塔里木盆地轮南地区油气成藏期次分析

1.中国石油勘探开发研究院,北京 100083; 2.塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000; 3.提高石油采收率国家重点实验室,北京 100083; 4.盆地构造与油气成藏重点实验室,北京 100083

塔里木盆地; 轮南地区; 成藏期次; 流体包裹体; 均一温度

Hydrocarbon accumulation periods in Lunnan Area of Tarim Basin
JIANG Lin1,3,4,BAO Dong-mei1,ZHOU Bo1,ZHANG Chun-lian2,ZHU Yong-feng2

(1.Research Institute of Petroleum Exploration & Development,CNPC,Beijing 100083,China; 2.Exploration and Development Research Institute of Tarim Oilfield Company,Korla 841000,China; 3.Key Laboratory of Basin Structure and Hydrocarbon Accumulation,CNPC,Beijing 100083,China; 4.State Key Laboratory of Enhanced Oil Recovery,CNPC,Beijing 100083,China)

Tarim Basin; Lunnan district; accumulation period; fluid inclusions; homogenization temperature

DOI: 10.13800/j.cnki.xakjdxxb.2015.0408

备注

塔里木盆地轮南地区多期构造运动对油气成藏产生了重要作用,认识油气藏的形成过程与分布规律需要准确厘定油气成藏期次。文中根据目前流体包裹体均一温度研究成藏期方法的特点,在塔里木盆地温演化过程分析的基础上,提出了流体包裹体样品埋深范围在150 m以内的选取原则,统计了典型井主要含油层位样品的流体包裹体均一温度,并以5 ℃的温度间隔分别分析了奥陶系、石炭系、三叠系流体包裹体均一温度分布。结合埋藏史-热史分析,认为对于轮南地区奥陶系沉积后主要成藏可分为4期:分别发生在中-晚泥盆世,大约在375~394百万年; 早-中二叠世,大约在251~282百万年; 早-中白垩世,大约在97~117百万年; 新近纪,大约在4~18百万年。

The multiphase tectonic movement in Lunnan area of Tarim basin has an important role in the hydrocarbon accumulation,we need to accurately determine the hydrocarbon accumulation period if we want to know the formation and distribution of reservoir.In this paper,according to the method of determining accumulation period by homogenization temperature of fluid inclusions,based on the analysis of the temperature evolution process of Tarim basin,we put forward the selecting principle of fluid inclusion samples which buried depth range within 150 meters,analyze the homogenization temperature of fluid inclusions of typical wells samples in main oil-bearing formation,and then analyze the homogenization temperature distribution of fluid inclusions in Ordovician,Carboniferous and Triassic with 5 ℃ interval.Combined with the analysis of burial history and thermal history,we draw the conclusion that the main accumulation can be divided into four stages in Ordovician of Lunnan area:middle-late Devonian,approximately 375~394 million years; early-middle Permian,approximately 251~282 million years; early-middle Cretaceous,approximately 97~117 million years; Neogene,approximately 4~18 million years.