Analysis and calculation of hydrocarbon accumulation history and paleocurrent potential by studying fluid inclusions——An example from the Upper Paleozoic in Yulin,Ordos basin

Shan Xiuqin; Li Jian; Hu Guoyi; Chen Honghan; Luo Xia; Gao Jiayu

doi:10.11743/ogg20070205

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Analysis and calculation of hydrocarbon accumulation history and paleocurrent potential by studying fluid inclusions——An example from the Upper Paleozoic in Yulin,Ordos basin
Vol. 28, Issue 2, Pages: 159-165(2007)
Online First：25 April 2007，

Published：2007
DOI： 10.11743/ogg20070205
稿件说明：

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DOI：

Shan Xiuqin, Li Jian, Hu Guoyi, et al. Analysis and calculation of hydrocarbon accumulation history and paleocurrent potential by studying fluid inclusions——An example from the Upper Paleozoic in Yulin,Ordos basin[J]. 2007, 28(2): 159-165. DOI： 10.11743/ogg20070205.

摘要

通过包裹体测温、荧光光谱分析及流体势分析

结合区域地质资料

认为鄂尔多斯盆地榆林地区上古生界油气具有多期连续性充注特征.从晚三叠世中期到早白垩世末期

油气不断注入

烃类组分随埋深由低成熟到高成熟

虽可划分为6期

但应为连续充注的一期成藏

其中早侏罗世中期—中侏罗世末期和中侏罗世末期—早白垩世末期是两个大规模天然气充注时期.用VTFLINC PVT模拟软件计算包裹体流体势结果显示

榆32井是长期的低势区

榆43-8井和榆25井等流体势较高.

Abstract

Research on fluid inclusion temperature

fluorescent spectroscopy

current potential analysis

and regional geological data

indicates that the Upper Paleozoic pools are characterized by multistage but continuous charging in Yulin

Ordos basin.From the middle Late Triassic to the end of the Early Cretaceous

hydrocarbons were continuously inputting into the reservoirs and their maturity evolved from low to high along with increasing burial depth.The charging is actually a continuous one-stage process

though it can be divided into 6 stages

of which the middle Early Jurassic-end of Middle Jurassic and the end of Middle Jurassic-end of Early Jurassic are two large scale gas charging stages.The calculated fluid inclusion potentials with PVT simulation software of VIFLINC indicate that paleocurrent potential is low in well Yu32 and high in well Yu43-8 and Yu25.