临兴地区砂岩含气特征及其主控因素
|
摘要
鄂尔多斯盆地东缘临兴地区致密砂岩气资源丰富。为了明确该区砂岩含气量的主要控制因素,针对砂岩孔隙度、含气饱和度、砂岩埋深、盖层排替压力、泥质含量、储层压力等6个影响因素,采用灰色关联分析法进行统计分析。结果显示:临兴地区砂岩含气量影响因素与含气量之间的关联度变化在0.245 2~0.788 8,表明上述影响因素对含气量均有一定程度影响;其中砂岩孔隙度与含气量之间的关联度最大(0.788 8),其次为含气饱和度(关联度0.577 9),表明该区砂岩含气量主要受砂岩孔隙度和砂岩含气饱和度的影响。据此优选出3个天然气成藏有利区:赵家坪乡LX4-LX7井区、圪垯上乡LX2-LX8以西区域和兔坂镇LX1-TB05周边区域。
The tight sandstone gas resources are abundant in Linxing area of the eastern margin of Ordos Basin.In order to pinpoint the main controlling factors of sandstone gas content in this area,six influence factors were analyzed by Grey correlation analysis,including sandstone porosity,gas saturation,buried depth of sandstone,displacement pressure of caprock,shale content and reservoir pressure.The results show that the correlation between sandstone gas content and its influence factors vary from 0.245 2 to 0.788 8 in Linxing area,indicating that all the above factors have a certain impact on gas content.The correlation between sandstone porosity and gas content is the highest(0.788 8),followed by gas saturation(correlation degree 0.577 9).This means that the sandstone gas content in this area is mainly affected by sandstone porosity and sandstone gas saturation.Based on these results,three favorable areas for gas accumulation were optimized:The LX4-LX7 well area in Zhaojiaping town,the LX2-LX8 well area in the west of Gedashang town and the LX1-TB05 well area in the surrounding areas of Tuban town.
The tight sandstone gas resources are abundant in Linxing area of the eastern margin of Ordos Basin.In order to pinpoint the main controlling factors of sandstone gas content in this area,six influence factors were analyzed by Grey correlation analysis,including sandstone porosity,gas saturation,buried depth of sandstone,displacement pressure of caprock,shale content and reservoir pressure.The results show that the correlation between sandstone gas content and its influence factors vary from 0.245 2 to 0.788 8 in Linxing area,indicating that all the above factors have a certain impact on gas content.The correlation between sandstone porosity and gas content is the highest(0.788 8),followed by gas saturation(correlation degree 0.577 9).This means that the sandstone gas content in this area is mainly affected by sandstone porosity and sandstone gas saturation.Based on these results,three favorable areas for gas accumulation were optimized:The LX4-LX7 well area in Zhaojiaping town,the LX2-LX8 well area in the west of Gedashang town and the LX1-TB05 well area in the surrounding areas of Tuban town.
引文
[1]屈绍忠,林建东.浅谈煤层气与游离气共同开发新思路[J].中国煤炭地质,2013,25(2):64-70.QU Shaozhong,LIN Jiandong.A discussion on new ideas in CBM and free gas joint exploitation[J].Coal Geology of China,2013,25(2):64-70.
[2]戴金星,钟宁宁,刘德汉,等.中国煤成大中型气田地质基础和主控因素[M].北京:石油工业出版社,2000.
[3]汪正江,陈洪德,张锦泉.鄂尔多斯盆地晚古生代沉积体系演化与煤成气藏[J].沉积与特提斯地质,2002,22(2):18-23.WANG Zhengjiang,CHEN Hongde,ZHANG Jinquan.The Late Palaeozoic sedimentary systems and humic gas pools in the Ordos Basin[J].Sedimentary Geology and Tethyan Geology,2002,22(2):18-23.
