徐深气田盖层封气有效性研究
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摘要
利用钻井、地震和分析测试资料,对徐深气田盖层发育及分布、封气能力的有效性和封气时间的有效性进行了研究,得到徐深气田天然气盖层主要为登二段发育的泥岩和营一段顶部发育的火山岩,前者整个断陷分布,是断陷南部营四段火山角砾岩和断陷北部营三段火山岩储集天然气的盖层,后者仅分布在断陷南部,是营一段火山岩储集天然气的盖层。徐深气田中12个气藏盖层排替压力均大于储层排替压力和气藏剩余压力之和,封气能力的有效性好,有利于天然气聚集与保存。登二段和营一段顶部盖层封气性形成时期主要分别为泉一、二段沉积时期和登四段沉积时期,均早于沙河子组煤系源岩的大量排气期(青山口组沉积时期),封气时间的有效性好,也有利于天然气的大规模富集成藏。
Through drilling and seismic data,development and distribution of caprock of Xushen gas field was studied.It was considered that caprock of Xushen gas field is mainly mudstone caprock of K1d2 and volcanic caprock on top of K1yc1,and the former which distributes in the whole of depression is caprock of gas reserved in K1yc4 volcanic breccia in the south of depression and caprock of gas reserved in K1yc3 volcanic in the north of depression,the later which distributes in the south of depression is caprock of gas reserved in volcanic.Through test and logging data,displacement pressure of caprock and reservoir and excessive pressure of gas reservoirs were studied.It was considered that displacement pressure of caprock in 12 gas reservoirs is larger than the sum of displacement pressure of gas reservoirs.Their seal gas ability effectiveness is good,and it is favorable for gas to accumulate and preserve.Through the study of evolution of seal gas ability of caprock and relation between formation period of seal gas ability and massive expulsion gas period of seal source rock,it was considered that formation period of seal gas of K1d2 caprock and K1yc1 caprock are sedimentary period of K1q1,2 and K1d4 and they are earlier than massive expulsion gas period of gas source rock(Sedimentary period of K1sh).Their seal gas time effectiveness is good.It is favorable for large-scaled gas accumulation.
Through drilling and seismic data,development and distribution of caprock of Xushen gas field was studied.It was considered that caprock of Xushen gas field is mainly mudstone caprock of K1d2 and volcanic caprock on top of K1yc1,and the former which distributes in the whole of depression is caprock of gas reserved in K1yc4 volcanic breccia in the south of depression and caprock of gas reserved in K1yc3 volcanic in the north of depression,the later which distributes in the south of depression is caprock of gas reserved in volcanic.Through test and logging data,displacement pressure of caprock and reservoir and excessive pressure of gas reservoirs were studied.It was considered that displacement pressure of caprock in 12 gas reservoirs is larger than the sum of displacement pressure of gas reservoirs.Their seal gas ability effectiveness is good,and it is favorable for gas to accumulate and preserve.Through the study of evolution of seal gas ability of caprock and relation between formation period of seal gas ability and massive expulsion gas period of seal source rock,it was considered that formation period of seal gas of K1d2 caprock and K1yc1 caprock are sedimentary period of K1q1,2 and K1d4 and they are earlier than massive expulsion gas period of gas source rock(Sedimentary period of K1sh).Their seal gas time effectiveness is good.It is favorable for large-scaled gas accumulation.
