滨里海盆地Д南石炭系碳酸盐岩储层类型及分布特征
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摘要
在滨里海盆地东缘Д南石炭系碳酸盐岩KT-II含油层系Д层岩心和录井资料稀缺的情况下,针对该区油气发现多年但储量一直未有效动用,导致碳酸盐岩储层钻井结果见效差、单井初始产能差异大的生产矛盾。通过井筒资料精细对比分析,确定Д南难动用储量区Д层复杂储层的有利层段为Д1底部鲕粒白云质灰岩所在的白云岩化带,该储层主要为孔洞缝复合型和孔隙-裂缝型。结合古构造和沉积相特征,确定储层有利分布相带为开阔台地相浅滩亚相滩微相,原始沉积环境和白云岩化作用控制着储层的发育。在有利相带约束下,优选地震属性并进行叠前叠后储层反演,根据储层厚度、孔隙度、裂缝发育程度及含烃指示等因素综合评价,预测Д1层复杂碳酸盐岩储层发育区为近NE SW向带状分布,为该区提高储量动用程度和钻井见效提供地质参考依据。
Given the shortage of core and mud logging data on the Д zone of Carboniferous KT-II of the southern ofДarea in the eastern edge of Pre-Caspin basin,The oolitic dolomitic limestone on the lower of Д1 layer was defined as favorable reservoir layer in Carboniferous KT-II by the detailed analysis on borehole data in the southern of Д area in the eastern margin of Pre-Caspin basin.This favorable reservoir in Д1 layer are pore-vug-fracture composite and pore-fracture.The favorable sedimentary faciesbelt with beach miscorfacies of shoal subfacies in open platform facies is determined combined with the paleostructure and sedimentary facies.The carbonate rock reservoir in Д1 layer was controlled with both original depositional environments and dolomitization.Based on the sedimentary facies constraints and the optional seismic attributes selection with the pre-stack and post stack inversion,the advantageous reservoirs distribution with NE-SW belts on Д1 layer is predicted considering the thickness,porosity,fracture and hydrocarbon indicator on carbonate rock reservoir.All these provide the effective and prospective geological references for drilling and production for KT-II.
Given the shortage of core and mud logging data on the Д zone of Carboniferous KT-II of the southern ofДarea in the eastern edge of Pre-Caspin basin,The oolitic dolomitic limestone on the lower of Д1 layer was defined as favorable reservoir layer in Carboniferous KT-II by the detailed analysis on borehole data in the southern of Д area in the eastern margin of Pre-Caspin basin.This favorable reservoir in Д1 layer are pore-vug-fracture composite and pore-fracture.The favorable sedimentary faciesbelt with beach miscorfacies of shoal subfacies in open platform facies is determined combined with the paleostructure and sedimentary facies.The carbonate rock reservoir in Д1 layer was controlled with both original depositional environments and dolomitization.Based on the sedimentary facies constraints and the optional seismic attributes selection with the pre-stack and post stack inversion,the advantageous reservoirs distribution with NE-SW belts on Д1 layer is predicted considering the thickness,porosity,fracture and hydrocarbon indicator on carbonate rock reservoir.All these provide the effective and prospective geological references for drilling and production for KT-II.
引文
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[17]刘洛夫,朱毅秀,熊正祥,等.滨里海盆地的岩相古地理特征及其演化[J].古地理学报,2003,5(3):279-287.Liu Luofu,Zhu Yixiu,Xiong Zhengxiang,et al.Characteristics and Evolution of Lithofacies Palaepgepgraphy in Pre-Caspian Basin[J].Journal of Palaeogeography,2003,5(3):279-287.
[18]张学丰,刘波,蔡忠贤,等.白云岩化作用与碳酸盐岩储层物性[J].地质科技情报,2010,29(3):79-83.Zhang Xuefeng,Liu Bo,Cai Zhongxian,et al.Dolomitization and Carbonate Reservoir Formation[J].Geological Science and Technology Information,2010,29(3):79-83.
