鄂尔多斯盆地乌审旗——横山地区下奥陶统马五_(1+2)亚段储层综合评价
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摘要
鄂尔多斯盆地乌审旗—横山地区下奥陶统马五_(1+2)亚段为海相碳酸盐地层,是该区的主要产气层之一,其储层的形成和发育特征受到古地貌和岩溶作用、沉积环境和成岩改造的综合作用,储层分布连片性差,具有较强的非均质性,详细评价储层难度大,早期在低孔隙度、低渗透率储层研究中,仅以静态参数为依据作为划分储层类别的依据和标准,研究程度不够细致、深入。为了弄清乌审旗—横山地区下奥陶统马家沟组马五_(1+2)亚段储层展布特征和优质储层发育的主控因素,从储层的岩石学特征、孔渗条件、微观孔隙类型等方面进行描述表征,利用压汞、相渗和核磁共振等手段对储层孔隙结构特征进行研究,结合储层测试产能,提出了该区储层划分标准,并开展了储层综合评价。在此基础上,结合沉积、成岩、古地貌和岩溶等作用,分析影响储层发育的主要影响因素,明确了各类储层平面分布位置和展布规律,为该区气田开发有利建产区优选提供了依据。
In the Uxin Banner-Hengshan area of the Ordos Basin, the Lower Ordovician Ma5_(1+2) sub-member is a marine carbonate formation and it is one of the main gas pay zones. The formation and development characteristics of reservoirs are dominated jointly by palaeogeomorphology and karstification, depositional environment and diagenetic reconstruction, and they are poorly connected with strong heterogeneity, so it is difficult to carry out detailed reservoir evaluation. In the early stage of low-porosity and low-permeability reservoir study, static parameters were the only basis and criteria of reservoir classification, so the research was not detailed or thorough enough. In this paper, the Ma5_(1+2) reservoirs of Lower Ordovician Majiagou Formation in the Uxin Banner-Hengshan area were characterized from the aspects of petrologic characteristics, porosity-permeability conditions and micro-pore types to clarify their distribution characteristics and the main factors controlling the development of high quality reservoirs. The structural characteristics of pores in reservoirs were analyzed by means of mercury injection, relative permeability and nuclear magnetic resonance(NMR). Then, based on reservoir productivity test, the reservoir division criterion of this area was proposed and the reservoirs were evaluated comprehensively. On this basis, combined with sedimentation, diagenesis, palaeogeomorphology and karstification, the main factors affecting reservoir development were analyzed, and plane distribution location and distribution laws of various reservoirs were figured out. It provides the basis for selecting the favorable zones of productivity construction in this area.
In the Uxin Banner-Hengshan area of the Ordos Basin, the Lower Ordovician Ma5_(1+2) sub-member is a marine carbonate formation and it is one of the main gas pay zones. The formation and development characteristics of reservoirs are dominated jointly by palaeogeomorphology and karstification, depositional environment and diagenetic reconstruction, and they are poorly connected with strong heterogeneity, so it is difficult to carry out detailed reservoir evaluation. In the early stage of low-porosity and low-permeability reservoir study, static parameters were the only basis and criteria of reservoir classification, so the research was not detailed or thorough enough. In this paper, the Ma5_(1+2) reservoirs of Lower Ordovician Majiagou Formation in the Uxin Banner-Hengshan area were characterized from the aspects of petrologic characteristics, porosity-permeability conditions and micro-pore types to clarify their distribution characteristics and the main factors controlling the development of high quality reservoirs. The structural characteristics of pores in reservoirs were analyzed by means of mercury injection, relative permeability and nuclear magnetic resonance(NMR). Then, based on reservoir productivity test, the reservoir division criterion of this area was proposed and the reservoirs were evaluated comprehensively. On this basis, combined with sedimentation, diagenesis, palaeogeomorphology and karstification, the main factors affecting reservoir development were analyzed, and plane distribution location and distribution laws of various reservoirs were figured out. It provides the basis for selecting the favorable zones of productivity construction in this area.
引文
[1]蔡开平,樊世海,张本健,杨华,周玲.川西南部地区沙溪庙组沉积成岩特征与储层关系研究[J].天然气勘探与开发,2004,27(3):11-17.Cai Kaiping,Fan Xihai,Zhang Benjian,Yang Hua&Zhou Ling.Research on sedimentation diagenetic feature and reservoir relationship of saximiao formation in south district of west sichuan[J].Natural Gas Exploration&Development,2004,27(3):11-17.
