搜索的变尺度法与一维搜索的抛物线法相结合的方法求解最优化方程。最后将上述方法程序化,并挂接在Forward测井解释软件平台上用于实际测井资料处理、解释中。
为解决该构造嘉陵江组储层高含水饱和度这一难题,本文采用碳酸盐岩双孔隙度解释模型,即把地层孔隙体积视为由完全由束缚水占据的微孔隙体积和有效孔隙或渗流孔隙组成。首先由压汞资料建立孔隙度与束缚水饱和度关系式,将测井解释求出的可动水饱和度用作探明储量计算。
本文基于常规测井曲线响应组合特征和部分井成像测井资料首先对麻柳场构造嘉陵江组11口井进行裂缝定性识别,并判断其裂缝类型,然后根据双侧向测井曲线计算裂缝孔隙度和裂缝渗透率等裂缝参数。
在《麻柳场嘉陵江组气藏测井精细解释实例分析》一章以麻2、麻3、麻4、麻6和麻8井为例详细介绍了本次测井精细解释的全过程。首先对各井测井资料进行环境校正、标准化等基础工作的研究,再对关键井的储层段进行“四性”关系研究,建立适合工区特征的岩性模型(岩石骨架成分及其测井响应参数),为区域解释参数的选取提供依据。最后利用收集到的岩心物性分析资料,分析化验资料、测试、钻井显示资料对解释结果进行效果分析。
论文用相渗等资料作储层物性参数下限值研究,对麻柳场嘉陵江组储层的测井解释结果进行统计。针对嘉陵江组储层高含水饱和度、低电阻率的特点,用多种方法组合对储层进行流体性质判别研究。
本文的研究成果已用于麻柳场构造嘉陵江组探明储量计算,计算结果(97.40×10~8m~3)于2003年10月29日通过了中国石油股份有限公司储委的评审验收,直接证明了本次铡井资料精细解释研究成果的实用性和可信性。
At present, since a lot of large oil fields and fertile oil wells are found in carbonate reservoir in the world, it is inevitable for the log interpretation to carbonate reservoir todevelop towards delicate interpretation. Based the research project, " Jialingjiang reservoir in Maliuchang gas field logging materials digital processing and interpretation " from South-Sichuan Gas Field of Southwest Oil and Gas Field Company, a large amount of research work about log interpretation to Jialingjiang reservoir in Maliuchang gas field has been doen in this paper.Firstly the optimization log interpretation method is researched. The paper sets up the mathematics model of optimization and log interpretation model based on the analyses about measurement error of log curves, log response equation and constraint condition. Then this paper solves the optimization equation with multidimensional search varied scale method combined with one dimension search parabolical method. Finally, it writes program in above-mentioned method and hangs it on "FORWARD" software for the use to log interpretation.In order to solve the problem in Jialingjiang reservoir in Maliuchang gas field the characteristic of high water saturation, the paper uses dual porosity interpretation model in carbonate rock, i.e., regards the formation pore space as two parts: one is micropore, which is raft of irreducible water, the other is available pore space or influent pore space. At first, it sets up the relation between porosity and irreducible water saturation, and then the mobile water saturation from log interpretation used in the calculation of proved reserves.In the research, at first, fractures and their types are identified by the combined characteristic of normal log curves and some image logging materials, and then their porosity and permeability parameters are also calculated by electrical resistivity log curve.The chapter, " The example analysis about delicate log interpretation of Jialingjiang reservoir in Maliuchang gas field ", takes M2, M3, M4, M6 and M8 wells as an example and introduces the whole course of this logging material digital processing in details. At first, it researches the basic work on each well log materials, such as environment correct, standardization research etc, and then goes on " Four Property Relation Study" with key well, sets up rock models and makes it suit for the characteristic of the area, offers reference for choosing the interpretation parameter in the area. At last, this paper uses collected materials of drill core physical property analysis, lithify, test, indication to analyse the result of the log interpretation.Lower limit value of reservoir physical property parameter is researched with relatively
permeability data in the paper, and the results of log interpretation from the Jialingjiang reservoir of Maliuchang gas field is counted. Many kinds of method are applied to identifiy the reservoir fluid property for the characteristics of low resistivity and high water saturation.Results of the research have been used to calculate proved reserves in Jialingjiang reservoir in Maliuchang gas field. And the result of calculation (97.40* 108m3) has been checked by the reserve commenting of Chinese petroleum limited liability company on October 29, 2003. So, it has proved the applicability and credibility of the results of log interpretation directly.
引文
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[2] 夏吉文、毛川勤、吴昌龙等.麻柳场气田三叠系嘉陵江组气藏探明储量报告.蜀南气矿内部报告,2003
[3] 雍世和.测井数据处理与综合解释.石油大学出版社,1996,311～312
[4] 雍世和、洪有密.测井资料综合解释与数字处理,1982
[5] 测井学编写组.测井学.石油工业出版社,1998
[6] 吴永平.千米桥潜山碳酸盐岩油气藏勘探综合评价研究.西南石油学院博士学位论文.2002,5～6
[7] 谈德辉、陈科贵等.碳酸盐岩储层岩心试验研究.西南石油学院内部科研项目报告,1999,95～96
[8] 李英.川东飞仙关组地层压力测井解释方法研究.西南石油学院硕士学位论文,2003,13～14
[9] 赵良孝等著.碳酸盐岩储层测井评价技术.石油工业出版社,1999,48～49,82～85,104～107
[10] 王辉、周承刚、孙少平.测井解释最优化方法中的误差和约束条件.中国煤田地质,2002,14(1):73
[11] 王拥军、夏宏泉、陈科贵、赵良孝、张树东.塔里木碳酸盐岩储层最优化测井解释方法研究.西南石油学院学报,2000,22(4):18～19
[12] Gysen M., Mayer C. and Hashmy K. H.. A New Approach to Log Analysis Involving Simultaneous Optimization of Unknowns and Zoned Parameters, CWLS 11th Formation Evaluation Symposium, 1987
[13] Stoffa P L, Sen M K. Nonlinear Multiparameter Optimization Using Genetic A lgorithms: Inversion of Plane-wave Seimograms. Geophysics, 1991, 56 (11): 1794～1810
[14] Mayer C. and Sibbit A.. GLOBAL—A New Approach to Computer Processed Log Interpretation, SPE 9341, 1980
[15] Alberty M. W. and Hashmy K. H.. Application of ULTRA to Log Analysis, SPELA 25th Annual Logging Symposinm transactions, 1984
[16] Meggatosta A.. Rodragueg E. and Forst E.. OPTIMA—A Statistical Approach to Well Analysis, Interpretation Symposium Petroleum Exploration in Carbonate Areas. Nanjing. China. November, 1986
[17] J. P. Marques de Sa. Pattern Recognition Concepts, Methods and Applications, 2002
[18] 张松扬等.最优化方法在松南X地区岩心数据处理中的应用.测井专刊,1996,第5辑:24～26
[19] 李丽.临南油田夏52块沙三中泥质砂岩油层的测井评价.中国地质大学硕士学位论文,2003,5～6
[20] 罗利、胡培毅、周政英.碳酸盐岩裂缝测井识别方法.石油学报,2001,22(3):32
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