大型致密砂岩气田气水分布规律及控制因素——以鄂尔多斯盆地苏里格气田西区为例
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摘要
以储集层地质特征为基础,分析苏里格气田西区地层水的化学特征和赋存状态,明确研究区气水分布规律及控制因素。苏里格气田西区含水层大面积广泛分布,气层发育差且分布局限,纵向上气、水层呈孤立状交叉分布,储集单元内部气水分异不明显,没有统一的气水界面,总体下石盒子组盒8下段和山西组山1段好于盒8上段。气水分布主要受生烃强度、储集层距烃源岩的距离、砂泥岩的配置关系及复合砂体内部物性差异等因素的控制,其中生烃强度控制了气水分布的宏观格局,随着生烃强度由高到低,由良好的天然气聚集逐渐向气水伴生气藏变化;储集层距烃源岩越近,气层相对越发育,反之则气水同层和含气水层越发育;砂泥岩的配置关系和复合砂体内部物性差异主要控制天然气的局部充注、聚集成藏,由此归纳出5种气水分布模式:纯气型、巨厚储集层气水混存型、上水下气型、上气下水型和上下水夹气型。
The chemical characteristics and occurrence state of formation water in western Sulige gas field were analyzed based on geological features of reservoirs,the gas and water distribution regularity and the main controlling factors were determined.Aquifer zones are widely distributed in the whole Western Sulige gas field,gas zones developed poorly and distributed limitedly.Vertically,gas and water zones are of poor continuity and distributed in an isolated and staggered pattern.Inside the gas reservoir,there is not a uniform gas and water interface because of the hard differentiation between gas and water.On the whole,the lower segment of H8 Member in Shihezi Formation and S1 Member in Shanxi Formation are both better than the upper segment of H8 Member.Gas and water distribution of Western Sulige gas field is mainly controlled by gas-generating intensity,the distances between reservoirs and hydrocarbon source rocks,configuration relationship of sand shale and physical property differences inside sand body complex.Among them,gas-generating intensity mainly controls the macro pattern of gas and water distribution,with the decrease of gas-generating intensity,good gas accumulation gradually changes to be water associated gas reservoir.The closer the distance between reservoirs and hydrocarbon source rocks,the more developed the gas zones,on the contrary,the gas-bearing water zone and coexisting gas and water zone are more developed.Sand shale configuration relationship and physical property differences inside sand body complex mainly control the local gas filling and accumulation.Five types of gas and water distribution patterns are summarized:pure gas,thick reservoir with mixed gas and water,water above the gas,gas above the water,and gas sandwiched between water.
The chemical characteristics and occurrence state of formation water in western Sulige gas field were analyzed based on geological features of reservoirs,the gas and water distribution regularity and the main controlling factors were determined.Aquifer zones are widely distributed in the whole Western Sulige gas field,gas zones developed poorly and distributed limitedly.Vertically,gas and water zones are of poor continuity and distributed in an isolated and staggered pattern.Inside the gas reservoir,there is not a uniform gas and water interface because of the hard differentiation between gas and water.On the whole,the lower segment of H8 Member in Shihezi Formation and S1 Member in Shanxi Formation are both better than the upper segment of H8 Member.Gas and water distribution of Western Sulige gas field is mainly controlled by gas-generating intensity,the distances between reservoirs and hydrocarbon source rocks,configuration relationship of sand shale and physical property differences inside sand body complex.Among them,gas-generating intensity mainly controls the macro pattern of gas and water distribution,with the decrease of gas-generating intensity,good gas accumulation gradually changes to be water associated gas reservoir.The closer the distance between reservoirs and hydrocarbon source rocks,the more developed the gas zones,on the contrary,the gas-bearing water zone and coexisting gas and water zone are more developed.Sand shale configuration relationship and physical property differences inside sand body complex mainly control the local gas filling and accumulation.Five types of gas and water distribution patterns are summarized:pure gas,thick reservoir with mixed gas and water,water above the gas,gas above the water,and gas sandwiched between water.
引文
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[2]马新华,贾爱林,谭健,等.中国致密砂岩气开发工程技术与实践[J].石油勘探与开发,2012,39(5):572-579.MA Xinhua,JIA Ailin,TAN Jian,et al.Tight sand gas development technologies and practices in China[J].Petroleum Exploration and Development,2012,39(5):572-579.
[3]何东博,贾爱林,冀光,等.苏里格大型致密砂岩气田开发井型井网技术[J].石油勘探与开发,2013,40(1):79-89.HE Dongbo,JIA Ailin,JI Guang,et al.Well type and pattern optimization technology for large scale tight sand gas,Sulige gas field[J].Petroleum Exploration and Development,2013,40(1):79-89.
[4]方建龙,孟德伟,何东博,等.鄂尔多斯盆地苏里格气田西区气水层识别及产水井排查[J].天然气地球科学,2015,26(12):2343-2351.FANG Jianlong,MENG Dewei,HE Dongbo,et al.Gas and water formation recognition and water producing well investigation in the western Sulige Gas Field,Ordos Basin[J].Natural Gas Geoscience,2015,26(12):2343-2351.
[5]窦伟坦,刘新社,王涛.鄂尔多斯盆地苏里格气田地层水成因及气水分布规律[J].石油学报,2010,31(5):767-773.DOU Weitan,LIU Xinshe,WANG Tao.The origin of formation water and the regularity of gas and water distribution for the Sulige gas field,Ordos Basin[J].Acta Petrolei Sinica,2010,31(5):767-773.
[6]刘济民.油田水文地质勘探中水化学及其特性指标的综合应用[J].石油勘探与开发,1982,9(6):49-55.LIU Jimin.The characteristics of underground water chemistry and its application in oilfield hydrology exploration[J].Petroleum Exploration and Development,1982,9(6):49-55.
