岩溶高地风化壳有利勘探区的储层地震预测技术——以鄂尔多斯盆地苏5区块马五_4~1层为例
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
下奥陶统马家沟组风化壳储层是鄂尔多斯盆地苏里格气田重要的接替产层,具有"储层厚度薄、非均质性强、孔隙结构复杂"三大特点,多种储层发育控制因素共同作用,致使有利勘探区的预测难度极大。为此,从苏5区块马五41储层的地球物理响应特征出发,对古岩溶高地上的风化壳储层解释技术进行了新的探索:应用构造导向滤波技术提高原始地震资料信噪比,在此基础上利用地震振幅及几何属性分别对孔洞和微断裂进行预测;利用印模法进行古地貌恢复,精细刻画局部岩溶构造单元;进行精细构造解释落实局部微幅圈闭。结合上述成果对马五41储层有利勘探目标进行综合预测,经实钻井验证应用效果良好,实现了苏里格气田马家沟组风化壳储层勘探上的突破,并取得了以下认识:1沉积、古岩溶和微幅构造共同影响苏里格气田岩溶高地风化壳气藏的发育;2通过古地貌分析寻找岩溶发育区及刻画沟槽展布规律是研究马五41储层的关键;3地震分频振幅属性和几何属性相结合是研究岩溶储层储集空间的有效技术手段;4微幅构造影响马五41层复合气藏的气水分布。
The weathered crust reservoirs in the Majiagou Fm are important potential pay zones for the successive production in the Sulige Gas Field of the Ordos Basin.However,they are characterized by "small thickness,strong heterogeneity and complex watergas contact" and their development is controlled jointly by multiple factors,thus their accurate mapping is quite challenging.In view of the geophysical responses of O1m541(the first interval of 4th sub-member in the 5th member of the Lower Ordovician Majiagou Fm)in Block Su 5,we studied the seismic prediction techniques of the weathered crust reservoirs on fossil karst highlands.The structural-oriented filtering technique was used to improve the SNR of the raw seismic data.The seismic amplitude and geometric attributes were used to predict pores,vugs and microfractures respectively.The moulding method was applied to restore palaeotopography and describe in detail the local karst structural units.Local traps with small amplitudes were mapped through detailed structural interpretation.The comprehensive prediction results of the favorable exploration targets in the O1m541 were well verified by drilling data,leading to a breakthrough of exploration of weathered crust reservoirs in the Majiagou Fm in the Sulige Gas Field.The following understandings were obtained.(1)Sedimentation,palaeo-karst and small-amplitude structures jointly control the development of the weathered crust reservoirs on karst highlands in the Sulige Gas Field.(2)Identification of areas with well-developed karst through palaeogeomorphic analysis is the key to the study of reservoirs in O1m541.(3)Integration of seismic frequency-division amplitude attributes with geometric attributes is an effective way to study the space of karst reservoirs.(4)Small-amplitude structures influence the gas-water contact of the composite gas reservoirs in O1m541.
引文
[1]罗平,张静,刘伟,等.中国海相碳酸盐岩油气储层基本特征[J].地学前缘,2008,15(1):36-50.LUO Ping,ZHANG Jing,LIU Wei,et a1.Characteristics of marine carbonate hydrocarbon reservoirs in China[J].Earth Science Frontiers,2008,15(1):36-50.
    [2]陈学时,易万霞,卢文忠.中国油气田古岩溶与油气储层[J].沉积学报,2004,22(2):244-252.CHEN Xueshi,YI Wanxia,LU Wenzhong.The paleokarst reservoirs of oil/gas fields in China[J].Acta Sedimentologica Sinica,2004,22(2):244-253.
    [3]汪泽成,李宗银,李玲,等.中国古老海相碳酸盐岩油气成藏组合的评价方法及其应用[J].天然气工业,2013,33(6):7-15.WANG Zecheng,LI Zongyin,LI Ling,et al.Assessing ancient marine carbonate plays in China[J].Natural Gas Industry,2013,33(6):7-15.
    [4]李浮萍,卢涛,唐铁柱,等.苏里格气田东区下古生界马五41储层综合评价[J].石油天然气学报,2012,34(7):32-37.LI Fuping,LU Tao,TANG Tiezhu,et al.Comparehensive evaluation of reservoir Mawu41 in Lower Paleozoic in the east of Sulige gas-field[J].Journal of Oil and Gas Technology,2012,34(7):32-37.
    [5]李振宏,郑聪斌.鄂尔多斯盆地东部奥陶系储层特征及控制因素[J].天然气地球科学,2004,15(6):604-609.LI Zhenhong,ZHENG Congbin.The reservoir heterogeneity and controlled factors of Ordovician in the eastern Ordos Basin[J].Natural Gas Geoscience,2004,15(6):604-609.
    [6]张岳华,雷卞军,杨勇,等.苏里格南区马五41储层特征及控制因素[J].天然气技术与经济,2013,7(5):20-22.ZHANG Yuehua,LEI Bianjun,YANG Yong,et al.Characteristics and controlling factors of Mawu41 Reservoir in South Block,Sulige Gasfield[J].Natural Gas Technology and Economy,2013,7(5):20-22.
