储层综合预测技术在塔里木盆地碳酸盐岩中的应用
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摘要
塔里木盆地碳酸盐岩岩溶型储集层具有埋藏深、非均质性强的特点 ,利用某种单一技术很难对岩溶型储集层进行较为准确的预测。文章针对碳酸盐岩岩溶型储集层发育和分布的特点 ,对其在地震资料上的响应特征进行深入的分析 ;然后应用地震属性参数分析、古地貌恢复、应变量分析裂缝预测、井约束条件下的全三维波阻抗反演等技术方法进行预测分析 ,认为在地震属性上低相干、强振幅、振幅横向变化率较大、古地貌斜坡部位及古水系两侧、高应变量及裂缝密度较高的区域为碳酸盐岩岩溶发育区 ;最后利用以上属性参数进行多参数融合 ,对碳酸盐岩岩溶型储集层进行综合预测评价 ,划分出有利和较有利的岩溶发育区带 ,指导井位部署和储量计算等工作。通过多口井的实际钻探结果表明 ,储层预测评价结果是较为可靠的 ,并为井位部署和储量计算提供了可靠的地质依据
Because the carbonate karst reservoirs in Talimu Basin are of the characters as great burial depth,strong heterogeneity,etc.,it is very difficult to predict relatively accurately the karst reservoirs by one single technique.In the paper,the seismic response characteristics of the carbonate karst reservoir development and distribution are analyzed deepgoingly;then,through karst reservoir prediction by use of the seismic attribution parameter analysis,paleogeomorphological restoration,strain quantity analysis fracture prediction,well-restrained full 3-D wave impedance inversion techniques,it was considered that the carbonate karst development zones include the areas with low coherence,strong amplitude and relatively large amplitude lateral change rate in seismic attribution,the paleogeomorphological slope portion,the both sides of ancestral river and the high strain quantity and high fracture density areas;and then the comprehensive prediction and evaluation of carbonate karst reservoirs are carried out by applying the multiparameter fusion of above mentioned attribution parameters and the favourable and relatively favourable carbonate karst development zones are divided up for well pattern arrangement and reserve calculation.Through verifying by several drilled wells,it was shown that the reservoir prediction and evaluation results are reliable,thus providing a reliable basis for the well pattern arrangement and reserve calculation.
Because the carbonate karst reservoirs in Talimu Basin are of the characters as great burial depth,strong heterogeneity,etc.,it is very difficult to predict relatively accurately the karst reservoirs by one single technique.In the paper,the seismic response characteristics of the carbonate karst reservoir development and distribution are analyzed deepgoingly;then,through karst reservoir prediction by use of the seismic attribution parameter analysis,paleogeomorphological restoration,strain quantity analysis fracture prediction,well-restrained full 3-D wave impedance inversion techniques,it was considered that the carbonate karst development zones include the areas with low coherence,strong amplitude and relatively large amplitude lateral change rate in seismic attribution,the paleogeomorphological slope portion,the both sides of ancestral river and the high strain quantity and high fracture density areas;and then the comprehensive prediction and evaluation of carbonate karst reservoirs are carried out by applying the multiparameter fusion of above mentioned attribution parameters and the favourable and relatively favourable carbonate karst development zones are divided up for well pattern arrangement and reserve calculation.Through verifying by several drilled wells,it was shown that the reservoir prediction and evaluation results are reliable,thus providing a reliable basis for the well pattern arrangement and reserve calculation.
引文
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2 张旭光.利用地震信息检测碳酸盐岩溶洞.石油物探,2002;41(3):359～362
3 袁国芬.塔河油田碳酸盐岩储层地球物理响应特征.石油物探,2003;42(3):318～321
4 詹姆斯NP、肖凯PW著,胡文海、胡征钦等译.古岩溶.北京:石油工业出版社,1992
5 蒋忠诚,袁道先.表层岩溶带的岩溶动力学特征及其环境和资源意义.地球学报,1999;20(3)
6 邬长武,蒋春雷等.塔中16-24井区奥陶系碳酸盐岩古岩溶研究.矿物岩石,2002;22(2):69～73
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