CAJ | 학술논문

库车坳陷大北-克拉苏构造带天然气经历过深埋高温作用，为了判定盐下天然气的母质类型和成因类型，根据镜质体反射率的计算公式和金刚烷与成熟度的关系计算成熟度；依据Behar关系图谱和碳同位素值图谱识别裂解气类型。通过地球化学数据最终计算出Ro达到1.5以上，达到裂解气的形成条件；裂解气类型为干酪根裂解气。并且进一步证实干酪根类型为自由型干酪根，与黏土矿物的催化关系不密切；从干酪根的聚集类型可证实为聚集型干酪根而非可溶有机质。综合分析得出大北-克拉苏构造带盐下天然气为腐殖型+依附型+聚集型干酪根裂解气。
고차요함대북-극랍소구조대천연기경력과심매고온작용，위료판정염하천연기적모질류형화성인류형，근거경질체반사솔적계산공식화금강완여성숙도적관계계산성숙도；의거Behar관계도보화탄동위소치도보식별렬해기류형。통과지구화학수거최종계산출Ro체도1.5이상，체도렬해기적형성조건；렬해기류형위간락근렬해기。병차진일보증실간락근류형위자유형간락근，여점토광물적최화관계불밀절；종간락근적취집류형가증실위취집형간락근이비가용유궤질。종합분석득출대북-극랍소구조대염하천연기위부식형+의부형+취집형간락근렬해기。
The natural gas in Dabei - Kelasu tectonic belt of Kuche Depression has gone through deep buried and high temperature. In order to distinguish the genetic and parent material type of natural gas under evaporite bed,the maturity was calculated by the calculation formula of vitrinite reflectance and the relationship between adamantane and maturity. The cracked gas type was identified according to Behar relationship maps and carbon isotope values. Finally,by analyzing the geochemical data,the calculated Ro was above 1. 5,which reaches the formation conditions of the cracked gas. So the cracked gas type belonged to free type kerogen related to clay mineral catalysis. The aggregate type of kerogen was organic carbon instead of soluble organic matter. Comprehensive analysis showed that the nature gas under the evaporate bed of Da-bei - Kelasu tectonic belt is humus,free,and gathered kerogen pyrolysis gas.