鄂尔多斯盆地南缘长8储层岩石力学特征及影响因素
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摘要
鄂尔多斯盆地南缘中生界长8储层是进行油气开发的重点层位。针对长8储层砂泥岩交互,低孔低渗的特点,对其岩心样品开展了模拟地层下的岩石力学实验;利用测井资料,计算出了动态岩石力学参数并结合实验结果进行了动静态参数拟合;在岩石力学参数剖面的基础上,对岩石力学参数空间分布的影响因素进行分析。实验结果表明:三轴条件下,岩心样品均随着围压的增大,破坏强度变大,即弹性极限显著增加;随着围压的增大,岩石的抗压强度显著增加;随着围压的增大,岩石的变形显著增大。在进行自然伽马加权的情况下拟合情况较好,因此构建了较可靠的岩石力学参数剖面。影响泊松比、杨氏模量和抗压强度空间分布的主要因素为岩性、泥质含量和深度。研究成果对鄂南地区长8储层的压裂优化设计提供了重要的依据。
The Mesozoic Chang 8 is the key area for oil and gas development in the southern margin of the Ordos Basin. According to the characteristics of sandstone-mudstone interaction,low porosity and low permeability in Chang 8 reservoir,rock samples were subjected to experimental of rock mechanics under simulated strata. The failure strength of core samples were increased with the increase of confining pressure under triaxial condition,indicating that the elastic limit increased significantly. With the increase of confining pressure,the compressive strength of rock increases significantly and the deformation increased significantly. Using logging data,dynamic rock mechanics parameters were calculated and the static and dynamic parameters were fitted according to the experimental results. The results show that the fitted condition is better under the condition of weighted gamma value,so a more reliable rock mechanics parameter profile is obtained. Based on the reswlts,the factors affecting the spatial distribution of rock mechanical parameters are analyzed. Lithology,shale content and burial depth are the main factors affecting the spatial distribution of Poisson's ratio,elastic modulus and compressive strength. The research results provide an important basis for fracturing optimization design of Chang 8 reservoir in southern Ordos.
The Mesozoic Chang 8 is the key area for oil and gas development in the southern margin of the Ordos Basin. According to the characteristics of sandstone-mudstone interaction,low porosity and low permeability in Chang 8 reservoir,rock samples were subjected to experimental of rock mechanics under simulated strata. The failure strength of core samples were increased with the increase of confining pressure under triaxial condition,indicating that the elastic limit increased significantly. With the increase of confining pressure,the compressive strength of rock increases significantly and the deformation increased significantly. Using logging data,dynamic rock mechanics parameters were calculated and the static and dynamic parameters were fitted according to the experimental results. The results show that the fitted condition is better under the condition of weighted gamma value,so a more reliable rock mechanics parameter profile is obtained. Based on the reswlts,the factors affecting the spatial distribution of rock mechanical parameters are analyzed. Lithology,shale content and burial depth are the main factors affecting the spatial distribution of Poisson's ratio,elastic modulus and compressive strength. The research results provide an important basis for fracturing optimization design of Chang 8 reservoir in southern Ordos.
引文
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2王昌勇,郑荣才,李士祥,等.鄂尔多斯盆早期构造演化与沉积响应---以姬塬地区长8~长6油层组为例[J].中国地质,2010,37(1):134-143Wang Changyong,Zheng Rongcai,Li Shixiang,et al.Early tectonic evolution and sedimentary response of Ordos basin:a case study of Interval 8~Interval 6 oil layers of Yanchang Formation in Jiyuan Area[J].Chinese Geology,2010,37(1):134-143
