AHDAB油田碳酸盐岩储层综合研究
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摘要
AHDAB油田位于美索不达米亚前陆盆地的中部地区 ,主要产油层为白垩系的碳酸盐岩储层。该油田主要由 5套油层组成 ,其中上白垩统有 4套油层 ,下白垩统有 1套油层。 1997年 ,在该区进行过多次勘探工作 ,拥有710 km的二维地震资料和 7口井的测井资料 ,发现了 5套产油层 ,但对油藏控制因素认识不清 ,无法制定准确的开发方案。本文在东方地球物理公司对该区全部二维地震资料重新处理的基础上 ,通过精细构造解释、速度场研究、测井资料的储层综合评价、多井约束反演 ,最终通过确定性最小表面张力建模方法完成了 5套主要油层的三维构造模型和储层的三维属性模型 ,指出本区的油藏类型为构造、储层物性控制的层状边水复合型油气藏 ,并提供了 3口评价井井位。将所建立的三维油藏属性模型输入油藏模拟器 ,便可对油藏进行动态模拟 ,从而指导油藏开发方案的设计。
AHDAB oilfield is in the central part of Mesopotamia foreland basin,the major oil producing zone is Cretaceous carbonate reservoirs,which are composed of 5 oil-bearing strata,among which the 4 oil-bearing strata are in Upper Cretaceous and 1 oil-bearing stratum is in Lower Cretaceous.Since 1997,the explorations have been carried out many times in the area and have resulted in 710km of 2-D seismic data and logging data in 7 boreholes,5 oil producing zones have been found,but accurate development schedule can't be worked out because of unclear knowledge of control factors of reservoirs.Based on re-processed total 2-D seismic data in the area by BGP,through fine structural interpretation,study of velocity fields,integrative appreciation of reservoirs from logging data,multi-well constrained inversion and finally by using the determinative minimum surface tension model-building method,the paper finished the 3-D structure models and 3-D attributes models for these 5 oil-bearing strata,proposed that the reservoir type of this area is layered edge-water complex reservoir controlled by structure and physical property of reservoir and provided 3 appraisal wells.Input of created 3-D reservoir attributes model to reservoir modeler,the dynamic modeling of reservoir can be carried out,guiding the design of the schedule of reservoir development.
AHDAB oilfield is in the central part of Mesopotamia foreland basin,the major oil producing zone is Cretaceous carbonate reservoirs,which are composed of 5 oil-bearing strata,among which the 4 oil-bearing strata are in Upper Cretaceous and 1 oil-bearing stratum is in Lower Cretaceous.Since 1997,the explorations have been carried out many times in the area and have resulted in 710km of 2-D seismic data and logging data in 7 boreholes,5 oil producing zones have been found,but accurate development schedule can't be worked out because of unclear knowledge of control factors of reservoirs.Based on re-processed total 2-D seismic data in the area by BGP,through fine structural interpretation,study of velocity fields,integrative appreciation of reservoirs from logging data,multi-well constrained inversion and finally by using the determinative minimum surface tension model-building method,the paper finished the 3-D structure models and 3-D attributes models for these 5 oil-bearing strata,proposed that the reservoir type of this area is layered edge-water complex reservoir controlled by structure and physical property of reservoir and provided 3 appraisal wells.Input of created 3-D reservoir attributes model to reservoir modeler,the dynamic modeling of reservoir can be carried out,guiding the design of the schedule of reservoir development.
引文
[1] JanH.Comparison of constrained sparse spike andstochastic inversion for porosity prediction atKristinField.TheL eadingEdge,2000,4
[2] 王家华,张团峰.油气储层随机建模.北京:石油工业出版社,2001
[2] 王家华,张团峰.油气储层随机建模.北京:石油工业出版社,2001
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