[19]汤朝阳,王敏,姚华舟,等.白云石化作用及白云岩问题研究述评[J].东华理工学院学报,2006,29(3):205-209.Tang Chaoyang,Wang min,Yao Huazhou,et al.Current Topics About Dolomitization and the Problem of Dolostones[J].Journal of East China Institute of Technology,2006,29(3):205-209.
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[2]方甲中,吴林刚,高岗,等.滨里海盆地碳酸盐岩储集层沉积相与类型[J].石油勘探与开发,2008,35(4):498-508.Fang Jiazhong,Wu Lingang,Gao Gang,et al.Sedimentary Facies and Types of Carbonate Rock Reservoir in Caspian Seashore Basin:A Case from Carboniferous KT-II Member in Zahnanor Oilfield[J].Petroleum Exploration and Development,2008,35(4):498-508.
[3]赵中平,牟小清,陈丽.滨里海盆地东缘石炭系碳酸盐岩储层主要成岩作用及控制因素分析[J].现代地质,2009,23(5):828-834.Zhao Zhongping,Mu Xaioqing,Chen Li.Analysis on Main Diagenesises and Controlling Factors of Carboniferous Carnate Reservoirs in the Eastern Margin of Pre-Caspian Basin[J].Geoscience,2009,23(5):828-834.
[4]徐可强.滨里海盆地东缘中东块油气成藏特征和勘探实践[M].北京:石油工业出版社,2011.Xu Keqiang.Characteristics and Exploration Practice in Eastern Edge of the Middle East-Caspian Basin Block Reservoir[M].Beijing:Oil Industry Press,2011.
[5]樊长江.滨里海盆地典型盐下碳酸盐岩油藏地震成像和储层预测研究[D].北京:中国地质大学,2006.Fan Changjiang.Seismic Imaging and Reservoir Prediction of Typical Pre-Salt Carbonate Reservoirs in Pre-Caspian Sea Basin[D].Beijing:China University of Geosciences,2006.
[6]Zheng Xiaodong,Xu Anna,Yang Zhifang,et al.Seismic Prediction of Prolific Oil Zones in Carbonate Reservoirs with Extremely Low Porosity and Permeability Under Salt[J].Applied Geophysics,2005,2(2):103-110.
[7]张奎林.滨里海地区巨厚盐膏层蠕动规律研究[D].东营:中国石油大学(华东),2009.Zhang Kuilin.Study on the Creep Law of Super Thick Salt Beds in Pre-Caspian Basin[D].Dongying:China University of Petroleum(East China),2009.
[8]代双河,高军,臧殿光,等.滨里海盆地东缘巨厚盐岩区盐下构造的解释方法研究[J].石油地球物理勘探,2006,41(3):303-307,322.Dai Shuanghe,Gao Jun,Zang Dianguang,et al.Interpretation Method of Subsalt Structures in Significant Thickness of Salt Beds,East Merging of Littoral Casoian Sea Basin[J].Oil Geophysical Prospecting,2006,41(3):303-307,322.
[9]李永宏,Burlin Y K.滨里海盆地南部盐下大型油气田石油地质特征及形成条件[J].石油与天然气地质,2005,26(6):840-846.Li Yonghong,Burlin Y K.Characteristics of Petroleum Geology and Formation Conditions of Large Oil and Gas Fields Below Halite in Southern PreCaspian Basin[J].2005,26(6):840-846.
[10]王波,王雪梅.滨里海盆地盐下构造假象识别及真实形态恢复[J].中国石油勘探,2008(1):63-67.Wang Bo,Wang Xumei.Research on Pre-Salt Pseudo Structures Identification and Real Shapes Restoration in Salt Dome Areas of Pre-Caspian Basin[J].China Petroleum Exploration,2008(1):63-67.
