CAJ | 학술논문

绥滨坳陷是位于三江盆地西部的次一级构造单元，并且作为中国东北部地区唯一的中生界具有海相和海陆交互相沉积的、未获得常规油气突破的坳陷，对其进行非常规油气地质研究显得意义重大。其中中生界下白垩统穆棱组和城子河组的陆相富有机质含煤泥页岩是该地区最重要的两套主力烃源岩层系。通过分析绥滨坳陷下白垩统暗色泥页岩的分布情况、地球化学指标、页岩储层及含气性特征等因素，认为下白垩统两套富有机质泥页岩的分布面积较广泛（＞2000 km2）、累积厚度大（＞1000 m）、TOC含量高（＞1.3％）、受局部火山活动的影响，成熟度以成熟—过成熟为主（平均1.19％），有机质类型以Ⅲ和Ⅱ2为主，有利于生气，且储层中石英、长石及碳酸盐等脆性矿物含量较高，易于后期压裂改造的实施。另外，多段泥页岩层段气测显示异常，表明了其良好的页岩气勘探潜力。并与美国和国内海、陆相产气页岩层的主要参数指标相比较，初步认为普阳—南大林子凹陷的北部及南部的东荣集贤一带为页岩气勘探的有利地区且以城子河组为最有利层段，而穆棱组次之，页岩油气资源潜力巨大。
수빈요함시위우삼강분지서부적차일급구조단원，병차작위중국동북부지구유일적중생계구유해상화해륙교호상침적적、미획득상규유기돌파적요함，대기진행비상규유기지질연구현득의의중대。기중중생계하백성통목릉조화성자하조적륙상부유궤질함매니혈암시해지구최중요적량투주력경원암층계。통과분석수빈요함하백성통암색니혈암적분포정황、지구화학지표、혈암저층급함기성특정등인소，인위하백성통량투부유궤질니혈암적분포면적교엄범（＞2000 km2）、루적후도대（＞1000 m）、TOC함량고（＞1.3％）、수국부화산활동적영향，성숙도이성숙—과성숙위주（평균1.19％），유궤질류형이Ⅲ화Ⅱ2위주，유리우생기，차저층중석영、장석급탄산염등취성광물함량교고，역우후기압렬개조적실시。령외，다단니혈암층단기측현시이상，표명료기량호적혈암기감탐잠력。병여미국화국내해、륙상산기혈암층적주요삼수지표상비교，초보인위보양—남대림자요함적북부급남부적동영집현일대위혈암기감탐적유리지구차이성자하조위최유리층단，이목릉조차지，혈암유기자원잠력거대。
Suibin depression is one of secondary tectonic units in the western Sanjiang Basin.As an unique sedimentary basin in Mesozoic,which developed marine and marine-continental transitional formations in the northeast China,conventional oil-gas breakthrough has not been made.So the study of unconventional oil-gas geology is of great importance.The Chengzihe-Muleng coal-bearing formation organic-rich shale in the Lower Cretaceous,the Mesozoic,are the main source rock in these areas.By analysis of the distribution,geochemical indicators,reservoir characteristics and gas-bearing of the Lower Cretaceous shale in Suibin depression,the re-sults indicate that the Lower Cretaceous dark shale is broadly distributed (>2,000 km2)and extents widely in large thickness (>1 ,000 m)with a high TOC content (>1.3%),a high thermal maturation (1.19%)influ-enced by the local volcanic activity,and typeⅡ2 -Ⅲ kerogens.The shale reservoir has high brittle mineral content with a large proportion of the quartz and feldspar content,which indicates that the shale can be well fractured.Additionally,the abnormal responses of gas-bearing shale on well logging also indicate that it is qual-ified for the geological conditions to accumulate shale gas.Compared with the main parameters of North Ameri-can marine and China marine or lacustrine shale,the favorable area of shale gas exploration in Suibin depression is located in the northern of Puyang-Nandalinzi sag and the southern of Jixian-Dongrong.And Chengzihe Forma-tion shale may be the most favorable layers for shale gas exploration,followed by Muleng Formation shale,with a huge resource potential of shale gas.