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采用伊兰—依通地堑东北端的汤原断陷汤参1井和汤参2井第三系泥质烃源岩的实际资料,应用排烃门限理论,研究其排油气特征,在此基础上建立了其排烃门限判别理论图版和排烃量定量评价理论图版。研究表明,C(母质丰度)值高但KTI(母质类型指数)值低的烃源岩与C值低但KTI值高的烃源岩均能进入排烃门限;烃源岩进入排烃门限的深度随C、KTI、Ro值的增大而减小,进入排烃门限后的排烃量随C、KTI、Ro值的增大而增大,C、KTI、Ro三者互补。一般而言,烃源岩进入排甲烷气门限早于进入排重烃气门限,进入排重烃气门限早于进入排油门限。评价结论是:汤参1井、汤参2井第三系泥质烃源岩属于非烃源岩到差烃源岩,大部分已进入排甲烷气和重烃气阶段,只有少数进入排油阶段。图2表5参2(周海燕摘)
Based on the actual data of the Tertiary muddy source rocks in the Tangyuan fault depression of Tangyuan fault and the Tertiary muddy source rocks in the northeastern tip of the Yilan-Yitong Grabenage, the characteristics of oil and gas emissions are studied based on the theory of hydrocarbon expulsion threshold. Based on this, On the establishment of its hydrocarbon extinction threshold theory plate and the amount of hydrocarbon discharge quantitative evaluation theory plate. The results show that hydrocarbon source rocks with high C (parent material abundance) but low KTI (parent type index) can enter the hydrocarbon expulsion threshold with low C values but with high KTI values. Source rocks enter the hydrocarbon expulsion threshold KTI and Ro decrease with the increase of C, KTI and Ro, and the amount of hydrocarbon expulsion after entering the hydrocarbon expulsion threshold increases with the increase of C, KTI and Ro, while C, KTI and Ro complement each other. In general, hydrocarbon source rocks enter the methane methane threshold earlier than the incoming hydrocarbon threshold, and the incoming hydrocarbon threshold is earlier than the threshold. The evaluation concluded that the Tertiary muddy source rocks in Tangshen 1 well and Tangshen 2 well belong to non-source rocks to poor source rocks, and most of them have entered the stage of methane and heavy hydrocarbon gas. Only a few of them enter the oil discharge stage. Figure 2 Table 5 reference 2 (Zhou Haiyan pick)