[4]秦勇,梁建设,申建,等.沁水盆地南部致密砂岩和页岩的气测显示与气藏类型[J].煤炭学报,2014,39(8):1559-1565.QIN Yong,LIANG Jianshe,SHEN Jian,et al.Gas logging shows and gas reservoir types in tight sandstones and shales from southern of Qinshui basin[J].Journal of Coal Science,2014,39(8):1559-1565.
[5]OLSON T,HOBBS B,BROOKS R,et al.Paying off for Tom Brown in White River Dom Field’s tight sandstone,deep coals[R].The American Oil and Gas Reports,2002:67-75.
[6]谢英刚,孟尚志,高丽军,等.临兴地区深部煤层气及致密砂岩气资源潜力评价[J].煤炭科学技术,2015,43(2):21-24.XIE Yinggang,MENG Shangzhi,GAO Lijun,et al.Assessments on potential resources of deep coalbed methane and compact sandstone gas in Linxing area[J].Coal Science and Technology,2015,43(2):21-24.
[7]李勇,汤达祯,许浩,等.鄂尔多斯盆地东缘“翘板”支点影响下的含煤地层发育特征[J].煤炭学报,2012,37(增2):378-382.LI Yong,TANG Dazhen,XU Hao,et al.Characterization of coal bearing strata under influence of“seesaw”fulcrum in east margin of Ordos basin[J].Journal of China Coal Society,2012,37(S2):378-382.
[8]魏红红,彭惠群,李静群,等.鄂尔多斯盆地中部石炭―二叠系沉积相带与砂体展布[J].沉积学报,1999,17(3):403-408.WEI Honghong,PENG Huiqun,LI Jingqun,et al.Distribution of sedimentary facies belts and sandstone bodies of Permian Carboniferous in the central part of Ordos basin[J].Acta Sedimentologica Sinica,1999,17(3):403-408.
[9]LI Z,HAN M,LI J,et al.On the analysis of the high-resolution sequence stratigraphy and coal accumulating law of Jurassic in Ordos Basin[J].Journal of Coal Science and Engineering,2008,14(1):85-91.
[10]鲁静,邵龙义,孙斌,等.鄂尔多斯盆地东缘石炭-二叠纪煤系层序-古地理与聚煤作用[J].煤炭学报,2012,37(5):747-754.LU Jing,SHAO Longyi,SUN Bin,et al.Sequencepaleogeography and coal accumulation of Carboniferous-Permian coal measures in the Eastern Ordos basin[J].Journal of China Coal Society,2012,37(5):747-754.
[11]任战利,张盛,高胜利,等.鄂尔多斯盆地构造热演化史及其成藏成矿意义[J].中国科学:地球科学,2007,37(增1):23-32.
[12]何义中,陈洪德,张锦泉.鄂尔多斯盆地中部石炭-二叠系两类三角洲沉积机理探讨[J].石油与天然气地质,2001,22(1):68-71.HE Yizhong,CHEN Hongde,ZHANG Jinquan.Discussion on sedimentation mechanism of two kind of deltas from Permian-Carboniferous of central Ordos basin[J].Oil&Gas Geology,2001,22(1):68-71.
[13]宋子齐,谭成仟.灰色理论油气储层评价[M].北京:石油工业出版社,1995.
[14]叶青,林柏泉.灰色理论在煤层瓦斯含量预测中的应用[J].矿业快报,2006,25(7):28-30.YE Qing,LIN Baiquan.Application of Grey theory in predicting gas content in coal seam[J].Express Information of Mining Industry,2006,25(7):28-30.
[15]连承波,赵永军,渠芳,等.影响煤层含气量地质因素的定量分析[J].特种油气藏,2008,15(3):33-36.
[16]胡咤咤,黄文辉,许启鲁,等.柿庄北区块3号煤含气量影响因素关联性分析[J].科技通报,2016,32(7):36-42.HU Zhazha,HUANG Wenhui,XU Qilu,et al.The correlation analysis of influence factors of coalbed methane content in No.3coalbed of Northern Shizhuang Block[J].Bulletin of Science and Technology,2016,32(7):36-42.