    [7]苏中堂,陈宏德,林良彪,等.靖边气田北部下奥陶统马五41段古岩溶储层特征及其控制因素[J].矿物岩石,2011,31(1):89-96.SU Zhongtang,CHEN Hongde,LIN Liangbiao,et al.Characteristics and control factors of palaeokarst reservoir of the Majiagou Formation of Lower Ordovician in northern Jingbian gas field of Ordos Basin[J].Journal of Mineralogy and Petrology,2011,31(1):89-96.
    [8]杨华,刘新社,张道峰.鄂尔多斯盆地奥陶系海相碳酸盐岩天然气成藏主控因素及勘探进展[J].天然气工业,2013,33(5):1-11.YANG Hua,LIU Xinshe,ZHANG Daofeng.Main controlling factors of gas pooling in Ordovician marine carbonate reservoirs in the Ordos Basin and advances in gas exploration[J].Natural Gas Industry,2013,33(5):1-11.
    [9]欧阳永林,马晓明,郭小龙,等.利用分频地震属性进行古风化壳岩溶储层预测——以千米桥潜山凝析气田为例[J].天然气地球科学,2008,19(3):381-384.OUYANG Yonglin,MA Xiaoming,GUO Xiaolong,et al.Prediction of ancient weathering crust karst reservoirs using separate frequency seismic attributes[J].Natural Gas Geoscience,2008,19(3):381-384.
    [10]龚洪林,王振卿,李录明,等.应用地震分频技术预测碳酸盐岩储层[J].地球物理学进展,2008,23(1):129-135.GONG Honglin,WANG Zhenqing,LI Luming,et al.Predicting carbonate reservoir by applying seismic spectral decomposition technique[J].Progress in Geophysics,2008,23(1):129-135.
    [11]赵明章,范雪辉,刘春芳,等.利用构造导向滤波技术识别复杂断块圈闭[J].石油地球物理勘探,2011,46(1):128-133.ZHANG Mingzhang,FAN Xuehui,LIU Chunfang,et al.Complex fault-block traps identification with structureoriented filter[J].Oil Geophysical Prospecting,2011,46(1):128-133.
    [12]方海飞,周赏,王永莉,等.几何类属性深度处理技术在断层解释中的应用[J].石油地球物理勘探,2013,48(1):120-124.FANG Haifei,ZHOU Shang,WANG Yongli,et al.Geometric attribute improved-processing in fault interpretation[J].Oil Geophysical Prospecting,2013,48(1):120-124.
    [13]李志军,张瀛,窦煜,等.曲率法致密砂岩储层裂缝预测[J].西南石油大学学报:自然科学版,2013,35(6):57-63.LI Zhijun,ZHANG Ying,DOU Yu,et al.Fracture prediction in tight sandstone reservoir with curvature method[J].Journal of Southeast Petroleum Institute:Science&Technology Edition,2013,35(6):57-63.
    [14]汲生珍,邬兴威,夏东领,等.地震相裂缝分级技术在储层预测中的应用[J].西南石油大学学报:自然科学版,2012,34(3):71-77.JI Shengzhen,WU Xingwei,XIA Dongling,et al.Application of seismic facies technique for fracture classfication in reservoir prediction[J].Journal of Southeast Petroleum Institute:Science&Technology Edition,2012,34(3):71-77.
    [15]张宏,董宁,郑浚茂,等.鄂尔多斯盆地东部奥陶系古沟槽三维地震识别方法[J].石油学报,2010,31(3):415-419.ZHANG Hong,DONG Ning,ZHENG Junmao,et al.3D seismic identification technique for Ordovician erosion flutes in the eastern Ordos Basin[J].Acta Petrolei Sinica,2010,31(3):415-419.
    [16]张庆玉,陈利新,梁彬,等.轮古西地区前石炭纪古岩溶微地貌特征及刻画[J].海相油气地质,2012,17(4):23-26.ZHANG Qingyu,CHEN Lixin,LIANG Bin,et al.Characterization of Precarboniferous Karst Microgeomorphology in the West Part of Lungu Oilfield,Tarim Basin[J].Marine Origin Petroleum Geology,2012,17(4):23-26.
    [17]李宗杰,刘群,李海英,等.地震古岩溶学理论及应用[J].西南石油大学学报:自然科学版,2013,35(6):9-19.LI Zongjie,LIU Qun,LI Haiying,et al.Theory and application of seismic palaeokarst[J].Journal of Southeast Petroleum Institute:Science&Technology Edition,2013,35(6):9-19.
    [18]庞艳君,代宗仰,刘善华,等.川中乐山—龙女寺古隆起奥陶系风化壳古地貌恢复方法及其特征[J].石油地质与工程,2007,21(5):8-15.PANG Yanjun,DAI Zongyang,LIU Shanhua,et al.Restoration method of Ordovician weathering crust paleo geomorphology of Leshan-longnüsi temple palehigh and its features in central Sichuan[J].Petroleum Geology and Engineering,2007,21(5):8-15.
    [19]杨华,包洪平,马占荣.侧向供烃成藏—鄂尔多斯盆地奥陶系膏盐岩下天然气成藏新认识[J].天然气工业,2014,34(4):1-8.YANG Hua,BAO Hongping,MA Zhanrong.Reservoirforming by lateral supply of hydrocarbon:A new understanding of the formation of Ordovician gas reservoirs under gypsolyte in the Ordos Basin[J].Natural Gas Industry,2014,34(4):1-8.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心