[11]金之钧,王骏,张生根,等.滨里海盆地盐下油气成藏主控因素及勘探方向[J].石油实验地质,2007,29(2):111-115.Jin Zhijun,Wang Jun,Zhang Shenggen,et al.Main Factors Controlling Hydrocarbon Reservoirs and Exploration Directions in the Pre-Salt Sequence in Pre-Caspian Basin[J].Petroleum Geology&Experiment,2007,29(2):111-115.
[12]史丹妮,杨双.滨里海盆地盐岩运动及相关圈闭类型[J].岩性油气藏,2007,19(3):73-79.Shi Danni,Yang Shuang.Salt Movement and the Types of Related Traps in Pre-Caspian Basin[J].Lithologic Reservoirs,2007,19(3):73-79.
[13]高军,刘雅琴,于京波,等.滨里海盆地东缘中区块盐下构造识别与储层预测[J].石油地球物理勘探,2008,43(增刊1):98-102.Gao Jun,Liu Yaqin,Yu Jingbo,et al.Identifying Subsalt Structure and Reservoir Prediction in Central Block of Eastern Margin of Pre-Caspian Basin[J].Oil Geophysical Prospecting,2008,43(Sup.1):98-102.
[14]王学军,王志欣,李兆刚,等.滨里海盆地M探区盐下层系有利储集相带[J].新疆石油地质,2009,30(1):142-146.Wang Xuejun,Wang Zhixin,Li Zhaogang,et al.The Favorable Reservoir Facies Belts of Subsalt Complex in Mezhdurechensky Block of Pre-Caspian Basin[J].Xin Jiang Petroleum Geology,2009,30(1):142-146.
[15]刘东周.滨里海叠合含油气盆地地质特征及东部盐下成藏规律研究[D].北京:中国地质大学(北京),2006.Liu Dongzhou.Seismic Imaging and Reservoir Prediction of Typical Pre-Salt Carbonate Reservoirs in Pre-Caspian Sea Basin[D].Beijing:China University of Geosicences(Beijing),2006.
[16]陈洪涛,李建英,范哲清,等.滨里海盆地B区块盐丘形成机制和构造演化分析[J].石油地球物理勘探,2008,43(增刊1):103-107.Chen Hongtao,Li Jianying,Fan Zheqing,et al.Forming Mechanism of Salt Dome and Analysis of Tectonic Evolution in B Block of Pre-Caspian Basin[J].Oil Geophysical Prospecting,2008,43(Sup.1):103-107.
[17]刘洛夫,朱毅秀,熊正祥,等.滨里海盆地的岩相古地理特征及其演化[J].古地理学报,2003,5(3):279-287.Liu Luofu,Zhu Yixiu,Xiong Zhengxiang,et al.Characteristics and Evolution of Lithofacies Palaepgepgraphy in Pre-Caspian Basin[J].Journal of Palaeogeography,2003,5(3):279-287.
[18]张学丰,刘波,蔡忠贤,等.白云岩化作用与碳酸盐岩储层物性[J].地质科技情报,2010,29(3):79-83.Zhang Xuefeng,Liu Bo,Cai Zhongxian,et al.Dolomitization and Carbonate Reservoir Formation[J].Geological Science and Technology Information,2010,29(3):79-83.
[19]汤朝阳,王敏,姚华舟,等.白云石化作用及白云岩问题研究述评[J].东华理工学院学报,2006,29(3):205-209.Tang Chaoyang,Wang min,Yao Huazhou,et al.Current Topics About Dolomitization and the Problem of Dolostones[J].Journal of East China Institute of Technology,2006,29(3):205-209.
[20]赫云兰,刘波,秦善.白云石化机理与白云岩成因问题研究[J].北京大学学报:自然科学版,2010,46(6):1010-1018.He Yunlan,Liu Bo,Qin Shan.Study on the Dolomitization and Dolostone Genesis[J].Acta Scientiarum Naturalium Universitis Pekinensis,2010,46(6):1010-1018.
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