INFLUENCE OF THE DIAGENESIS OF CLAY MINERALS ON RESERVOIRS AND PRODUCTIVITY-A CASE STUDY ON THE FU-3 RESERVOIRS OF TAIXIN oil field, THE NORTH JIANGSU BASIN
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摘要: 该文基于12口井的粘土矿物X-衍射、岩心铸体的测试数据及电镜扫描微观图象观察,对台兴油田阜三段4个油组储层的粘土矿物类型及分布特征进行了研究,阐述了粘土矿物类型与储层面孔率及孔喉结构的关系,分析了粘土矿物转化与孔隙演化的规律、粘土矿物产状对储集性的影响,同时对开发中粘土矿物成分对油层和产能的影响进行了分析。研究结果表明高岭石含量与孔隙度成正相关关系,绿泥石、伊利石的含量与孔隙度成负相关关系,尤其是绿泥石对孔隙度的负面影响较大,次生孔隙发育带基本相当于粘土矿物第一迅速转化带,其埋深为2350～2750m。最后对本区有利于次生孔隙发育的层位进行了预测。Abstract: On basis of X ray diffraction of clay minerals,analysis of resin cast thin sections of cores and SEM observation of samples in twelve wells,the clay mineral types and their distribution in four oil groups of the third member of Fuling Group in Taixin oil field,the northern Jiangsu Basin were described.The relationship between clay mineral types and porosity or pore structure of reservoirs was discussed.The inf luence of transform of clay minerals with geological evolution on reservoir character was analyzed.The results showed that kaolinite was positive correlation with porosity,but chlorite and illite were negative correlation with that.The chlorite showed obvious negative influence on preservation of porosity.Occurrence of secondary pores was accordance with the first rapid transform zonation of clay minerals in burial depth of 2 350-2 750m.The most favourable position for development of secondary pores was forecasted.
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Key words:
- productivity /
- reservoir /
- diagenesis /
- clay mineral /
- Taixin oil field /
- the northern Jiangsu Basin
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