CAJ | 학술논문

苏北盆地具有形成大型CO2气田的地质条件，黄桥CO2气田是目前我国陆地开发利用最大的CO2气田之一，它具有海相层系与陆相层系共同成藏、深层气藏和浅层气藏互相沟通的特点。深层气藏以高纯度CO2为主，浅层气藏以含N2为主，并含有高浓度的He。浅层气藏是深层气藏衍生的产物。CO2气藏圈闭于由海相中CO2古生界层系组成的大型背斜中，海相碳酸盐岩(包括部分碎屑岩)裂隙发育、孔渗条件优越，是CO2成藏的重要储集岩。CO2气藏之上有巨厚陆相中、新生界，是气藏良好的区域盖层。不同气藏气体组分有明显变化，但所有气藏组分及其同位素特征表明CO2气藏基本为岩浆一地幔来源。根据这一成因模式，黄桥地区有可观的CO2远景储量可供勘探。
소북분지구유형성대형CO2기전적지질조건，황교CO2기전시목전아국륙지개발이용최대적CO2기전지일，타구유해상층계여륙상층계공동성장、심층기장화천층기장호상구통적특점。심층기장이고순도CO2위주，천층기장이함N2위주，병함유고농도적He。천층기장시심층기장연생적산물。CO2기장권폐우유해상중CO2고생계층계조성적대형배사중，해상탄산염암(포괄부분쇄설암)렬극발육、공삼조건우월，시CO2성장적중요저집암。CO2기장지상유거후륙상중、신생계，시기장량호적구역개층。불동기장기체조분유명현변화，단소유기장조분급기동위소특정표명CO2기장기본위암장일지만래원。근거저일성인모식，황교지구유가관적CO2원경저량가공감탐。
Subei Basin is of the geological conditions of forming large-sized carbon dioxide gas fields. Huangqiao carbon dioxide gas field is one of the largest carbon dioxide gas fields developed and utilized in the land of our country at present, be ing of the properties that its reservoirs are composed of marine strata and continental strata and the deep-lying gas reservoir is interconnected with the shallow one. The former is mainly car bon dioxide and the latter nitrogen, containing high-concentra tion helium,therefore the latter is the product derived from the former. The carbon dioxide gas reservoirs are trapped in a large sized anticline being composed of marine strata of Mesozoic-Pa leczoic. The marine carbonate rocks(including a part of dastic rocks)are the major reservoir rocks of forming the carbon diox ide gas reservoirs because of their developed fractures and excel lent porosity and permeability conditions. The top of the carbon dioxide gas reservoirs is covered by Cenozoic-Mesozoic with a tremendous thickness which constitutes a regional cap formation over the gas reservoirs. Although the gas constituents in various gas reservoirs are obviously different from each other, all the constituents in various gas reservoirs and their isotope properties show that the gases in the reservoirs originated from magma mantle basically. According to such a genetic mode, considerable carbon dioxide gas prospective reserves may be provided for ex ploration in Huangqiao region.