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4郑忠文,王乾右,葛云锦,等.鄂尔多斯盆地西部延长组长8~长6段致密储层微观孔隙特征差异[J].科学技术与工程,2018,18(15):69-80Zheng Zhongwen,Wang Qianyou,Ge Yunjin,et al.Microscopic pore characteristics of tight reservoirs in Chang 8~Chang 6 member of Yanchang Formation in Western Ordos Basin[J].Science and Technology and Engineering,2018,18(15):69-80
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6周文.裂缝性油气储层评价方法[M].成都:四川科学技术出版社,1998Zhou Wen.Evaluation method for fractured reservoir[M].Chengdu:Sichuan Science and Technology Press,1998
7楼一珊,金业权.岩石力学与石油工程[M].北京:石油工业出版社2006Lou Yishan,Jin Yequan.Rock mechanics and petroleum engineering[M].Beijing:Petroleum Industry Press,2006
8李智武,罗玉宏,刘树根,等.川东北地区地层条件下致密储层力学性质实验分析[J].矿物岩石,2005,25(4):52-60Li Zhiwu,Luo Yuhong,Liu Shugen,et al.The experimental analysis of mechanical properties of compact reservoir rocks under formation conditions,northeast of Sichuan Basin,China[J].Journal of Mineralogy and Petrology,2005,25(4):52-60
9赵军龙,蔡振东,张亚旭,等.鄂尔多斯盆地C区长8储层岩石力学参数剖面建立方法[J].西安石油大学学报(自然科学版),2015,30(3):47-52Zhao Junlong,Cai Zhendong,Zhang Yaxu,et al.Study on method for establishing rock mechanics parameter profiles of Chang-8 reservoir in C area,Ordos[J].Journal of Xi'an Shiyou University(Natural Science Edition),2015,30(3):47-52
10尹帅,单钰铭,谢润成,等.柯坪塔格组下砂岩段岩石力学参数特征分析及测井解释方法[J].科学技术与工程,2013,13(26):7768-7773Yin Shuai,Shan Yuming,Xie Runcheng,et al.The parameter characteristics of lithomechanics and logging interpretation of the Lower Sandstone Member of Kalpintag Formation[J].Science and Technology and Engineering,2013,13(26):7768-7773
11徐海强.鄂尔多斯盆地樊学地区长7段储层岩石力学参数与地应力研究[D].北京:中国地质大学(北京),2018Xu Haiqiang.Study on rock mechanics parameters and In-situstress in Chang 7 member of Fan Xue area in Ordos Basin[D].Beijing:China University of Geosciences(Beijing),2018
12归榕,万永平.基于常规测井数据计算储层岩石力学参数---以鄂尔多斯盆地上古生界为例[J].地质力学学报,2012,18(4):418-424Gui Rong,Wan Yongping.Rock mechanics parameter calculaton based on conventional logging data[J].Journal of Geomechanics,2012,18(4):418-424
13冉利民.镇泾油田地应力研究及其应用[D].武汉:中国地质大学(武汉),2014Ran Limin.Study and application of crustal stress in Zhenjing Oilfield[D].Wuhan:China University of Geosciences(Wuhan),2014
14高阳,王英伟,王玉多,等.吉木萨尔凹陷芦草沟组致密储集层岩石力学特征[J].新疆石油地质,2016,37(2):158-162Gao Yang,Wang Yingwei,Wang Yuduo,et al.Rock mechanics characteristics of Lucaogou tight oil reservoir in Jimusaer Sag,Junggar Basin[J].Xinjiang Petroleum Geology,2016,37(2):158-162
15程敬华,李荣西,覃小丽,等.成岩相对低渗透储层砂岩岩石力学性质的控制---以鄂尔多斯盆地东部上古生界天然气储层为例[J].石油学报,2016,37(10):1256-1264Cheng Jinghua,Li Rongxi,Qin Xiaoli,et al.Impact of diagenetic facies on mechanical properties of sandstone rock in low-permeability reservoirs:a case study of the Upper Paleozoic gas reservoir in east Ordos Basin[J].Acta Pctrolci Sinica,2016,37(10):1256-1264
16高艳霞.川西致密储层岩石力学特性及裂缝应力敏感性研究[D].成都:成都理工大学,2008Gao Yanxia.The rock mechanical characters and fracture stress sensitivity research of dense reservoir in west Sichuan Basin[D].Chengdu:Chengdu University of Technology,2008
17杨海博,武云云.致密储层岩石的微观结构和力学性质试验分析[J].复杂油气藏,2011,4(3):10-15Yang Haibo,Wu Yunyun.The experimental analysis of microstructure and mechanical properties of tight reservoir rocks[J].Complex Hydrocarbon Reservoirs,2011,4(3):10-15
2王昌勇,郑荣才,李士祥,等.鄂尔多斯盆早期构造演化与沉积响应---以姬塬地区长8~长6油层组为例[J].中国地质,2010,37(1):134-143Wang Changyong,Zheng Rongcai,Li Shixiang,et al.Early tectonic evolution and sedimentary response of Ordos basin:a case study of Interval 8~Interval 6 oil layers of Yanchang Formation in Jiyuan Area[J].Chinese Geology,2010,37(1):134-143
3徐梦龙,何治亮,刘春燕,等.鄂尔多斯盆地镇泾区块长8储层成岩作用及孔隙演化研究[J].科学技术与工程,2015,15(5):63-69Xu Menglong,He Zhiliang,Liu Chunyan,et al.The study of diagenesis and the evolution of porosity of Chang 8 reservoir rock in Zhenjing District Ordos Basin[J].Science and Technology and Engineering,2015,15(5):63-69
