苏桥地区残殖煤的发现——兼论煤成气、煤成油的判别和我国煤成油的前景

THE DISCOVERY OF LIPITOBIOLITES IN SUQIA REGION——ON THE DETERMINATION OF COAL-GENERATING GASES AND COALGENERATING OILS AND THEIR PROSPECTS

苏桥位于我国著名的河北省任丘古潜山油田东北，靠近西面大城凸起的文安斜坡带上。本区第三纪生油岩由西部坝县凹陷向东变薄并超覆在中生界和石炭-二叠系之上，生油层厚度薄、有机质丰度低、埋藏浅，生油条件差。斜坡带第三系仅找到少量油藏。

Based on the fluorescent microscopic study, organic compositional analysis and si-mulating experiments of core samples and cuttings in the Suqia region, it is found that Carboniferous-Permian coal-bearing formations have substrata rich in spores, cuticles, resins and bark. These substrata have high potential for hydrocarbons, with S1+S2 high up to about 200, high productivity of liquid hydrocarbons (73.5 mg/g or more) and high productivity of natural gases (up to 194ml/g). The substrata are thought to be an important source for natural gases and condensates found in this region.According to biomarker compounds and carbon and hydrogen isotope data from the Suqia natural gas-condensate field, coal and its simulating products, characteristics of coal-generating gases and coal-generating oils from a special kind of coal and their cor-relation methods are discussed in the paper.In terms of the geochemical formation conditions the distribution regularities of paralic coal rich in hydrogen, the commercial prospects of Carboniferous-Permian coal-generating oils have been evaluated as well.