[2]靳秀菊,姜贻伟,刘志远,毕建霞,万晓伟.礁滩相碳酸盐岩气藏气层下限标准研究[J].断块油气田,2010,17(5):571-574.Jin Xiuju,Jiang Yiwei,Liu Zhiyuan,Bi Jianxia&Wan Xiaowei.Minimum standard of gas pay identification for reef flat carbonate rock reservoir[J].Fault-Block Oil&Gas Field,2010,17(5):571-574.
[3]罗顺社,霍勇,罗军梅,吕奇奇,尚飞,淡卫东,等.靖边潜台南部中奥陶统马五1~4亚段沉积演化特征研究[J].矿物岩石地球化学通报,2011,30(4):407-414.Luo Shunshe,Huo Yong,Luo Junmei,LüQiqi,Shang Fei,Dan Weidong,et al.Sedimentary evolution of middle Ordovician Ma51~4 submembers in the Southern Jingbian tableland[J].Bulletin of Mineralogy,Petrology and Geochemistry,2011,30(4):407-414.
[4]于雷,陈建文,金绍臣,陈振波,郭小燕,车飞.鄂尔多斯盆地彭阳地区延安组、长3油层组储层特征及评价[J].岩性油气藏,2012,24(6):49-53.Yu Lei,Chen Jianwen,Jin Shaochen,Chen Zhenbo,Guo Xiaoyan&Che Fei.Reservoir characteristics and evaluation of Yan'an Formation and Chang 3 oil reservoir set in Pengyang area,Ordos Basin[J].Lithologic Reserviors,2012,24(6):49-53.
[5]李安仁,刘文均,张锦泉,耿爱琴,郝蜀民.鄂尔多斯盆地早奥陶世沉积特征及其演化[J].成都地质学院学报,1993,20(1):17-26.Li Anren,Liu Wenjun,Zhang Jinquan,Geng Aiqin&Hao Shumin.Sedimentary characteristics and evolution of early ordovician in ordos basin[J].Journal of Chengdu College of Geology,1993,20(1):17-26.
[6]丁熊,谭秀成,罗冰,黄勇斌,范玲.基于灰色模糊理论的多参数碳酸盐岩储层评价[J].西南石油大学学报(自然科学版),2008,30(5):88-92.Ding Xiong,Tan Xiucheng,Luo Bing,Huang Yongbin&Fan Ling.Multi-parameter Carbonate rock reservoirs Evaluation Based on Grey Fuzzy Theory[J].Journal of southwest Petroleum University(Science&Technology Edition),2008,30(5):88-92.
[7]翟永红,郭建华,刘生国.塔中地区石炭系碳酸盐岩成岩作用与储层评价[J].江汉石油学院学报,1995,17(3):13-18.Zhai Yonghong,Guo Jianhua&Liu Shengguo.Diagenesis and reservoir evaluation of carboniferous carbonate reservoirs in Tazhong Area[J].Journal of Jianghan Petroleum Institute,1995,17(3):13-18.
[8]罗智,祁兴中,张贵斌,刘兴礼,张伟,雷蕾.碳酸盐岩洞穴储层有效性评价方法研究[J].石油天然气学报,2010,32(4):92-96.Luo Zhi,Qi Xinzhong,Zhang Guibing,Liu Xingli,Zhang Wei&Lei Lei.The method for effective evaluation of carbonate cave reservoirs[J].Journal of Oil and Gas Technology,2010,32(4):92-96.
[9]周进高,邓红婴.鄂尔多斯盆地奥陶系碳酸盐岩储层非均质性评价[J].海相油气地质,2003,8(S1):68-73.Zhou Jin'gao&Deng Hongying.Appraisement of inhomogenous ordovician carbonate reservoirs in ordos basin[J].Marine Origin Petroleum Geology,2003,8(S1):68-73.
[10]陈贵科,张帆,冯雪龙,高伟,利霞,郭隽菁.双家坝构造碳酸盐岩储层参数评价[J].西南石油学院学报,2005,27(6):12-14.Chen Kegui,Zhang Fan,Feng Xuelong,Gao Wei,Li Xia&Guo Junjing.Carbonate reservoir parameter estimation in shuangjiaba structure[J].Journal of Southwest Petroleum Institute,2005,27(6):12-14.
