摘要
春光油田春17区白垩系主要为特、超稠油油藏,油层具有埋藏深、厚度薄、岩性复杂、识别难度大的特征。根据春光油田以往的电性识别标准难以有效地刻画油层的厚度,主要原因是该区储集层中钙质砂岩极为发育,胶结致密,电阻率较油层高(最高达6Ω·m),仅仅利用电阻率大小识别油层与地下实际情况存在较大差异。为此,根据钻井取心以及岩样分析结果,利用岩性、物性、电性及含油性,结合试采情况,建立了油层识别图版,利用该图版能够较好地判断油层、干层和水层。
Chun-17 block of Chunguang oilfield is mainly of super heavy oil reservoir and has the characteristics of deep buried depth,thin thickness,complex lithology,and it is difficult to be identified.According to the old electrical recognition criteria of Chunguang oilfield,it is difficult to effectively depict the thickness of oil layer,and the main reasons are very developed calcareous sandstone,dense cementation and high resistivity reservoir.The highest resistivity can be high up to6Ω·m.However,only with the use of the resistivity to identify reservoir,there may exists big difference with the the actual situation of underground.Therefore,according to the results of drilling coring and sample analysis,by using the lithology,physical property,electric property and lubricity,combining with the exploration situation,the reservoir identification chart has been established.The chart can better determine oil layer,dry layer and water layer.
出处
《石油地质与工程》
CAS
2015年第6期98-99,102,共3页
Petroleum Geology and Engineering
关键词
春光油田17区
白垩系
钙质砂岩
油层识别
17-Block of Chunguang oilfield
Creta-ceous
Calcareous sandstone
reservoir identification
fourproperty relationship