引文
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2胡国艺,李谨,崔会英,等.塔东地区天然气生成地质模式及其封盖条件评价[J].中国科学D辑:地球科学,2008,38(S2):87-96[Hu Guoyi,Li Jin,Cui Huiying,et al.Geological model of naturalgas generation and evaluation of caprock conditions in the eastern ofTalimu Depression[J].Science in China(Series D):Earth Sciences,2008,38(S2):87-96]
3吕延防,付广,高大岭,等.油气藏封盖研究[M].北京:石油工业出版社,1996:4-30[LüYanfang,Fu Guang,Gao Daling,et al.Re-search on Seal of Oil-Gas Reservoirs[M].Beijing:Petroleum IndustryPress,1996:4-30]
4郝石生,陈章明,高耀斌,等.天然气藏的形成与保存[M].北京:石油工业出版社,1995:91-110[Hao Shisheng,Chen Zhangming,Gao Yaobin,et al.Formation and Preservation of Gas Reservoirs[M].Beijing:Petroleum Industry Press,1995:91-110]
5郝石生,黄志龙.天然气盖层研究与评价[J].沉积学报,1991,9(4):20-26[Hao Shisheng,Huang Zhilong.Research and evaluation ofgas cap rock[J].Acta Sedimentologica Sinica,1991,9(4):20-26]
6吕延防,付广,于丹.中国大中型气田盖层封盖能力综合评价及其对成藏的贡献[J].石油与天然气地质.2005,26(6):742-745[LüYanfang,Fu Guang,Yu Dan.Comprehensive evaluation of sealing a-bility of cap rock in China's large and medium gas fields and their con-tribution to gas accumulation[J].Oil&Gas Geology,2005,26(6):742-745.]
7付广,刘江涛.我国大中型气田形成的封盖保存条件[J].石油勘探与开发,2006,33(6):662-666[Fu Guang,Liu Jiangtao.Sealingand preservation conditions for large and medium gas fields of China[J].Petroleum Exploration&Development,2006,33(6):662-666]
8戴金星,邹才能,陶士振,等.中国大气田形成条件和主控因素[J].天然气地球科学,2007,18(4):473-484[Dai Jinxing,ZouCaineng,Tao Shizhen,et al.Formation conditions and main control-ling factors of large gas fields in China[J].Natural Gas Geoscience,2007.18(4):473-484]
9刘纯刚,郭淑梅,徐艳姝,等.泥岩盖层对各种相态天然气封闭性演化阶段划分及意义[J].大庆石油地质与开发,2007,26(3):13-17[Liu Chungang,Guo Shumei,Xu Yanshu,et al.Division of seal e-volution stages of shale caprocks to gas in each phase and its researchsignificance[J].Petroleum Geology&Oilfield Development inDaqing,2007,26(3):13-17]
10刘江涛,李杰,杨景勇.准噶尔南缘前陆冲断带盖层封闭能力及其对油气的控制作用[J].大庆石油学院学报,2009,33(1):12-16[Liu Jiangtao,Li Jie,Yang Jingyong.Seal capacity of caprock andits control on hydrocarbon in the foreland thrust belt of Junggar basin[J].Journal of Daqing Petroleum Institute,2009,33(1):12-16.]
11刘安英,包丽.徐家围子断陷断裂对盖层及天然气分布的影响[J].天然气工业,2009,29(8):8-11[Liu Anying,Bao Li.The im-pacts of faults on seal and gas distribution in Xujiaweizi fault depres-sion[J].Natural Gas Industry,2009,29(8):8-11]
12王雅春,李刚,杨宏松,等.徐家围子断陷储盖组合及对天然气富集的控制作用[J].大庆石油学院学报,2009,33(4):5-8[WangYachun,Li Gang,Yang Hongsong,et al.Reservoir seal assemblagein Xujiiaweizi fault depression and its control effect on natural gas en-richment[J].Journal Daqing Petroleum Institute,2009,33(4):5-8]
13付广,王有功.火山岩天然气成藏要素时空匹配及对气藏的控制作用:以徐家围子地区深层为例[J].地球科学-中国地质大学学报,2008,33(3):342-348[Fu Guang,Wang Yougong.Time andspace matching relation among accumulation essential factors of gasreservoirs in volcanic rock and its controlling to gas accumulation:acase study of deep strata of Xujiaweizi region[J].Earth Science-Jour-nal of China University of Geosciences,2008,33(3):342-348.]