[17]申卯兴,薛西锋,张小水.灰色关联分析中分辨系数的选取[J].空军工程大学学报(自然科学版),2003,4(1):68-70.SHEN Maoxing,XUE Xifeng,ZHANG Xiaoshui.Determination of discrimination coefficient in grey incidence analysis[J].Journal of Air Force Engineering University(Natural Science Edition),2003,4(1):68-70.
[18]谢英刚,秦勇,叶建平,等.临兴地区上古生界煤系致密砂岩气成藏条件分析[J].煤炭学报,2016,41(1):181-191.XIE Yinggang,QIN Yong,YE Jianping,et al.Accumulation conditions of tight gas in the Upper Paleozoic of Linxing Block[J].Journal of China Coal Society,2016,41(1):181-191.
[19]林玉祥,栾伟娜,韩继雷,等.沁水盆地砂岩游离气成藏主控因素分析[J].天然气地球科学,2015,26(10):1873-1882.LIN Yuxiang,LUAN Weina,HAN Jilei,et al.Main controlling factors on sandstone free gas accumulation in the Qinshui Basin[J].Natural Gas Geoscience,2015,26(10):1873-1882.
[20]赵明华,李治平,郭艳东,等.灰色关联分析在储层潜力区划分中的应用[J].油气地质与采收率,2009,16(3):15-17.ZHAO Minghua,LI Zhiping,GUO Yandong,et al.Application of grey relation analysis in reservoir potential region division[J].Petroleum Geology and Recovery Efficiency,2009,16(3):15-17.
[2]戴金星,钟宁宁,刘德汉,等.中国煤成大中型气田地质基础和主控因素[M].北京:石油工业出版社,2000.
[3]汪正江,陈洪德,张锦泉.鄂尔多斯盆地晚古生代沉积体系演化与煤成气藏[J].沉积与特提斯地质,2002,22(2):18-23.WANG Zhengjiang,CHEN Hongde,ZHANG Jinquan.The Late Palaeozoic sedimentary systems and humic gas pools in the Ordos Basin[J].Sedimentary Geology and Tethyan Geology,2002,22(2):18-23.
[4]秦勇,梁建设,申建,等.沁水盆地南部致密砂岩和页岩的气测显示与气藏类型[J].煤炭学报,2014,39(8):1559-1565.QIN Yong,LIANG Jianshe,SHEN Jian,et al.Gas logging shows and gas reservoir types in tight sandstones and shales from southern of Qinshui basin[J].Journal of Coal Science,2014,39(8):1559-1565.
[5]OLSON T,HOBBS B,BROOKS R,et al.Paying off for Tom Brown in White River Dom Field’s tight sandstone,deep coals[R].The American Oil and Gas Reports,2002:67-75.
[6]谢英刚,孟尚志,高丽军,等.临兴地区深部煤层气及致密砂岩气资源潜力评价[J].煤炭科学技术,2015,43(2):21-24.XIE Yinggang,MENG Shangzhi,GAO Lijun,et al.Assessments on potential resources of deep coalbed methane and compact sandstone gas in Linxing area[J].Coal Science and Technology,2015,43(2):21-24.
[7]李勇,汤达祯,许浩,等.鄂尔多斯盆地东缘“翘板”支点影响下的含煤地层发育特征[J].煤炭学报,2012,37(增2):378-382.LI Yong,TANG Dazhen,XU Hao,et al.Characterization of coal bearing strata under influence of“seesaw”fulcrum in east margin of Ordos basin[J].Journal of China Coal Society,2012,37(S2):378-382.
[8]魏红红,彭惠群,李静群,等.鄂尔多斯盆地中部石炭―二叠系沉积相带与砂体展布[J].沉积学报,1999,17(3):403-408.WEI Honghong,PENG Huiqun,LI Jingqun,et al.Distribution of sedimentary facies belts and sandstone bodies of Permian Carboniferous in the central part of Ordos basin[J].Acta Sedimentologica Sinica,1999,17(3):403-408.
