用物探预测方法对岩性气藏有利目标区作选区评价——以鄂尔多斯盆地大牛地气田为例
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摘要
地质方法描述成藏要素组合关系由于受到钻、测井资料空间分布局限性的影响,导致描述结果与实际地质特征间存在较大的差异,而用地震资料丰富的空间信息参与描述则能有效提高油气成藏要素的描述精度。其关键是找到勘探目标区块油气成藏的主控因素,进而用物探方法描述成藏主控因素及其空间组合关系。为此,以鄂尔多斯盆地大牛地气田为例,根据其"古地貌控沉积,相控储层,高压封闭、近源成藏"的特点,梳理出了成藏主控因素——古构造、沉积相和烃源岩,再利用物探方法研究构造沉积演化,预测烃源岩分布,选区评价出D66、D12、D17等一系列有利目标区块,随后均被勘探开发所证实。大牛地气田的成功实践拓宽了岩性气藏的研究思路。
The geological description of reservoir petroleum system elements usually can not accurately map the subsurface geological features due to the limitations of spatial distribution of drilling and logging data.In comparison,integration of seismic data which contain rich spatial information can effectively improve the accuracy of reservoir element mapping.The key is to identify the major controlling factors of hydrocarbon accumulation and then map these major factors and their spatial combinations by use of geophysical methods.Taking the Daniudi Gas Field in the Ordos Basin as an example,we first identified the major controlling factors of hydrocarbon accumulation,i.e.,palaeo-structure,sedimentary facies and source rocks,according to its geologic characteristics of "palaeomorphology controlling sedimentation,sedimentary facies controlling reservoirs,high pressure sealing and near-source accumulation".Then,we studied tectonic and sedimentary evolution and mapped distribution of source rocks by using geophysical methods.Commercial gas discoveries have been successfully found in the target blocks that we identified and evaluated such as D66,D12 and D17.This case study provides a new idea for the exploration of lithologic gas reservoirs.
The geological description of reservoir petroleum system elements usually can not accurately map the subsurface geological features due to the limitations of spatial distribution of drilling and logging data.In comparison,integration of seismic data which contain rich spatial information can effectively improve the accuracy of reservoir element mapping.The key is to identify the major controlling factors of hydrocarbon accumulation and then map these major factors and their spatial combinations by use of geophysical methods.Taking the Daniudi Gas Field in the Ordos Basin as an example,we first identified the major controlling factors of hydrocarbon accumulation,i.e.,palaeo-structure,sedimentary facies and source rocks,according to its geologic characteristics of "palaeomorphology controlling sedimentation,sedimentary facies controlling reservoirs,high pressure sealing and near-source accumulation".Then,we studied tectonic and sedimentary evolution and mapped distribution of source rocks by using geophysical methods.Commercial gas discoveries have been successfully found in the target blocks that we identified and evaluated such as D66,D12 and D17.This case study provides a new idea for the exploration of lithologic gas reservoirs.
引文
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[11]郭彤楼.元坝深层礁滩气田基本特征与成藏主控因素[J].天然气工业,2011,31(10):12-16.GUO Tonglou.Basic characteristics of deep reef-bank res-ervoirs and major controlling factors of gas pools in theYuanba Gas Field[J].Natural Gas Industry,2011,31(10):12-16.
[12]姜贻伟,刘红磊,杨福涛,等.震控储层建模方法及其在普光气田的应用[J].天然气工业,2011,31(3):14-17.JIANG Yiwei,LIU Honglei,YANG Futao,et al.Seismic-constrained reservoir modeling and its application in thePuguang Gas Field[J].Natural Gas Industry,2011,31(3):14-17.
[13]宋维琪,徐文会.含气储层预测方法及应用[J].天然气工业,2008,28(2):61-63.SONG Weiqi,XU Wenhui.A method on gas reservoir pre-diction and its application[J].Natural Gas Industry,2008,28(2):61-63.
[14]BATZLE M L,HAN D H,HOFMANN R.Fluid mobilityand frequency-dependent seismic velocity:Direct measure-ments[J].Geophysics,2006,71(1):1-9.
[15]夏红敏,王尚旭,李生杰.含气地层的AVO响应分析——以苏4井为例[J].石油物探,2006,45(4):357-361.XIA Hongmin,WANG Shangxu,LI Shengjie.AVO anal-ysis on gas-bearing layer-in Su 4well as an example[J].Geophysical Prospecting for Petroleum,2006,45(4):357-361.
[16]曾大乾,彭鑫岭,刘志远,等.普光气田礁滩相储层表征方法[J].天然气工业,2011,31(3):9-13.ZENG Daqian,PENG Xinling,LIU Zhiyuan,et al.Charac-terization methods of reef-beach facies reservoirs in thePuguang Gas Field[J].Natural Gas Industry,2011,31(3):9-13.
[2]张卫华.大牛地气田盒3段富气储层反射模式及预测[J].天然气工业,2009,29(4):33-35.ZHANG Weihua.Reflection pattern and prediction on gasrich reservoir of H3member in Daniudi Gas Field[J].Nat-ural Gas Industry,2009,29(4):33-35.
