石油实验地质Issue(5)：574-582,588,10.DOI:10.11781/sysydz201405574
济阳坳陷典型岩性油气藏相-势耦合控藏作用解剖及应用
Anatomy and application of facies-potential coupling on hydrocarbon accumulation in typical lithologic reservoirs in Jiyang Depression
摘要
Abstract
Oil and gas exploration in the Jiyang Depression showed that lithologic reservoirs were mainly controlled by facies and interfacial potential. As to the facies-controlled effect, the favorable facies with high porosity and high permeability controlled hydrocarbon accumulation. And for the potential-controlled effect, low interfacial potential controlled hydrocarbon accumulation. Only in the coupling region of favorable facies and low interfacial potential, could lithologic reservoirs form. Through typical cases studies of the lithologic reservoirs of the Cheng913 in the Zhanhua Sag and the Niu35-Niu20-Wang70 in the Niuzhuang Sag, results showed that only when the facies-po-tential coupling index(FPI) was larger than 0.5, could hydrocarbons accumulate in lithologic traps. Besides, the critical condition for hydrocarbon accumulation displayed the characteristics of Two Lows or Two Highs, that was, low or high facies index (FI) and interfacial potential index (PIS). The larger the FPI was, the higher the oil sat-uration was, and the easier it was for hydrocarbons to accumulate. Based on the statistics of petroliferous property and the analysis of facies, the potential characteristics of 73 lithologic traps and 54 turbidite lens traps in the Jiyang Depression were concluded, and the quantitative models of the relationship between oil saturation and FPI for two categories of traps were established. Oil saturation of 13 lithologic traps in the Dongying Sag was predicted through this model, and it achieved the accuracy rate of 84.6%for the reservoirs with the deviation rate less than 20%. As a result, this model could be applicable in predicting the oil saturation of lithologic reservoirs.关键词
相-势耦合/岩性油气藏/埕913油气藏/牛35-牛20-王70油气藏/含油饱和度/济阳坳陷Key words
facies-potential coupling/lithologic reservoirs/Cheng913 reservoir/Niu35-Niu20-Wang70 reser-voirs/oil saturation/Jiyang Depression分类
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霍志鹏,庞雄奇,范凯,陈冬霞,张俊..济阳坳陷典型岩性油气藏相-势耦合控藏作用解剖及应用[J].石油实验地质,2014,(5):574-582,588,10.基金项目
国家重点基础研究发展计划（973计划）（2006CB202308，2011CB201102）资助。 （）
