CAJ | 학술논문

冀中坳陷东北部石炭二叠系煤系地层生、储、盖组合条件完备，上古生界自生自储煤成气藏勘探潜力巨大。笔者基于该层系“油井少、空井多”的勘探现实，通过烃源岩热解数据分析和热模拟实验工作，评价区内烃源岩的生烃潜力，以期减少勘探风险。数据分析表明，w（TOC）为10％和40％是区内煤系暗色泥岩、炭质泥岩和煤岩的有效划分界限。区内石炭二叠系煤系烃源岩主要以 III 型干酪根为主，为中等较差的油源岩和较好的气源岩。分别受岩浆热变质和深成变质作用影响，区内存在武清凹陷、苏4苏8苏23文古4和葛8大参1三个成熟度高值区，即生油气中心。结合热模拟实验结果，采用体积法算得该区石炭二叠系地层生气总量约为4万亿 m3。
기중요함동북부석탄이첩계매계지층생、저、개조합조건완비，상고생계자생자저매성기장감탐잠력거대。필자기우해층계“유정소、공정다”적감탐현실，통과경원암열해수거분석화열모의실험공작，평개구내경원암적생경잠력，이기감소감탐풍험。수거분석표명，w（TOC）위10％화40％시구내매계암색니암、탄질니암화매암적유효화분계한。구내석탄이첩계매계경원암주요이 III 형간락근위주，위중등교차적유원암화교호적기원암。분별수암장열변질화심성변질작용영향，구내존재무청요함、소4소8소23문고4화갈8대삼1삼개성숙도고치구，즉생유기중심。결합열모의실험결과，채용체적법산득해구석탄이첩계지층생기총량약위4만억 m3。
Carboniferous‐Permian coal measures strata possess the conditions of a good source‐reservoir‐seal assemblage and thus a huge exploration potential of the self‐generation and self‐storage coal gas in the Upper Paleozoic strata in the northeast of Jizhong depression . However , the reality demonstrates only a few successful wells but a lot of empty ones in the historic exploration . We evaluated the hydrocarbon potential of source rock based on the pyrolysis data analysis and thermal simulation experiment to reduce the exploration risk in this strata .The results show that the contents of TOC (10% and 40% ) is the effective demarcation of dark mudstone ,carbon mudstone and coal .The source rock of Carboniferous‐Permian coal measures strata are of mainly type III kerogen ,and belong to poor‐medium oil source rock and good gas source rock .Affected by magmatic thermal metamorphism and plutonic metamorphism respectively ,the maturity of the three areas i .e .Wuqing depression ,Su4 Su8 Su23 Wengu4 ,and Ge8 Dacan1 are relatively high .As hydrocarbon generation centers ,their hydrocarbon generation amount is calculated for 4 trillion cubic square meters of gas .