地球化学
地毬化學
지구화학
GEOCHIMICA
2015年
1期
79-86
,共8页
颜永何%邹艳荣%屈振亚%蔡玉兰%魏志福%彭平安
顏永何%鄒豔榮%屈振亞%蔡玉蘭%魏誌福%彭平安
안영하%추염영%굴진아%채옥란%위지복%팽평안
溶胀%留烃量%排烃史%东营凹陷
溶脹%留烴量%排烴史%東營凹陷
용창%류경량%배경사%동영요함
solvent swelling%hydrocarbon retention%expulsion history%Dongying Depression
东营凹陷沙四段是渤海湾盆地优质烃源岩层，具有丰富的油气资源。选取沙四段烃源岩，运用IH-Tmax 图，进行了演化趋势分析。采用溶胀实验对烃源岩的留烃能力进行模拟研究，结合该地区的生烃特征和生烃过程，对沙四段留-排烃史进行了恢复。部分样品是由同一生烃母质演化而来的，而且随着成熟度不断增加，可以视为一自然演化剖面。留烃量模拟显示，随着成熟度的增加，溶胀比下降，留烃量随之降低，其中未成熟样品留烃能力最强。液态烃中各组分的留烃量也不同，饱和烃留烃量最低，最容易从烃源岩中排出，而NSOs留烃量最大。将留烃史与盆地生烃史结合，得到东营凹陷沙四段的整个留-排烃过程。建立了自然演化系列样品留烃量的实验与评价方法。
東營凹陷沙四段是渤海灣盆地優質烴源巖層，具有豐富的油氣資源。選取沙四段烴源巖，運用IH-Tmax 圖，進行瞭縯化趨勢分析。採用溶脹實驗對烴源巖的留烴能力進行模擬研究，結閤該地區的生烴特徵和生烴過程，對沙四段留-排烴史進行瞭恢複。部分樣品是由同一生烴母質縯化而來的，而且隨著成熟度不斷增加，可以視為一自然縯化剖麵。留烴量模擬顯示，隨著成熟度的增加，溶脹比下降，留烴量隨之降低，其中未成熟樣品留烴能力最彊。液態烴中各組分的留烴量也不同，飽和烴留烴量最低，最容易從烴源巖中排齣，而NSOs留烴量最大。將留烴史與盆地生烴史結閤，得到東營凹陷沙四段的整箇留-排烴過程。建立瞭自然縯化繫列樣品留烴量的實驗與評價方法。
동영요함사사단시발해만분지우질경원암층，구유봉부적유기자원。선취사사단경원암，운용IH-Tmax 도，진행료연화추세분석。채용용창실험대경원암적류경능력진행모의연구，결합해지구적생경특정화생경과정，대사사단류-배경사진행료회복。부분양품시유동일생경모질연화이래적，이차수착성숙도불단증가，가이시위일자연연화부면。류경량모의현시，수착성숙도적증가，용창비하강，류경량수지강저，기중미성숙양품류경능력최강。액태경중각조분적류경량야불동，포화경류경량최저，최용역종경원암중배출，이NSOs류경량최대。장류경사여분지생경사결합，득도동영요함사사단적정개류-배경과정。건립료자연연화계렬양품류경량적실험여평개방법。
A large amount of oil has been generated from the excellent source rock of the Es4 formation in the Dongying Depression, Bohai Bay Basin. The evolving trend of the source rock is analyzed by using the IH vs. Tmax plot. Combining the simulation of the hydrocarbon retention potential, which is acquired by the solvent swelling experiment, with the hydrocarbon generation characteristics and process of this area, the retention and expulsion history of the Es4 formation are restored. With increasing maturity, some samples evolved from the same hydrocarbon-generated parent material can be regarded as a natural profile. The results of the retention simulation show that the volumetric swelling ratio and the amount of retention are decreasing with the increasing maturity, and that the immaturity sample has the largest retention hydrocarbon potential. The group-type fractions of the liquid hydrocarbon which retained in the source are not the same, saturates have the minimum hydrocarbon retention and it means that saturates are most easily expulsed from the source rocks. However, the NSOs (resins and asphaltenes) have the largest retention hydrocarbon potential. Combining the hydrocarbon retention history with the generation history of the basin, the whole retention-expulsion process of the Dongying Depression can be obtained. Therefore, the hydrocarbon retention experiment and evaluation method for the natural profile samples are established.
