摘要
黄河口凹陷渤南低凸起B油田沙二段埋深大(大于3 600 m),储层物性普遍较差,给测井解释及油气成藏研究带来了难度。为判识致密储层含油气性,恢复沙二段油气充注史,利用颗粒荧光定量分析(QGF)及颗粒萃取液荧光定量分析(QGF-E)技术开展了详细研究。结果表明,B油田B2井沙二段QGF-Index及QGF-E因储层物性差异性明显,且现今油水界面之下存在古油层和残余油层。结合成藏条件分析认为,沙二段致密储层的油气充注过程可分为三类:排烃高峰期充分充注型、排烃高峰期欠充注型、未充注型,B2井含油气层为"早晚油气充注型",而测井解释"干层"大部分为"早油气充注型"或"未充注型"。颗粒荧光定量分析技术可在致密储层中有效判识含油气层段。
The reservoirs at Sha2 Member of Bozhong 27-2 Oilfield is buried deeply（over 3 600 m） in Bonan lower-uplift of Huanghekou Depression,with very poor reservoir physical properties,which bring difficulty to interpretation of logging data and study of hydrocarbon accumulation.In order to identify reservoir hydrocarbon bearing conditions and restore the hydrocarbon filling history of Sha2 Member,a detailed study has been carried out with the technology of quantitative grain fluorescence analysis（QGF） and technology of quantitative grain fluorescence analysis of extracted fluid（QGF-E）.The results show that QGF-Index and QGF-E of Sha2 member has obvious difference due to the difference in reservoir physical property.There is a palaeo-oil zone and a residual oil layer below the present oil-water contact.Combined with the analysis of hydrocarbon accumulation conditions,it is believed that hydrocarbon charging process of the tight reservoir of Sha2 member can be divided into three types,sufficient hydrocarbon charging type at hydrocarbon expulsion peak,not sufficient hydrocarbon charging type at hydrocarbon expulsion peak,and no charging type.The charging type at hydrocarbon bearing layer in B2 well belongs to early and late hydrocarbon charging type,while the dry layer from interpretation of logging data belongs to early hydrocarbon charging type or no charging type.The technique of quantitative grain fluorescence analysis can be used to identify hydrocarbon bearing layers in tight reservoir.
出处
《海洋石油》
CAS
2017年第1期64-68,共5页
Offshore Oil
关键词
定量颗粒荧光
古油层
充注史
渤南低凸起
Quantitative grain fluorescence
palaeo-oil zone
hydrocarbon charging history
Bonan lower-uplift
