摘要
储层的非均质性影响着剩余油的分布和规模,因此针对海子塌油区现有的勘探现状,结合该区实际地质情况,利用测井解释、岩心以及分析化验资料,对海子塌油区长6油层组非均质性进行探讨,分析海子塌地区岩性、物性、电性等特征,对比海子塌油区长6油层组的层内、层间、平面及微观4个方面的非均质性。结果表明:海子塌地区层内非均质性较强,主要受到沉积构造、岩石韵律、层内夹层和渗透率非均质性等因素的控制;层间非均质性整体较强,各个小层受到隔层、渗漏率和砂地比等因素的影响,非均质性差异明显,其中以长6~1和长6~2的非均质性较强;平面非均质性主要受到沉积相及砂体展布的影响;微观非均质性比较复杂,各种成岩作用互相影响,加剧了海子塌长6油层组的非均质性。
Reservoir heterogeneity affects the distribution and scale of remaining oil.Based on this viewpoint,accordedto the practical geological situation,utilized logging data and core analysis data,combined with the explorationprocess of Haizita block of Ordos basin,this article studied on the reservoir heterogeneity of Chang-6reservoir ofYanchang formation in Haizita area.By analyzing the character lithology,physical property and electrical property,the paper discussed and contrasted the heterogeneity into four content which concludes intra-layer,inter-layers,plane and microscopic of Chang-6reservoir in Haizita area.The results showed that the intra-layer heterogeneity is strong in the study area which is mainly controlled by sedimentary structure,rhythm,interlayer and permeability heterogeneity.Inter-layer heterogeneity is generally strong;each layer reflects obvious difference which affects by the factor of barrier bed,permeability and lithological property,meanwhile,the heterogeneity of the Chang61and Chang62are stronger than the others;the plane heterogeneity is mainly affected by sedimentary microfacies and the distribution of sand body;microscopic heterogeneity is complex,and various diagenesis heightened reservoir heterogeneity degree.
作者
宋健
何斌
王小多
杜彦军
高庭
张格
Song Jian;He Bin;Wang Xiaoduo;Du Yanjun;Gao Ting;Zhang Ge(Research Institute of Shaanxi Yanchang Petroleum.Co.,Ltd.,Xi'an,Shaanxi 710075,China;Zhidan Oil Production of Yanchang Oilfield Co., Ld .Yanan,Shaanxi 717500,China)
出处
《非常规油气》
2017年第6期80-87,99,共9页
Unconventional Oil & Gas
基金
国家自然科学基金"鄂尔多斯盆地延长组连续型岩性油藏成藏机理与地质特征"(41102083)资助