[7]刘崇喜.我国陆相盆地油田水文地球化学特征[J].地球化学,1982,11(2):190-196.LIU Chongxi.Hydrogeochemical characteristics of non-marine oil-field basins in China[J].Geochimica,1982,11(2):190-196.
[8]李伟,刘济民,陈晓红,等.吐鲁番坳陷油田水地化特征及其石油地质意义[J].石油勘探与开发,1994,21(5):12-18.LI Wei,LIU Jimin,CHEN Xiaohong,et al.Characteristics of oil field water in TURUPAN depression and its petroleum geological significance[J].Petroleum Exploration and Development,1994,21(5):12-18.
[9]王泽明,鲁保菊,段传丽,等.苏里格气田苏20区块气水分布规律[J].天然气工业,2010,30(12):37-40.WANG Zeming,LU Baoju,DUAN Chuanli,et al.Gas-water distribution pattern in Block 20 of the Sulige Gas Field[J].Natural Gas Industry,2010,30(12):37-40.
[10]付金华,魏新善,任军峰.伊陕斜坡上古生界大面积岩性气藏分布与成因[J].石油勘探与开发,2008,35(6):664-667.FU Jinhua,WEI Xinshan,REN Junfeng.Distribution and genesis of large-scale Upper Paleozoic gas reservoirs on Yi-Shaan Slope[J].Petroleum Exploration and Development,2008,35(6):664-667.
[11]曹锋,邹才能,付金华,等.鄂尔多斯盆地苏里格大气区天然气近源运聚的证据剖析[J].岩石学报,2011,27(3):857-866.CAO Feng,ZOU Caineng,FU Jinhua,et al.Evidence analysis of natural gas near-source migration-accumulation model in the Sulige large gas province,Ordos basin,China[J].Acta Petrologica Sinica,2011,27(3):857-866.
[12]刘新社,席胜利,付金华,等.鄂尔多斯盆地上古生界天然气生成[J].天然气工业,2000,20(6):19-23.LIU Xinshe,XI Shengli,FU Jinhua,et al.Natural gas generation in the Upper Paleozoic in E’erduosi Basin[J].Natural Gas Industry,2000,20(6):19-23.
[13]闵琪,付金华,席胜利,等.鄂尔多斯盆地上古生界天然气运移聚集特征[J].石油勘探与开发,2000,27(4):26-29.MIN Qi,FU Jinhua,XI Shengli,et al.Characteristics of natural gas migration and accumulation in the Upper Paleozoic of Ordos Basin[J].Petroleum Exploration and Development,2000,27(4):26-29.
[14]杨华,魏新善.鄂尔多斯盆地苏里格地区天然气勘探新进展[J].天然气工业,2007,27(12):6-11.YANG Hua,WEI Xinshan.New progress achieved by natural gas exploration in Sulige area[J].Natural Gas Industry,2007,27(12):6-11.
[15]郝蜀民,惠宽洋,李良.鄂尔多斯盆地大牛地大型低渗气田成藏特征及其勘探开发技术[J].石油与天然气地质,2006,27(6):762-768.HAO Shumin,HUI Kuanyang,LI Liang.Reservoiring features of Daniudi low-permeability gas field in Ordos Basin and its exploration and development technologies[J].Oil&Gas Geology,2006,27(6):762-768.
[16]刘新社,周立发,候云东.运用流体包裹体研究鄂尔多斯盆地上古生界天然气成藏[J].石油学报,2007,28(6):37-42.LIU Xinshe,ZHOU Lifa,HOU Yundong.Study of gas charging in the Upper Paleozoic of Ordos Basin using fluid inclusion[J].Acta Petrolei Sinica,2007,28(6):37-42.
[17]李熙喆,张满郎,谢武仁.鄂尔多斯盆地上古生界岩性气藏形成的主控因素与分布规律[J].石油学报,2009,30(2):168-175.LI Xizhe,ZHANG Manlang,XIE Wuren.Controlling factors for lithological gas reservoir and regularity of gas distribution in the Upper Paleozoic of Ordos Basin[J].Acta Petrolei Sinica,2009,30(2):168-175.
[18]李仲东,惠宽洋,李良,等.鄂尔多斯盆地上古生界天然气运移特征及成藏过程分析[J].矿物岩石,2008,28(3):77-83.LI Zhongdong,HUI Kuanyang,LI Liang,et al.Analysis of characteristics of gas migration and reservoir-forming in the Upper Paleozoic of northern Ordos Basin[J].Journal of Mineralogy and Petrology,2008,28(3):77-83.
[19]赵林,夏新宇,洪峰.鄂尔多斯盆地中部气田上古生界气藏成藏机理[J].天然气工业,2000,20(2):17-21.ZHAO Lin,XIA Xinyu,HONG Feng.Upper Paleozoic gas reservoir formation mechanism of the central gas field in Ordos Basin[J].Natural Gas Industry,2000,20(2):17-21.
[20]赵文智,汪泽成,朱怡翔,等.鄂尔多斯盆地苏里格气田低效气藏的形成机理[J].石油学报,2005,26(5):5-9.ZHAO Wenzhi,WANG Zecheng,ZHU Yixiang,et al.Forming mechanism of low-efficiency gas reservoir in Sulige Gas Field of Ordos Basin[J].Acta Petrolei Sinica,2005,26(5):5-9.
[21]曾溅辉,金之钧.油气二次运移和聚集物理模拟[M].北京:石油工业出版社,2000:74-83.ZENG Jianhui,JIN Zhijun.Physical simulation experiment of oil and gas secondary migration and accumulation[M].Beijing:Petroleum Industry Press,2000:74-83.
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