多条件约束地质建模技术在青西油田裂缝性油藏中的应用
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摘要
青西油田储层岩性复杂,岩相多变,裂缝发育,不同岩性、不同储集空间具有不同的储层属性特征,采用常规建模技术所建立的地质模型与油藏实际特征差别较大。采用多条件相互约束建模方法,将确定性模拟和随机模拟相结合,可较好地解决这些问题。多条件约束地质建模的约束条件包括:地震资料、岩心分析资料、测井资料、动态数据以及油田勘探开发综合研究成果;裂缝性油藏多条件约束地质建模技术包括断层封挡技术、多边界技术、复杂岩性岩相建模技术、DFN离散裂缝网格建模技术、在裂缝和岩相约束下的双重介质储层属性建模技术;构造建模主要利用GOCAD建模软件,裂缝建模利用FRACA建模软件,岩相和储层属性利用PETREL建模软件完成。根据建模结果,将青西油田划分出一类裂缝发育区、二类裂缝发育区和裂缝欠发育区,查明了剩余油富集区域和油气富集规律,明确了下一步的勘探目标。
Qingxi oilfield is a deep fractured reservoir, the oil-distribution is controlled by structures, sedimentary facies and fractures. By conventional geo-modeling methods, the results are not consistent with the reservoir characteristics. Multiple constraints geo-modeling technology can solve these problems. The technology considers both the attribute data interaction and other related data influences, including the seismic data, core analysis data, logging data, production data and all other research data. The key of this geo-modeling technology is processing of all kinds of faults, analyzing and processing of com-plicated boundaries, geo-modeling of complicated lithology, geomodeling of DFN discrete fracture grid, geomodeling of double porosity reservoir. By means of GOCAD for the structure geo-modeling, and FRACA for fracture geo-modeling,PETROL for lithology and reservoir geo-modeling, a reliable 3D geology model of Qingxi fractured reservoir has been made. The model indicates the area of different kind of fractures and the distribution of remaining oil. Therefore, multiple constraint geo-modeling method for fractured reservoir is proposed to guide geology modeling and development adjustment of similar reservoirs.
Qingxi oilfield is a deep fractured reservoir, the oil-distribution is controlled by structures, sedimentary facies and fractures. By conventional geo-modeling methods, the results are not consistent with the reservoir characteristics. Multiple constraints geo-modeling technology can solve these problems. The technology considers both the attribute data interaction and other related data influences, including the seismic data, core analysis data, logging data, production data and all other research data. The key of this geo-modeling technology is processing of all kinds of faults, analyzing and processing of com-plicated boundaries, geo-modeling of complicated lithology, geomodeling of DFN discrete fracture grid, geomodeling of double porosity reservoir. By means of GOCAD for the structure geo-modeling, and FRACA for fracture geo-modeling,PETROL for lithology and reservoir geo-modeling, a reliable 3D geology model of Qingxi fractured reservoir has been made. The model indicates the area of different kind of fractures and the distribution of remaining oil. Therefore, multiple constraint geo-modeling method for fractured reservoir is proposed to guide geology modeling and development adjustment of similar reservoirs.
引文
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[3]于金彪,杨耀忠,戴涛,等.油藏地质建模与数值模拟一体化应用技术[J].油气地质与采收率,2009,16(5):72-75.
[4]王建峰,彭小龙,王高旺,等.缝洞型油藏流动模型的选择方法[J].油气地质与采收率,2009,16(5):86-88.
[5]任殿星,李凡华,李保柱.多条件约束油藏地质建模技术[J].石油勘探与开发,2008,35(2):205-214.
[6]马彩琴,郑应钊.青西油田下白垩统裂缝—孔隙型复杂油藏油水分布规律研究[J].复杂油气田,2004,13(3):30-33.
[7]穆剑东,董平川,赵常生.多条件约束储层随机建模技术研究[J].大庆石油地质与开发,2008,27(4):17-20.
[8]谢风猛.东营凹陷平方王—平南潜山油藏裂缝性储层描述[J].油气地质与采收率,2010,17(3):42-44.
[9]郑应钊,马彩琴,苗福全,等.鸭儿峡志留系裂缝性潜山基岩油藏储层地质建模[J].石油地质与工程,2009,23(1):32-34.
[10]赵永杰,武刚,许坚,等.胜利油区基岩潜山储集体分布预测技术及应用[J].油气地质与采收率,2009,16(3):59-60,64.
[11]康永尚,沈金松.现代数学地质[M].北京:石油工业出版社,2005.
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