4郑忠文,王乾右,葛云锦,等.鄂尔多斯盆地西部延长组长8~长6段致密储层微观孔隙特征差异[J].科学技术与工程,2018,18(15):69-80Zheng Zhongwen,Wang Qianyou,Ge Yunjin,et al.Microscopic pore characteristics of tight reservoirs in Chang 8~Chang 6 member of Yanchang Formation in Western Ordos Basin[J].Science and Technology and Engineering,2018,18(15):69-80
5王洪求,闫国亮,谢春辉,等.一种新的岩石脆性评价参数及其在致密油储层预测中的应用[C]//2015年物探技术研讨会.北京:中国石油学会,2015Wang Hongqiu,Yan Guoliang,Xie Chunhui,et al.A new evaluation parameter of rock brittleness and its application in prediction of tight oil reservoir[C]//The Symposium on Geophysical Prospecting Technology.Beijing:Chinese Petroleum Society,2015:795-798
6周文.裂缝性油气储层评价方法[M].成都:四川科学技术出版社,1998Zhou Wen.Evaluation method for fractured reservoir[M].Chengdu:Sichuan Science and Technology Press,1998
7楼一珊,金业权.岩石力学与石油工程[M].北京:石油工业出版社2006Lou Yishan,Jin Yequan.Rock mechanics and petroleum engineering[M].Beijing:Petroleum Industry Press,2006
8李智武,罗玉宏,刘树根,等.川东北地区地层条件下致密储层力学性质实验分析[J].矿物岩石,2005,25(4):52-60Li Zhiwu,Luo Yuhong,Liu Shugen,et al.The experimental analysis of mechanical properties of compact reservoir rocks under formation conditions,northeast of Sichuan Basin,China[J].Journal of Mineralogy and Petrology,2005,25(4):52-60
9赵军龙,蔡振东,张亚旭,等.鄂尔多斯盆地C区长8储层岩石力学参数剖面建立方法[J].西安石油大学学报(自然科学版),2015,30(3):47-52Zhao Junlong,Cai Zhendong,Zhang Yaxu,et al.Study on method for establishing rock mechanics parameter profiles of Chang-8 reservoir in C area,Ordos[J].Journal of Xi'an Shiyou University(Natural Science Edition),2015,30(3):47-52
10尹帅,单钰铭,谢润成,等.柯坪塔格组下砂岩段岩石力学参数特征分析及测井解释方法[J].科学技术与工程,2013,13(26):7768-7773Yin Shuai,Shan Yuming,Xie Runcheng,et al.The parameter characteristics of lithomechanics and logging interpretation of the Lower Sandstone Member of Kalpintag Formation[J].Science and Technology and Engineering,2013,13(26):7768-7773
11徐海强.鄂尔多斯盆地樊学地区长7段储层岩石力学参数与地应力研究[D].北京:中国地质大学(北京),2018Xu Haiqiang.Study on rock mechanics parameters and In-situstress in Chang 7 member of Fan Xue area in Ordos Basin[D].Beijing:China University of Geosciences(Beijing),2018
12归榕,万永平.基于常规测井数据计算储层岩石力学参数---以鄂尔多斯盆地上古生界为例[J].地质力学学报,2012,18(4):418-424Gui Rong,Wan Yongping.Rock mechanics parameter calculaton based on conventional logging data[J].Journal of Geomechanics,2012,18(4):418-424
13冉利民.镇泾油田地应力研究及其应用[D].武汉:中国地质大学(武汉),2014Ran Limin.Study and application of crustal stress in Zhenjing Oilfield[D].Wuhan:China University of Geosciences(Wuhan),2014
14高阳,王英伟,王玉多,等.吉木萨尔凹陷芦草沟组致密储集层岩石力学特征[J].新疆石油地质,2016,37(2):158-162Gao Yang,Wang Yingwei,Wang Yuduo,et al.Rock mechanics characteristics of Lucaogou tight oil reservoir in Jimusaer Sag,Junggar Basin[J].Xinjiang Petroleum Geology,2016,37(2):158-162
15程敬华,李荣西,覃小丽,等.成岩相对低渗透储层砂岩岩石力学性质的控制---以鄂尔多斯盆地东部上古生界天然气储层为例[J].石油学报,2016,37(10):1256-1264Cheng Jinghua,Li Rongxi,Qin Xiaoli,et al.Impact of diagenetic facies on mechanical properties of sandstone rock in low-permeability reservoirs:a case study of the Upper Paleozoic gas reservoir in east Ordos Basin[J].Acta Pctrolci Sinica,2016,37(10):1256-1264
16高艳霞.川西致密储层岩石力学特性及裂缝应力敏感性研究[D].成都:成都理工大学,2008Gao Yanxia.The rock mechanical characters and fracture stress sensitivity research of dense reservoir in west Sichuan Basin[D].Chengdu:Chengdu University of Technology,2008
17杨海博,武云云.致密储层岩石的微观结构和力学性质试验分析[J].复杂油气藏,2011,4(3):10-15Yang Haibo,Wu Yunyun.The experimental analysis of microstructure and mechanical properties of tight reservoir rocks[J].Complex Hydrocarbon Reservoirs,2011,4(3):10-15
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