黑46断块低渗油藏非均质性研究及其对剩余油分布的影响  

HETEROGENEITY AND IITS IMPACT ON REMAINING OIL DDISTRIBUTION OF LOW PERMEABILITY RESERVOIRS IN THE HEI46 BLOCK

作　　者：孟宁宁[1] 刘怀山[1] 张金亮[2] 谢俊[3] 袁勇[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]北京师范大学资源学院,北京100875 [3]山东科技大学地球科学与工程学院,青岛266590

出　　处：《海洋地质与第四纪地质》2016年第1期143-150,共8页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(41172109);山东省自然科学基金项目(ZR2011DM009)

摘　　要：低渗油藏是油田勘探开发过程中难度最大的油藏类型之一,黑46断块为低孔特低渗碎屑岩储层,储层物性差、采出程度低、综合含水高、非均质性强,因此开发难度较大。针对黑46地区复杂油藏特征,以岩心观察、室内分析实验结果和测井解释资料为基础,对青一段储层层内、层间和平面非均质性进行研究,并对不同沉积相带的非均质性进行分析,明确其对研究区剩余油分布规律的影响。黑46断块青一段严重非均质性储层因注入水推进不均匀,易导致剩余油富集;单一反韵律砂体油层中上部岩性粒度粗,渗透率高,吸水指数大,动用程度高;通过数值模拟结果验证,注入水沿高渗透率突进,致使渗透率较差的区域成为剩余油分布集中地带。该研究结果与油田试油结果对比吻合较好,对下一步油气勘探与后期注水开发具有重要的指导意义。Low-permeability reservoir is one of the reservoirs with the most difficult decisions during the oil and gas exploration.Hei46 block in Songliao Basin is difficult for exploitation due to poor physical property and low recovery degree,high moisture content of reservoir as well as strong heterogeneity.Reservoir heterogeneity in the first member of Qingshankou Formation including intralayer,interlayer and plane heterogeneity are studied on the basis of core observation,laboratory experiments and logging interpretation.The article links heterogeneity in different depositional facies,and determines the effects of heterogeneity on remaining oil distribution can be determined.Under the influence of reverse rhythm,the upper parts of oil-bearing layers show coarse lithology,as well as higher permeability,water injectivity index and producing degree.Combining with numerical simulation results,we hold that water flows primarily along high permeability zones causing remaining oil enrichment in low permeability regions.Results of the heterogeneity study can be correlated well with the field testing resultsand thus have significant implications for the further petroleum exploration and water-injection exploitation.

关 键 词：非均质性 剩余油分布 沉积微相 低渗油藏 黑46断块 松辽盆地 

分 类 号：P744.4[天文地球—海洋科学]