CAJ | 학술논문

济阳坳陷岩性油气藏成功勘探表明，岩性油气藏受“相”和“界面势能”的双重控制。相控油气作用表现为高孔渗优相控藏，势控油气作用表现为低界面势能控藏，只有优相和低界面势能耦合区才能形成岩性油气藏。通过对沾化凹陷埕913、牛庄洼陷牛35-牛20-王70等典型岩性油气藏解剖表明，只有相-势耦合控藏指数（ FPI）大于0．5，岩性圈闭才能聚集油气成藏，成藏临界条件呈现为“双低”或“双高”的标准，即优相指数（FI）低、界面势能指数（PIS）低，或优相指数（FI）高、界面势能指数（PIS）高。一般FPI越大，圈闭含油饱和度也越高，越有利于油气聚集成藏。根据济阳坳陷73个岩性圈闭和54个浊积砂岩透镜体岩性圈闭含油气性的统计及其相势特征的分析，分别建立了2类岩性圈闭的含油饱和度（ So ）与FPI定量关系模型，利用该模型预测了东营凹陷13个岩性圈闭的含油饱和度，预测偏差率小于20％的准确率达84．6％，应用效果较好，可以用于岩性圈闭含油饱和度的预测。
제양요함암성유기장성공감탐표명，암성유기장수“상”화“계면세능”적쌍중공제。상공유기작용표현위고공삼우상공장，세공유기작용표현위저계면세능공장，지유우상화저계면세능우합구재능형성암성유기장。통과대첨화요함정913、우장와함우35-우20-왕70등전형암성유기장해부표명，지유상-세우합공장지수（ FPI）대우0．5，암성권폐재능취집유기성장，성장림계조건정현위“쌍저”혹“쌍고”적표준，즉우상지수（FI）저、계면세능지수（PIS）저，혹우상지수（FI）고、계면세능지수（PIS）고。일반FPI월대，권폐함유포화도야월고，월유리우유기취집성장。근거제양요함73개암성권폐화54개탁적사암투경체암성권폐함유기성적통계급기상세특정적분석，분별건립료2류암성권폐적함유포화도（ So ）여FPI정량관계모형，이용해모형예측료동영요함13개암성권폐적함유포화도，예측편차솔소우20％적준학솔체84．6％，응용효과교호，가이용우암성권폐함유포화도적예측。
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.