[3]曾忠,阎世信,魏修成,等.地震属性解释技术的研究及确定性分析[J].天然气工业,2006,26(3):41-43.ZENG Zhong,YAN Shixin,WEI Xiucheng,et al.Study ofseismic attribute interpretation technologies and determinis-tic analysis[J].Natural Gas Industry,2006,26(3):41-43.
[4]张洪波,王纬,顾汉明.高精度地震属性储层预测技术研究[J].天然气工业,2005,25(7):35-37.ZHANG Hongbo,WANG Wei,GU Hanming.High-accu-racy seismic attribute reservoir prediction technique[J].Natural Gas Industry,2005,25(7):35-37
[5]甘利灯,赵邦六,杜文辉.弹性阻抗在岩性与流体预测中的潜力分析[J].石油物探,2005,44(5):504-508.GAN Lideng,ZHAO Bangliu,DU Wenhui.The potential a-nalysis of elastic impedance in the lithology and fluid pre-diction[J].Geophysical Prospecting for Petroleum,2005,44(5):504-508.
[6]范小军.川东北元坝地区长兴组与飞仙关组天然气成藏差异性成因[J].天然气工业,2012,32(6):15-20.FAN Xiaojun.Causes of differences of natural gas poolingbetween the Changxing Formation and the FeixianguanFormation in Yuanba,Sichuan Basin[J].Natural Gas Indus-try,2012,32(6):15-20.
[7]刘晓光,陈启林,白云来,等.鄂尔多斯盆地中寒武统张夏组沉积相特征及岩相古地理分析[J].天然气工业,2012,32(5):14-18.LIU Xiaoguang,CHEN Qilin,BAI Yunlai,et al.Sedimenta-ry facies and lithofacies palaeogeography of the MiddleCambrian Zhangxia Formation in the Ordos Basin[J].Natu-ral Gas Industry,2012,32(5):14-18.
[8]李双建,周雁,高波,等.大巴山山前带油气成藏条件与勘探方向[J].天然气工业,2012,32(6):9-14.LI Shuangjian,ZHOU Yan,GAO Bo,et al.Hydrocarbonpooling conditions of the foothill belt of the DabashanMountain and exploration direction[J].Natural Gas Indus-try,2012,32(6):9-14.
[9]杨华,包洪平.鄂尔多斯盆地奥陶系中组合成藏特征及勘探启示[J].天然气工业,2011,31(12):11-20.YANG Hua,BAO Hongping.Characteristics of hydrocar-bon accumulation in the middle Ordovician assemblages andtheir significance for gas exploration in the Ordos Basin[J].Natural Gas Industry,2011,31(12):11-20.
[10]周家雄,刘薇薇,孙月成,等.小于地震分辨率极限的薄储集层预测技术[J].新疆石油地质,2010(5):554-556.ZHOU Jiaxiong,LIU Weiwei,SUN Yuecheng,et al.Pre-diction of thin reservoir thickness less than seismic resolu-tion limitation[J].Xinjiang Petroleum Geology,2010(5):554-556.
[11]郭彤楼.元坝深层礁滩气田基本特征与成藏主控因素[J].天然气工业,2011,31(10):12-16.GUO Tonglou.Basic characteristics of deep reef-bank res-ervoirs and major controlling factors of gas pools in theYuanba Gas Field[J].Natural Gas Industry,2011,31(10):12-16.
[12]姜贻伟,刘红磊,杨福涛,等.震控储层建模方法及其在普光气田的应用[J].天然气工业,2011,31(3):14-17.JIANG Yiwei,LIU Honglei,YANG Futao,et al.Seismic-constrained reservoir modeling and its application in thePuguang Gas Field[J].Natural Gas Industry,2011,31(3):14-17.
[13]宋维琪,徐文会.含气储层预测方法及应用[J].天然气工业,2008,28(2):61-63.SONG Weiqi,XU Wenhui.A method on gas reservoir pre-diction and its application[J].Natural Gas Industry,2008,28(2):61-63.
[14]BATZLE M L,HAN D H,HOFMANN R.Fluid mobilityand frequency-dependent seismic velocity:Direct measure-ments[J].Geophysics,2006,71(1):1-9.
[15]夏红敏,王尚旭,李生杰.含气地层的AVO响应分析——以苏4井为例[J].石油物探,2006,45(4):357-361.XIA Hongmin,WANG Shangxu,LI Shengjie.AVO anal-ysis on gas-bearing layer-in Su 4well as an example[J].Geophysical Prospecting for Petroleum,2006,45(4):357-361.
[16]曾大乾,彭鑫岭,刘志远,等.普光气田礁滩相储层表征方法[J].天然气工业,2011,31(3):9-13.ZENG Daqian,PENG Xinling,LIU Zhiyuan,et al.Charac-terization methods of reef-beach facies reservoirs in thePuguang Gas Field[J].Natural Gas Industry,2011,31(3):9-13.
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