柿庄南区块煤层气储层精细评价及其应用
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摘要
综合煤层气勘探开发动静态数据,从资源品质、可采性和可压裂性等方面对柿庄南区块煤储层进行了精细评价,借助多层次模糊评价技术,开展了煤储层有利区综合评价,并将评价结果应用于提产实践中。柿庄南区块3#煤层的I类煤储层主要集中在中部地区,沿NNE向呈条带状分布,III类储层分布于北部和南部地区,其他地区为Ⅱ类储层。生产动态分析显示,74%的高产气井和60%的中产气井集中分布在I类煤储层有利评价区,17%的高产气井和35%的中产气井分布在II类煤储层有利评价区。结合区域构造特征,划分出3个一级地质单元、9个二级地质单元和23个三级地质单元,落实研究区中部为提产有利区,面积达61.45 km~2。根据高产井动态分析,对12口低效井进行了排采制度优化,其中10口井提产2倍以上。
Fine reservoir evaluation has been conducted on the coalbed methane reservoirs of the Shizhuangnan block in terms of resource quality,recoverability,possibility for fracturing,etc.,in combination with the dynamic and static data of coalbed methane exploration and development,and further,the multi-layer fuzzy evaluation technology has been employed for comprehensive evaluation of favorable zones of coalbed methane reservoirs,from which evaluation results have been applied in practices. With the No. 3 reservoir in the Shizhuangnan block as an example,its I-type reservoirs are located mainly in the central area,extending towards NNE as strips,its III-type reservoirs in the north and south and other areas are classified as the II-type. The analysis of production dynamics indicates that 74% highproduction gas wells and 60% middle-production gas wells concentrate in the favorable reservoirs of the I-type coalbed methane reservoirs and 17% high-production and 35% middle-production ones in the favorable area of the II-type coalbed methane reservoirs. Then the regional structure characteristics are combined to divide the area into three firstlevel geological units,nine secondary geological units,and 23 tertiary geological units and the central area was defined as the favorable production increase area with its area up to 61. 45 km~2. Based on the dynamic analysis of highproduction wells,12 low efficiency wells were selected for optimization of the production system,with production of10 wells increased by more than 2 times.
Fine reservoir evaluation has been conducted on the coalbed methane reservoirs of the Shizhuangnan block in terms of resource quality,recoverability,possibility for fracturing,etc.,in combination with the dynamic and static data of coalbed methane exploration and development,and further,the multi-layer fuzzy evaluation technology has been employed for comprehensive evaluation of favorable zones of coalbed methane reservoirs,from which evaluation results have been applied in practices. With the No. 3 reservoir in the Shizhuangnan block as an example,its I-type reservoirs are located mainly in the central area,extending towards NNE as strips,its III-type reservoirs in the north and south and other areas are classified as the II-type. The analysis of production dynamics indicates that 74% highproduction gas wells and 60% middle-production gas wells concentrate in the favorable reservoirs of the I-type coalbed methane reservoirs and 17% high-production and 35% middle-production ones in the favorable area of the II-type coalbed methane reservoirs. Then the regional structure characteristics are combined to divide the area into three firstlevel geological units,nine secondary geological units,and 23 tertiary geological units and the central area was defined as the favorable production increase area with its area up to 61. 45 km~2. Based on the dynamic analysis of highproduction wells,12 low efficiency wells were selected for optimization of the production system,with production of10 wells increased by more than 2 times.
引文
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[15]连承波,钟建华,赵永军,等.基于试井资料分析的煤储层渗透率定量预测模型[J].辽宁工程技术大学学报(自然科学版),2008,27(4):481-484.LIAN Chengbo,ZHONG Jianhua,ZHAO Yongjun,et al.Prediction of coal reservoir permeability based on analysis of well test data[J].Journal of Liaoning Technical University(Natural Science),2008,27(4):481-484.
[16]龙王寅,朱文伟,徐静,等.利用测井曲线判识煤体结构探讨[J].中国煤田地质,1999,11(3):64-69.LONG Wangyin,ZHU Wenwei,XU Jing,et al.Discussion of coal body structure based on logging curves[J].Coal Geology of China,1999,11(3):64-69.
[17]孟召平,刘姗姗,王保玉,等.晋城矿区煤体结构及其测井响应特征研究[J].煤炭科学技术,2015,43(2):58-63.MENG Zhaoping,LIU Shanshan,WANG Baoyu,et al.Study of feature of coal body structure and logging response in Jincheng Mining Area[J].Coal Science and Technology,2015,43(2):58-63.
[18]汤友谊,孙四清,郭纯,等.不同煤体结构类型煤分层视电阻率值的测试[J].煤炭科学技术,2005,33(3):70-73.TANG Youyi,SUN Siqing,GUO Chun,et al.Measurement of apparent resistivity value for coal slices of different seam structures[J].Coal Science and Technology,2005,33(3):70-73.
[2]姚纪明,于炳松,车长波,等.中国煤层气有利区带综合评价[J].现代地质,2009,23(2):353-358.YAO Jiming,YU Bingsong,CHE Changbo,et al.Study of comprehensive evaluation of coalbed methane zone in China[J].Geoscience,2009,23(2):353-358.
[3]许浩,汤达祯,唐书恒,等.鄂尔多斯盆地西部侏罗系煤储层特征及有利区预测[J].煤田地质与勘探,2010,38(1):26-29.XU Hao,TANG Dazhen,TANG Shuheng,et al.Coal reservoir characteristics and prospective areas for Jurissic CBM exploitation in western Ordos basin[J].Coal Geolgoy and Exploration,2010,38(1):26-29.