2胡国艺,李谨,崔会英,等.塔东地区天然气生成地质模式及其封盖条件评价[J].中国科学D辑:地球科学,2008,38(S2):87-96[Hu Guoyi,Li Jin,Cui Huiying,et al.Geological model of naturalgas generation and evaluation of caprock conditions in the eastern ofTalimu Depression[J].Science in China(Series D):Earth Sciences,2008,38(S2):87-96]
3吕延防,付广,高大岭,等.油气藏封盖研究[M].北京:石油工业出版社,1996:4-30[LüYanfang,Fu Guang,Gao Daling,et al.Re-search on Seal of Oil-Gas Reservoirs[M].Beijing:Petroleum IndustryPress,1996:4-30]
4郝石生,陈章明,高耀斌,等.天然气藏的形成与保存[M].北京:石油工业出版社,1995:91-110[Hao Shisheng,Chen Zhangming,Gao Yaobin,et al.Formation and Preservation of Gas Reservoirs[M].Beijing:Petroleum Industry Press,1995:91-110]
5郝石生,黄志龙.天然气盖层研究与评价[J].沉积学报,1991,9(4):20-26[Hao Shisheng,Huang Zhilong.Research and evaluation ofgas cap rock[J].Acta Sedimentologica Sinica,1991,9(4):20-26]
6吕延防,付广,于丹.中国大中型气田盖层封盖能力综合评价及其对成藏的贡献[J].石油与天然气地质.2005,26(6):742-745[LüYanfang,Fu Guang,Yu Dan.Comprehensive evaluation of sealing a-bility of cap rock in China's large and medium gas fields and their con-tribution to gas accumulation[J].Oil&Gas Geology,2005,26(6):742-745.]
7付广,刘江涛.我国大中型气田形成的封盖保存条件[J].石油勘探与开发,2006,33(6):662-666[Fu Guang,Liu Jiangtao.Sealingand preservation conditions for large and medium gas fields of China[J].Petroleum Exploration&Development,2006,33(6):662-666]
8戴金星,邹才能,陶士振,等.中国大气田形成条件和主控因素[J].天然气地球科学,2007,18(4):473-484[Dai Jinxing,ZouCaineng,Tao Shizhen,et al.Formation conditions and main control-ling factors of large gas fields in China[J].Natural Gas Geoscience,2007.18(4):473-484]
9刘纯刚,郭淑梅,徐艳姝,等.泥岩盖层对各种相态天然气封闭性演化阶段划分及意义[J].大庆石油地质与开发,2007,26(3):13-17[Liu Chungang,Guo Shumei,Xu Yanshu,et al.Division of seal e-volution stages of shale caprocks to gas in each phase and its researchsignificance[J].Petroleum Geology&Oilfield Development inDaqing,2007,26(3):13-17]
10刘江涛,李杰,杨景勇.准噶尔南缘前陆冲断带盖层封闭能力及其对油气的控制作用[J].大庆石油学院学报,2009,33(1):12-16[Liu Jiangtao,Li Jie,Yang Jingyong.Seal capacity of caprock andits control on hydrocarbon in the foreland thrust belt of Junggar basin[J].Journal of Daqing Petroleum Institute,2009,33(1):12-16.]
11刘安英,包丽.徐家围子断陷断裂对盖层及天然气分布的影响[J].天然气工业,2009,29(8):8-11[Liu Anying,Bao Li.The im-pacts of faults on seal and gas distribution in Xujiaweizi fault depres-sion[J].Natural Gas Industry,2009,29(8):8-11]
12王雅春,李刚,杨宏松,等.徐家围子断陷储盖组合及对天然气富集的控制作用[J].大庆石油学院学报,2009,33(4):5-8[WangYachun,Li Gang,Yang Hongsong,et al.Reservoir seal assemblagein Xujiiaweizi fault depression and its control effect on natural gas en-richment[J].Journal Daqing Petroleum Institute,2009,33(4):5-8]
13付广,王有功.火山岩天然气成藏要素时空匹配及对气藏的控制作用:以徐家围子地区深层为例[J].地球科学-中国地质大学学报,2008,33(3):342-348[Fu Guang,Wang Yougong.Time andspace matching relation among accumulation essential factors of gasreservoirs in volcanic rock and its controlling to gas accumulation:acase study of deep strata of Xujiaweizi region[J].Earth Science-Jour-nal of China University of Geosciences,2008,33(3):342-348.]
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