琼东南盆地崖13-1气田气源区圈定与成藏运聚模式  

Source area determination and gas pool formation model of the Ya13-1 Gasfield from the Qiongdongnan Basin

作　　者：胡忠良 [1] 肖贤明 [1] 黄保家 [2] Tang Yongchun  

机构地区：[1]中国科学院,广州地球化学研究所,有机地球化学国家重点实验室,广东,广州,510640 [2]中国海洋石油总公司,湛江分公司技术部,广东,湛江,524057 [3]Power,Energy and Environmental Research Center,California Institute of Technology,CA,91722,USA

出　　处：《地球化学》2005年第1期66-72,共7页Geochimica

基　　金：中国科学院知识创新工程领域前沿项目(GIGCX-04-08);中国科学院广州地球化学研究所有机地球化学国家重点实验室开放基金(OGL200302)~~

摘　　要：琼东南盆地崖13-1气田成藏运聚模式一直存在不同的认识。应用生烃动力学、碳同位素动力学及流体包裹体方法对该气田有效气源区、气藏充注时间和运聚效率等进行了研究。结果表明,崖13-1气藏成藏时间较晚,天然气主成藏期出现在2Ma以后;有效气源区是崖南凹陷斜坡带崖城组,现埋深范围4000～5500m;天然气为累积聚集气,目前天然气仍在有效的充注阶段。在此基础上,提出了崖13-1气田天然气成藏运聚模式。此研究方法及建立起的成藏模式对于莺-琼盆地天然气勘探具有重要指导意义。There are some key problems which have been not well solved for th e formation model of the Ya13-1 Gasfield from the Qiongdongnan Basin. In this pap er, the methods of hydrocarbon generation and carbon isotopic fraction kinetics of source rocks as well as fluid inclusion techniques of reservoirs were applied to investigate the effective source area, the timing of the gas pool formation, and gas migration and accumulation efficiency. The results show that the Ya13-1 Gasfield formed quite late, with a main stage of gas pool formation after 2 Ma , and the effective gas source rocks are coal measure mudstone and coal in the Y acheng Formation located at the slope area of the Yanan Depression, with a curre nt burial depth of 4 000～5 500 m, and that the gases from the gasfield are char acterised by cumulated gases. On the basis of these, a model showing gas generat ion, migration and accumulation for the Ya13-1 Gasfield is suggested. It is bel ieved that the methods and the model suggested in this paper have an important g uidance to further research and exploration of the natural gases from the Yingge hai-Qiongdongnan Basin.

关 键 词：崖13-1气田 有效气源区 碳同位素 生烃动力学 成藏运聚模式 琼东南盆地 

分 类 号：P593[天文地球—地球化学]