[9]LI Z,HAN M,LI J,et al.On the analysis of the high-resolution sequence stratigraphy and coal accumulating law of Jurassic in Ordos Basin[J].Journal of Coal Science and Engineering,2008,14(1):85-91.
[10]鲁静,邵龙义,孙斌,等.鄂尔多斯盆地东缘石炭-二叠纪煤系层序-古地理与聚煤作用[J].煤炭学报,2012,37(5):747-754.LU Jing,SHAO Longyi,SUN Bin,et al.Sequencepaleogeography and coal accumulation of Carboniferous-Permian coal measures in the Eastern Ordos basin[J].Journal of China Coal Society,2012,37(5):747-754.
[11]任战利,张盛,高胜利,等.鄂尔多斯盆地构造热演化史及其成藏成矿意义[J].中国科学:地球科学,2007,37(增1):23-32.
[12]何义中,陈洪德,张锦泉.鄂尔多斯盆地中部石炭-二叠系两类三角洲沉积机理探讨[J].石油与天然气地质,2001,22(1):68-71.HE Yizhong,CHEN Hongde,ZHANG Jinquan.Discussion on sedimentation mechanism of two kind of deltas from Permian-Carboniferous of central Ordos basin[J].Oil&Gas Geology,2001,22(1):68-71.
[13]宋子齐,谭成仟.灰色理论油气储层评价[M].北京:石油工业出版社,1995.
[14]叶青,林柏泉.灰色理论在煤层瓦斯含量预测中的应用[J].矿业快报,2006,25(7):28-30.YE Qing,LIN Baiquan.Application of Grey theory in predicting gas content in coal seam[J].Express Information of Mining Industry,2006,25(7):28-30.
[15]连承波,赵永军,渠芳,等.影响煤层含气量地质因素的定量分析[J].特种油气藏,2008,15(3):33-36.
[16]胡咤咤,黄文辉,许启鲁,等.柿庄北区块3号煤含气量影响因素关联性分析[J].科技通报,2016,32(7):36-42.HU Zhazha,HUANG Wenhui,XU Qilu,et al.The correlation analysis of influence factors of coalbed methane content in No.3coalbed of Northern Shizhuang Block[J].Bulletin of Science and Technology,2016,32(7):36-42.
[17]申卯兴,薛西锋,张小水.灰色关联分析中分辨系数的选取[J].空军工程大学学报(自然科学版),2003,4(1):68-70.SHEN Maoxing,XUE Xifeng,ZHANG Xiaoshui.Determination of discrimination coefficient in grey incidence analysis[J].Journal of Air Force Engineering University(Natural Science Edition),2003,4(1):68-70.
[18]谢英刚,秦勇,叶建平,等.临兴地区上古生界煤系致密砂岩气成藏条件分析[J].煤炭学报,2016,41(1):181-191.XIE Yinggang,QIN Yong,YE Jianping,et al.Accumulation conditions of tight gas in the Upper Paleozoic of Linxing Block[J].Journal of China Coal Society,2016,41(1):181-191.
[19]林玉祥,栾伟娜,韩继雷,等.沁水盆地砂岩游离气成藏主控因素分析[J].天然气地球科学,2015,26(10):1873-1882.LIN Yuxiang,LUAN Weina,HAN Jilei,et al.Main controlling factors on sandstone free gas accumulation in the Qinshui Basin[J].Natural Gas Geoscience,2015,26(10):1873-1882.
[20]赵明华,李治平,郭艳东,等.灰色关联分析在储层潜力区划分中的应用[J].油气地质与采收率,2009,16(3):15-17.ZHAO Minghua,LI Zhiping,GUO Yandong,et al.Application of grey relation analysis in reservoir potential region division[J].Petroleum Geology and Recovery Efficiency,2009,16(3):15-17.