巨厚层均质砂岩储集层渗流屏障特征及分布规律
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摘要
针对塔里木盆地塔中4油田CⅢ油藏储集层,以岩心、测井等资料为基础,对研究区泥质、钙质和钙泥质3类渗流屏障特征进行了表征,通过对不同类型渗流屏障的岩心观察、岩性物性分析、测井响应特征分析和形成机理研究,建立了储集层内部不同类型渗流屏障的划分标准。以平行渗流屏障模式为地质模式基础,结合生产动态资料,根据不同渗流屏障对储集层流体渗流的影响,将研究区井间渗流屏障分为完全遮挡型、部分遮挡型和完全不遮挡型3种,并明确了渗流屏障在垂向上和平面上的分布规律。垂向上,不同层段的渗流屏障对流体渗流影响不同,上交互亚段和下交互亚段上部渗流屏障对流体渗流影响最大,而平面上研究区西北部渗流屏障最为发育。充分认识储集层渗流屏障特征、分布规律及其对流体渗流的影响,对油田剩余油的挖潜和采收率的提高具有重要的地质意义。
Regarding the CⅢ reservoir in Tazhong-4 oilfield of Tarim basin and on the basis of core and logging data, 3 types of argillaceous, calcareous and argillaceous-calcareous seepage barriers are characterized. Based on the core observation, lithological and physical property analysis, logging response analysis and forming mechanism study of the seepage barriers, a classification standard is established for the different seepage barriers within reservoirs. Taking the parallel seepage barrier model as the basis of geological model and combining with the production performance, fully occluded, partially occluded and non occluded interwell seepage barriers are classified according to the influences of the barriers on reservoir fluid flowing in the study area, and the vertical and horizontal distribution laws of the barriers are verified. Vertically the seepage barriers of different intervals have different impacts on fluid flowing, and horizontally the seepage barriers are very developed in the northwest of the study area. Fully understanding the reservoir seepage barrier characteristics, distribution and impact on fluid flowing will provide an important geological basis for remaining oil potential tapping and oil recovery improvement.
Regarding the CⅢ reservoir in Tazhong-4 oilfield of Tarim basin and on the basis of core and logging data, 3 types of argillaceous, calcareous and argillaceous-calcareous seepage barriers are characterized. Based on the core observation, lithological and physical property analysis, logging response analysis and forming mechanism study of the seepage barriers, a classification standard is established for the different seepage barriers within reservoirs. Taking the parallel seepage barrier model as the basis of geological model and combining with the production performance, fully occluded, partially occluded and non occluded interwell seepage barriers are classified according to the influences of the barriers on reservoir fluid flowing in the study area, and the vertical and horizontal distribution laws of the barriers are verified. Vertically the seepage barriers of different intervals have different impacts on fluid flowing, and horizontally the seepage barriers are very developed in the northwest of the study area. Fully understanding the reservoir seepage barrier characteristics, distribution and impact on fluid flowing will provide an important geological basis for remaining oil potential tapping and oil recovery improvement.
引文
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[15]王梓媛,潘懋,师永民,等.塔里木盆地东河1油藏滨岸砂岩隔夹层识别及空间展布[J].石油学报,2015,36(8):966-975.WANG Ziyuan,PAN Mao,SHI Yongmin,et al. Interlayer identification and spatial distribution in onshore sandstone,Donghe 1 reservoir,Tarim basin[J]. Acta Petrolei Sinica,2015,36(8):966-975.
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[3]王旭影,姜在兴,岳大力,等.河控三角洲河口坝储层内部隔夹层分布样式研究[J].西南石油大学学报(自然科学版),2017,39(2):9-17.WANG Xuying,JIANG Zaixing,YUE Dali,et al. Patterns of barrierinterlayers in mouth bar of fluvial dominated delta reservoirs[J].Journal of Southwest Petroleum University(Science&Technology Edition),2017,39(2):9-17.
