CAJ | 학술논문

利用地层孔隙异常压力热模拟实验分别对硅质型、钙质型与粘土型优质烃源岩进行分析,生排油气模拟结果表明:(1)成熟早中期硅质型优质烃源岩排油量与排油效率最高,早期主要以重质油排出为主,排油效率高达50%左右;钙质型优质烃源岩次之,排烃效率一般在30%左右;粘土型优质烃源岩排油效率一般只有4%~11%.(2)在成熟中晚期,硅质型优质烃源岩排油效率最高,但是钙质型烃源岩增加迅速达65%,粘土型烃源岩增加不明显.(3)成熟晚期—高成熟阶段,硅质型和钙质型优质烃源岩排油效率变化不明显,而粘土型烃源岩排油效率则从20%迅速增加到90%.硅质型、钙质型和粘土型优质烃源岩生排油气模式之间最大的差异是它们在成熟早中期排油效率和排油量不同.
이용지층공극이상압력열모의실험분별대규질형、개질형여점토형우질경원암진행분석,생배유기모의결과표명:(1)성숙조중기규질형우질경원암배유량여배유효솔최고,조기주요이중질유배출위주,배유효솔고체50%좌우;개질형우질경원암차지,배경효솔일반재30%좌우;점토형우질경원암배유효솔일반지유4%~11%.(2)재성숙중만기,규질형우질경원암배유효솔최고,단시개질형경원암증가신속체65%,점토형경원암증가불명현.(3)성숙만기—고성숙계단,규질형화개질형우질경원암배유효솔변화불명현,이점토형경원암배유효솔칙종20%신속증가도90%.규질형、개질형화점토형우질경원암생배유기모식지간최대적차이시타문재성숙조중기배유효솔화배유량불동.
Semi-closed pyrolysis experiments were conducted in order to evaluate what controls the hydrocarbon generation and expulsion efficiency for three types of excellent source rocks ( siliceous, calcareous and clay ones). Each type of source rock has different relative hydrocarbon expulsion efficiencies in the stage of early-middle oil window, where siliceous source rock has the highest oil expulsion efficiency and oil expulsion quanti-ty, reaching to 50% , and the expelled products are dominated by heavy oil. This is followed by calcareous source rock, about 30% . The oil expulsion efficiency of clay source rock is the lowest, about 4% -11% . During the middle-late maturation stage, siliceous source rock tends to achieve the highest expulsion efficiency first, fol-lowed by calcareous source rock (65% ) and then clay source rock. During the late and high-mature stage, the oil expulsion efficiencies of siliceous and calcareous source rocks do not change obviously, while the oil expulsion efficiency of clay source rock increases rapidly from 20% to 90% . The models of hydrocarbon generation and ex-pulsion of three types of excellent source rocks are different in the stage of early-middle oil window.