复杂碳酸盐岩储层地质建模对策及应用——以靖边气田为例
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摘要
靖边气田陕200井区奥陶系碳酸盐岩储层各小层侵蚀沟槽分布复杂,剥蚀严重。研究区内沉积微相分布单一,缺乏地震数据体,应用传统的相控建模,很难保证储层建模结果的准确性。为准确刻画所选区域碳酸盐岩剥蚀储层的展布特征,在前人研究基础上,提出将研究区划分为沟槽相、储集相、干层3个相,将相控建模应用到储层随机建模中;同时,根据测井渗透率不能反映陕200井区裂缝发育的实际情况,提出根据试气无阻流量反推出地层渗透率,并用于储层确定性建模中。通过对比相控随机建模、确定建模与地质认识的符合程度,评价所选研究区碳酸盐岩剥蚀储层地质建模方法的适应性。研究表明,确定性建模与地质认识的符合性更好,建模储量与地质储量的误差更小,应用效果良好,从而说明确定性建模更适应所选研究区的储层建模,为后期水平井布井优化及气藏评价奠定了基础。
The distribution of erosion trench of the Ordovician carbonate reservoir layers in the Shaan 200 region in Jingbian gas field is very complex.Due to the single distribution of the sedimentary microfacies,and lack of seismic data in the study area,the traditional facies controlling modeling is difficult to ensure the accuracy of reservoir modeling results.In order to accurately depict the distribution characteristics of the selected region,on the basis of previous studies,we divide the study area into three-phase including trench phase,reservoir facies and dry layer,and apply facies controling modeling to stochastic reservoir modeling.At the same time,since the logging permeability can not reflect the actual situation,we deduce the permeability,and apply it to deterministic modeling.By comparing the stochastic modeling and deterministic modeling,we want to determine the compliance of the two kinds of modeling methods.Studies have shown that the deterministic modeling is of better compliance with geological knowledge,and the error between modeling reserves and geological reserves is smaller,thus the deterministic modeling is suitable for the reservoir modeling in the selected area.It provides a sound basis for the optimization of horizontal well sites and gas reservoir evaluation at late stage.
The distribution of erosion trench of the Ordovician carbonate reservoir layers in the Shaan 200 region in Jingbian gas field is very complex.Due to the single distribution of the sedimentary microfacies,and lack of seismic data in the study area,the traditional facies controlling modeling is difficult to ensure the accuracy of reservoir modeling results.In order to accurately depict the distribution characteristics of the selected region,on the basis of previous studies,we divide the study area into three-phase including trench phase,reservoir facies and dry layer,and apply facies controling modeling to stochastic reservoir modeling.At the same time,since the logging permeability can not reflect the actual situation,we deduce the permeability,and apply it to deterministic modeling.By comparing the stochastic modeling and deterministic modeling,we want to determine the compliance of the two kinds of modeling methods.Studies have shown that the deterministic modeling is of better compliance with geological knowledge,and the error between modeling reserves and geological reserves is smaller,thus the deterministic modeling is suitable for the reservoir modeling in the selected area.It provides a sound basis for the optimization of horizontal well sites and gas reservoir evaluation at late stage.
引文
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[2]Lan Yifei,Wang Dongxu,Fan Youhong.Application of facies-controlling modeling in the erosion carbonate reservoir[J].Natural Gas Industry,2007,27(8):52-53.[兰义飞,王东旭,樊友宏.相控建模在剥蚀残留碳酸盐岩储层中的应用[J].天然气工业,2007,27(8):52-53.]
[3]Yang Huiting,Jiang Tongwen,Yan Qibin,et al.Study ofthree-dimensional geological modeling method in vuggy car-bonate reservoirs[J].Petroleum Geology&Oilfield Develop-ment in Daqing,2004,23(4):11-12.[杨辉廷,江同文,颜其彬,等.缝洞型碳酸盐岩储层三维地质建模方法初探[J].大庆石油地质与开发,2004,23(4):11-12.]
[4]Chen Gongyang,Zhang Yonggui.Fracture and cave reservoirstochastic modeling of carbonate buried hill in Qianmiqiao ar-ea[J].Natural Gas Geoscience,2003,14(5):389-392.[陈恭洋,张永贵.千米桥潜山碳酸盐岩缝洞型储层随机建模[J].天然气地球科学,2003,14(5):389-392.]
[5]Jiang Xiangyun,Wang Zhizhang,Wu Shenghe.3Dreservoirmodeling and its application[J].Progress in Geophysics,2006,21(3):902-908.[姜香云,王志章,吴胜和.储层三维建模及在油藏描述中的应用研究[J].地球物理学进展,2006,21(3):902-908.]
[6]Zhao Bin,Hou Jiagen,Liu Yuming.Three dimensional model-ing and application of Ordovician carbonate cavity reservoirsin Tahe oilfield[J].Journal of Oil and Gas Technology:Jour-nal of Jianghan Petroleum Institute,2011,33(5):12-16.[赵彬,侯加根,刘钰铭.塔河油田奥陶系碳酸盐岩溶洞型储层三维地质建模与应用[J].石油天然气学报:江汉石油学院学报,2011,33(5):12-16.]
[7]Guo Kai,Shi Jing,Yang Yong.Study of 3Dvariation functionin reservoir stochastic modeling[J].Xinjiang Petroleum Geol-ogy,2007,28(2):179-181.[郭凯,史静,杨勇.储集层随机建模中三维变差函数研究[J].新疆石油地质,2007,28(2):179-181.]
[8]Wang Yuehua,Pi Xuejun,Zhang Boqiao.The use of reservoirgeological modeling in gas reservoir description:Examplefrom the Kela2gas field[J].Natural Gas Geoscience,2003,14(1):65-68.[王月华,皮学军,张柏桥.储层地质建模方法在克拉2气田气藏描述中的应用[J].天然气地球科学,2003,14(1):65-68.]
[9]Yang Yong,Wu Lei,Liu Henian,et al.Study on the acquire-ment of robust variogram in stochastic modeling[J].Fault-block Oil&Gas Field,2005,12(6):21-23.[杨勇,吴蕾,刘合年,等.随机建模中稳健变差函数求取研究[J].断块油气田,2005,12(6):21-23.]
[10]Dou Songjiang,Zhao Yuwen,Xu Fang,et al.Difficulties andcountermeasures of geological modeling in Chenghai oil field[J].Natural Gas Geoscience,2010,21(4):652-656.[窦松江,赵郁文,徐芳,等.埕海油田地质建模过程中的难点及对策[J].天然气地球科学,2010,21(4):652-656.]
[11]Wang Zuoqian,Huang Shunv,He Shunli.New methods of re-serves estimation for the lower Paleozoic carbonate gas reser-voir of Jingbian gas field[J].Special Oil&Gas Reservoirs,2010,17(6):21-24.[王作乾,黄淑女,何顺利.靖边气田下古碳酸盐岩气藏储量计算新方法[J].特种油气藏,2010,17(6):21-24.]
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