[11]罗婷婷,周立发,刘志武.核磁共振技术在渭河盆地奥陶系储层评价中的应用[J].特种油气藏,2011,18(2):37-40.Luo Tingting,Zhou Lifa&Liu Zhiwu.Application of NMR technology in Ordovician reservoir evaluation in the Weihe Basin[J].Special Oil&Gas Reservoirs,2011,18(2):37-40.
[12]王小敏,樊太亮.碳酸盐岩礁滩相储层分类[J].中南大学学报(自然科学版),2012,43(5):1837-1844.Wang Xiaomin&Fan Tailiang.Classification of carbonate reefshoal reservoir rocks[J].Journal of Central South University(Science and Technology),2012,43(5):1837-1844.
[13]王作乾,何顺利.靖边下古生界气藏马五段碳酸盐岩储层综合评价[J].石油天然气学报,2009,31(4):180-182.Wang Zuoqian&He Shunli.Integrated evaluation of carbonate reservoir for om5 of lower paleozoic gas reservoir in Jingbian Area[J].Journal of Oil and Gas Technology,2009,31(4):180-182.
[14]姜在兴.沉积学[M].北京:石油工业出版社,2003:181-236.Jiang Zaixing.Sedimentology[M].Beijing:Petroleum Industry Press,2003:181-236.
[15]杨光,汪华,沈浩,杨雨然,贾松,陈文,等.四川盆地中二叠统储层特征与勘探方向[J].天然气工业,2015,35(7):10-16.Yang Guang,Wang Hua,Shen Hao,Yang Yuran,Jia Song,Chen Wen,et al.Characteristics and exploration prospects of Middle Permian reservoirs in the Sichuan Basin[J].Natural Gas Industry,2015,35(7):10-16.
[16]刘新社,蒋有录,侯云东,刘景东,文彩霞,朱荣伟,等.鄂尔多斯盆地靖西地区奥陶系中组合天然气成因与成藏主控因素[J].天然气工业,2016,36(4):16-26.Liu Xinshe,Jiang Youlu,Hou Yundong,Liu Jingdong,Wen Caixia,Zhu Rongwei,et al.Origins of natural gas and the main controlling factors of gas accumulation in the Middle Ordovician assemblages in the Jingxi area,Ordos Basin[J].Natural Gas Industry,2016,36(4):16-26.
[2]靳秀菊,姜贻伟,刘志远,毕建霞,万晓伟.礁滩相碳酸盐岩气藏气层下限标准研究[J].断块油气田,2010,17(5):571-574.Jin Xiuju,Jiang Yiwei,Liu Zhiyuan,Bi Jianxia&Wan Xiaowei.Minimum standard of gas pay identification for reef flat carbonate rock reservoir[J].Fault-Block Oil&Gas Field,2010,17(5):571-574.
[3]罗顺社,霍勇,罗军梅,吕奇奇,尚飞,淡卫东,等.靖边潜台南部中奥陶统马五1~4亚段沉积演化特征研究[J].矿物岩石地球化学通报,2011,30(4):407-414.Luo Shunshe,Huo Yong,Luo Junmei,LüQiqi,Shang Fei,Dan Weidong,et al.Sedimentary evolution of middle Ordovician Ma51~4 submembers in the Southern Jingbian tableland[J].Bulletin of Mineralogy,Petrology and Geochemistry,2011,30(4):407-414.
[4]于雷,陈建文,金绍臣,陈振波,郭小燕,车飞.鄂尔多斯盆地彭阳地区延安组、长3油层组储层特征及评价[J].岩性油气藏,2012,24(6):49-53.Yu Lei,Chen Jianwen,Jin Shaochen,Chen Zhenbo,Guo Xiaoyan&Che Fei.Reservoir characteristics and evaluation of Yan'an Formation and Chang 3 oil reservoir set in Pengyang area,Ordos Basin[J].Lithologic Reserviors,2012,24(6):49-53.
[5]李安仁,刘文均,张锦泉,耿爱琴,郝蜀民.鄂尔多斯盆地早奥陶世沉积特征及其演化[J].成都地质学院学报,1993,20(1):17-26.Li Anren,Liu Wenjun,Zhang Jinquan,Geng Aiqin&Hao Shumin.Sedimentary characteristics and evolution of early ordovician in ordos basin[J].Journal of Chengdu College of Geology,1993,20(1):17-26.