[4]马世忠,孙雨,范广娟,等.地下曲流河道单砂体内部薄夹层建筑结构研究方法[J].沉积学报,2008,26(4):632-638.MA Shizhong,SUN Yu,FAN Guangjuan,et al. The method for studying thin interbed architecture of burial meandering channel sandbody[J]. Acta Sedimentologica Sinica,2008,26(4):632-638.
[5]肖正录,陈世加,廖建波,等.河道构型单元及其对油藏的控制作用——以鄂尔多斯盆地华庆地区长8段储集层为例[J].新疆石油地质,2018,39(5):524-529.XIAO Zhenglu,CHEN Shijia,LIAO Jianbo,et al. Channel architecture element and its controls on hydrocarbon accumulation:a case study from Chang-8 member in Huaqing area,Ordos basin[J]. Xinjiang Petroleum Geology,2018,39(5):524-529.
[6]刘超,赵春明,廖新武,等.海上油田大井距条件下曲流河储层内部构型精细解剖及应用分析[J].中国海上油气,2014,26(1):58-64.LIU Chao,ZHAO Chunming,LIAO Xinwu,et al. A refined anatomy of the internal structure of meandering river reservoirs under large well spacing in offshore oilfields and its application[J]. China Offshore Oil and Gas,2014,26(1):58-64.
[7]孙天建,穆龙新,赵国良.砂质辫状河储集层隔夹层类型及其表征方法——以苏丹穆格莱特盆地Hegli油田为例[J].石油勘探与开发,2014,41(1):112-120.SUN Tianjian,MU Longxin,ZHAO Guoliang. Classification and characterization of barrier-intercalation in sandy braided river reservoirs:taking Hegli oilfield of Muglad basin in Sudan as an example[J]. Petroleum Exploration and Development,2014,41(1):112-120.
[8]王延章,林承焰,温长云,等.夹层分布模式及其对剩余油的控制作用[J].西南石油学院学报,2006,28(5):6-10.WANG Yanzhang,LIN Chengyan,WEN Changyun,et al. The distribution pattern of interlayer and its controlling functiong on remaining oil[J]. Journal of Southwest Petroleum Institute,2006,28(5):6-10.
[9]吴胜和,王仲林.陆相储层流动单元研究的新思路[J].沉积学报,1999,17(2):252-257.WU Shenghe,WANG Zhonglin. A new method of nonmarine reservoir flow unit study[J]. Acta Sedimentologica Sinica,1999,17(2):252-257.
[10]邹信波,罗东红,刘永杰,等.海陆过渡相块状砂岩油藏“内嵌”夹层对开发效果的影响及开发技术对策[J].中国海上油气,2010,22(5):309-313.ZOU Xinbo,LUO Donghong,LIU Yongjie,et al. Impacts of“embedded”beds within a massive sandstone oil reservoir of continental-oceanic transitional facies on its development effect and related countermeasures[J]. China Offshore Oil and Gas,2010,22(5):309-313.
[11]陈欢庆,胡永乐,闫林,等.储层流动单元研究进展[J].地球学报,2010,31(6):875-884.CHEN Huanqing,HU Yongle,YAN Lin,et al. Advances in the study of reservoir flow unit[J]. Acta Geoscientica Sinica,2010,31(6):875-884.
[12]尹楠鑫,李存贵,李中超,等.塔中16含砾砂岩段隔夹层对油水分布的影响[J].西南石油大学学报(自然科学版),2016,38(6):25-34.YIN Nanxin,LI Cungui,LI Zhongchao,et al. The impact of the interlayer of No. 16 pebbled sandstone member in Tarim on the distribution of oil and water[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2016,38(6):25-34.
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[15]王梓媛,潘懋,师永民,等.塔里木盆地东河1油藏滨岸砂岩隔夹层识别及空间展布[J].石油学报,2015,36(8):966-975.WANG Ziyuan,PAN Mao,SHI Yongmin,et al. Interlayer identification and spatial distribution in onshore sandstone,Donghe 1 reservoir,Tarim basin[J]. Acta Petrolei Sinica,2015,36(8):966-975.