Application of geochemical parameters in hydrocarbon m igration studies: taking Tazhong area of the Tarim Basin as an example

doi:10.11743/ogg20100617

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Application of geochemical parameters in hydrocarbon m igration studies: taking Tazhong area of the Tarim Basin as an example
Vol. 31, Issue 6, Pages: 838-846(2010)
Online First：28 December 2010，

Published：2010
DOI： 10.11743/ogg20100617
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DOI：

Application of geochemical parameters in hydrocarbon m igration studies: taking Tazhong area of the Tarim Basin as an example[J]. 2010, 31(6): 838-846. DOI： 10.11743/ogg20100617.

摘要

以塔中地区为例，根据饱和烃、芳烃、含氮化合物、流体包裹体微量元素等参数的分析资料，运用地球化学追踪技术方法研究油气运移特征，证实在该区内油气垂向运移和侧向运移的普遍性。塔中地区断裂活动为油气垂向运移提供了有效通道，不整合面和连通性砂体为油气侧向运移提供了通道。实践表明，将地球化学资料与地质特征分析相结合，研究油气垂向运移，分析断裂活动史，以断裂为线索，立足多目的层部署，可以提高塔中地区勘探成功率。对油气侧向运移的输导体系的研究表明，有一定构造背景的优质储层是侧向运移的优势通道，选择的目的层段相对构造高部位是以侧向运移为主的有利油气聚集区。

Abstract

Hydrocarbon migration in the Tazhong area of Tarim Basin is studied through geochem ical tracing based on analyses of saturated hydrocarbons，aromatic compounds，nitrogenous compounds and trace elements of fluid inclusions.The result reveals that both vertical and lateral hydrocarbon migration are common in the study area.Faults here are the effective verticalm igration pathways，while unconform ities and connected sand bodies serve as the lateralm igration pathways.The exploration success rate can be improved by studying vertical hydro-carbon migration through integration ofgeochemical datawith geological data and selectingmultiple targets based on an analysis of faulting history.Analysis of lateral carrier systems for lateral hydrocarbon migration indicates that excellent reservoirswith certain tectonic settings are dominant pathways forlateral hydrocarbon migration.Therefore，the relative structural highs of these quality reservoirs are favorable for hydrocarbon accumulation through lateralm igration.