[6]丁熊,谭秀成,罗冰,黄勇斌,范玲.基于灰色模糊理论的多参数碳酸盐岩储层评价[J].西南石油大学学报(自然科学版),2008,30(5):88-92.Ding Xiong,Tan Xiucheng,Luo Bing,Huang Yongbin&Fan Ling.Multi-parameter Carbonate rock reservoirs Evaluation Based on Grey Fuzzy Theory[J].Journal of southwest Petroleum University(Science&Technology Edition),2008,30(5):88-92.
[7]翟永红,郭建华,刘生国.塔中地区石炭系碳酸盐岩成岩作用与储层评价[J].江汉石油学院学报,1995,17(3):13-18.Zhai Yonghong,Guo Jianhua&Liu Shengguo.Diagenesis and reservoir evaluation of carboniferous carbonate reservoirs in Tazhong Area[J].Journal of Jianghan Petroleum Institute,1995,17(3):13-18.
[8]罗智,祁兴中,张贵斌,刘兴礼,张伟,雷蕾.碳酸盐岩洞穴储层有效性评价方法研究[J].石油天然气学报,2010,32(4):92-96.Luo Zhi,Qi Xinzhong,Zhang Guibing,Liu Xingli,Zhang Wei&Lei Lei.The method for effective evaluation of carbonate cave reservoirs[J].Journal of Oil and Gas Technology,2010,32(4):92-96.
[9]周进高,邓红婴.鄂尔多斯盆地奥陶系碳酸盐岩储层非均质性评价[J].海相油气地质,2003,8(S1):68-73.Zhou Jin'gao&Deng Hongying.Appraisement of inhomogenous ordovician carbonate reservoirs in ordos basin[J].Marine Origin Petroleum Geology,2003,8(S1):68-73.
[10]陈贵科,张帆,冯雪龙,高伟,利霞,郭隽菁.双家坝构造碳酸盐岩储层参数评价[J].西南石油学院学报,2005,27(6):12-14.Chen Kegui,Zhang Fan,Feng Xuelong,Gao Wei,Li Xia&Guo Junjing.Carbonate reservoir parameter estimation in shuangjiaba structure[J].Journal of Southwest Petroleum Institute,2005,27(6):12-14.
[11]罗婷婷,周立发,刘志武.核磁共振技术在渭河盆地奥陶系储层评价中的应用[J].特种油气藏,2011,18(2):37-40.Luo Tingting,Zhou Lifa&Liu Zhiwu.Application of NMR technology in Ordovician reservoir evaluation in the Weihe Basin[J].Special Oil&Gas Reservoirs,2011,18(2):37-40.
[12]王小敏,樊太亮.碳酸盐岩礁滩相储层分类[J].中南大学学报(自然科学版),2012,43(5):1837-1844.Wang Xiaomin&Fan Tailiang.Classification of carbonate reefshoal reservoir rocks[J].Journal of Central South University(Science and Technology),2012,43(5):1837-1844.
[13]王作乾,何顺利.靖边下古生界气藏马五段碳酸盐岩储层综合评价[J].石油天然气学报,2009,31(4):180-182.Wang Zuoqian&He Shunli.Integrated evaluation of carbonate reservoir for om5 of lower paleozoic gas reservoir in Jingbian Area[J].Journal of Oil and Gas Technology,2009,31(4):180-182.
[14]姜在兴.沉积学[M].北京:石油工业出版社,2003:181-236.Jiang Zaixing.Sedimentology[M].Beijing:Petroleum Industry Press,2003:181-236.
[15]杨光,汪华,沈浩,杨雨然,贾松,陈文,等.四川盆地中二叠统储层特征与勘探方向[J].天然气工业,2015,35(7):10-16.Yang Guang,Wang Hua,Shen Hao,Yang Yuran,Jia Song,Chen Wen,et al.Characteristics and exploration prospects of Middle Permian reservoirs in the Sichuan Basin[J].Natural Gas Industry,2015,35(7):10-16.
[16]刘新社,蒋有录,侯云东,刘景东,文彩霞,朱荣伟,等.鄂尔多斯盆地靖西地区奥陶系中组合天然气成因与成藏主控因素[J].天然气工业,2016,36(4):16-26.Liu Xinshe,Jiang Youlu,Hou Yundong,Liu Jingdong,Wen Caixia,Zhu Rongwei,et al.Origins of natural gas and the main controlling factors of gas accumulation in the Middle Ordovician assemblages in the Jingxi area,Ordos Basin[J].Natural Gas Industry,2016,36(4):16-26.