[4]傅雪海,秦勇,李贵中,等.沁水盆地中-南部煤储层渗透率主控因素分析[J].煤田地质与勘探,2001,29(3):16-19.FU Xuehai,QIN Yong,LI Guizhong,et al.An analysis of the principal control factor of coal reservoir permeability in central and southern Qinshui Basin[J].Coal Geolgoy and Exploration,2001,29(3):16-19.
[5]王明寿,汤达祯,魏永佩,等.沁水盆地北端煤层气储层特征及富集机制[J].石油实验地质,2006,28(5):440-444.WANG Mingshou,TANG Dazhen,WEI Yongpei,et al.Reservoir characteristics and enrichment mechanism of the coalbed gas in the north of Qinshui Basin[J].Petroleum Geology&Experiment,2006,28(5):440-444.
[6]刘之的,赵靖舟,时保宏,等.煤层气储层“三品质”测井定量评价方法研究[J].天然气地球科学,2015,26(5):966-978.LIU Zhidi,ZHAO Jingzhou,SHI Baohong,et al.Study on the method of quantitative evaluation for“three qualities”of CBM reservoir using logging data[J].Natural Gas Geoscience,2015,26(5):966-978.
[7]金泽亮,薛海飞,高海滨,等.煤层气储层测井评价技术及应用[J].煤田地质与勘探,2013,41(2):43-45.JIN Zeliang,XUE Haifei,GAO Haibin,et al.Technology for evaluation of CBM reservoir logging and its application[J].Coal Geology and Exploration,2013,41(2):43-45.
[8]刘之的,杨秀春,陈彩红,等.鄂东气田煤层气储层测井综合评价方法研究[J].测井技术,2013,37(3):289-293.LIU Zhidi,YANG Xiuchun,CHEN Caihong,et al.Comprehensive log evaluation for coalbed methane reservoir in Eastern block of Ordos Basin[J].Well Logging Technology,2013,37(3):289-293.
[9]徐刚,杜文凤,冀超辉,等.基于证据理论的煤层气储层评价方法[J].煤田地质与勘探,2010,38(4):30-37.XU Gang,DU Wenfeng,JI Chaohui,et al.Evaluation method of coalbed methane reservoirs based on evidence theory[J].Coal Geology and Exploration,2010,38(4):30-37.
[10]赵毅,毛志强,孙伟,等.煤层气储层非常规测井资料评价方法研究[J].测井技术,2011,35(5):441-446.ZHAO Yi,MAO Zhiqiang,SUN Wei,et al.Evaluation method for unconventional log data of CBM reservoir[J].Well Logging Technology,2011,35(5):441-446.
[11]陈信平,霍全明,林建东,等.煤层气储层含气量与其弹性参数之间的关系[J].地球物理学报,2013,56(8):2838-2848.CHEN Xinping,HUO Quanming,LIN Jiandong,et al.The relation between CBM content and the elastic parameters of CBM reservoirs[J].Chinese Journal of Geophysics,2013,56(8):2838-2848.
[12]孔锐,张哨楠.煤层气储层评价方法的选择[J].地质通报,2012,31(4):586-593.KONG Rui,ZHANG Shaonan.The selection of evaluation methods for coalbed methane reservoirs[J].Geological Bulletin of China,2012,31(4):586-593.
[13]连承波,李汉林.地应力对煤储层渗透率影响的机理研究[J].煤田地质与勘探,2005,33(2):30-32.LIAN Chengbo,LI Hanlin.Mechanism research about effect of insitu stress on coal seam permeability[J].Coal Geology and Exploration,2005,33(2):30-32.
[14]孟召平,蓝强,刘翠丽,等.鄂尔多斯盆地东南缘地应力、储层压力及其耦合关系[J].煤炭学报,2013,38(1):122-128.MENG Zhaoping,LAN Qiang,LIU Cuili,et al.In-situ stress and coal reservoir pressure in Southeast margin of Ordos basin and their coupling relations[J].Journal of China Coal Society,2013,38(1):122-128.
[15]连承波,钟建华,赵永军,等.基于试井资料分析的煤储层渗透率定量预测模型[J].辽宁工程技术大学学报(自然科学版),2008,27(4):481-484.LIAN Chengbo,ZHONG Jianhua,ZHAO Yongjun,et al.Prediction of coal reservoir permeability based on analysis of well test data[J].Journal of Liaoning Technical University(Natural Science),2008,27(4):481-484.
[16]龙王寅,朱文伟,徐静,等.利用测井曲线判识煤体结构探讨[J].中国煤田地质,1999,11(3):64-69.LONG Wangyin,ZHU Wenwei,XU Jing,et al.Discussion of coal body structure based on logging curves[J].Coal Geology of China,1999,11(3):64-69.
[17]孟召平,刘姗姗,王保玉,等.晋城矿区煤体结构及其测井响应特征研究[J].煤炭科学技术,2015,43(2):58-63.MENG Zhaoping,LIU Shanshan,WANG Baoyu,et al.Study of feature of coal body structure and logging response in Jincheng Mining Area[J].Coal Science and Technology,2015,43(2):58-63.
[18]汤友谊,孙四清,郭纯,等.不同煤体结构类型煤分层视电阻率值的测试[J].煤炭科学技术,2005,33(3):70-73.TANG Youyi,SUN Siqing,GUO Chun,et al.Measurement of apparent resistivity value for coal slices of different seam structures[J].Coal Science and Technology,2005,33(3):70-73.