缝洞型碳酸盐岩油藏致密隔层分布研究
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摘要
塔河油田奥陶系油藏储集层非均质性严重,油气水关系及油藏类型复杂。前期对此类油藏的三维地质建模强调定量表征300m范围内风化壳中发育的溶蚀洞穴、孔、缝的储集空间。然而随着塔河油田开发的不断深入,认识到纵向上几套缝洞型储集层间存在具一定封隔作用的致密灰岩段。综合应用储集层地质认识、测井、地震、单井生产动态资料,开展单井致密段及井间致密隔层对比研究,并在此基础上尝试建立了致密隔层三维分布模型,对评价储集层段横向连通性起到了积极作用,也为油藏注水方式、堵水措施及层段的选择提供了指导依据。
Tahe field is characterized by strong heterogeneity of the Ordovician carbonate reservoirs, complicated oil-gas-water relationship and complex reservoir type. The 3D geologic modeling has shown quantitative characterization of the pore, vug and fracture of the weathering crust within 300 m in the reservoir. But with in-depth development of Tahe field, it has been suggested there exist vertical dense limestone segments that play a role of barriers among the fractured-vuggy carbonate reservoirs. This paper conducts the correlation researches on well dense segment and interwell dense barriers by means of related geologic cognition and well logging, seismic and well performance data, by which the 3D model for dense limestone barrier is developed. This model can be helpful for evaluating the lateral connectivity of reservoirs and selecting the waterflood pattern, water shutoff measure and blocking interval.
Tahe field is characterized by strong heterogeneity of the Ordovician carbonate reservoirs, complicated oil-gas-water relationship and complex reservoir type. The 3D geologic modeling has shown quantitative characterization of the pore, vug and fracture of the weathering crust within 300 m in the reservoir. But with in-depth development of Tahe field, it has been suggested there exist vertical dense limestone segments that play a role of barriers among the fractured-vuggy carbonate reservoirs. This paper conducts the correlation researches on well dense segment and interwell dense barriers by means of related geologic cognition and well logging, seismic and well performance data, by which the 3D model for dense limestone barrier is developed. This model can be helpful for evaluating the lateral connectivity of reservoirs and selecting the waterflood pattern, water shutoff measure and blocking interval.
引文
[1]盛湘,张烨.塔河油田奥陶系碳酸盐岩地层转层酸压技术[J].石油钻探技术,2008,36(6):79-81.
[2]裴宗平,韩宝平,韩彦丽,等.任丘奥陶系岩溶发育规律及对油田开发的影响[J].中国矿业大学学报,2000,29(4):368-372.
[3]张达景,吕海涛,张涛,等.塔河油田加里东期岩溶储层特征及分布预测[J].沉积学报,2007,25(2):214-223.
[4]吴胜和,金振奎.储层建模[M].北京:石油工业出版社,2000:45-55.
[5]张淑娟,刘大听,罗永胜.潜山油藏内幕隔层及断层控制的剩余油分布模式[J].石油学报,2001,22(6):50-54.
[2]裴宗平,韩宝平,韩彦丽,等.任丘奥陶系岩溶发育规律及对油田开发的影响[J].中国矿业大学学报,2000,29(4):368-372.
[3]张达景,吕海涛,张涛,等.塔河油田加里东期岩溶储层特征及分布预测[J].沉积学报,2007,25(2):214-223.
[4]吴胜和,金振奎.储层建模[M].北京:石油工业出版社,2000:45-55.
[5]张淑娟,刘大听,罗永胜.潜山油藏内幕隔层及断层控制的剩余油分布模式[J].石油学报,2001,22(6):50-54.
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