摘要
在对川西坳陷天然气的系统采样及C4～C7指纹烃类分析的基础上，详细研究了川西坳陷C4～C7指纹烃类的分布特征。研究区天然气气源具有较大相似性，母质主要为Ⅱ2-Ⅲ型干酪根。通过分析纵向上芳烃分布特征，认识到研究区C4～C7指纹烃垂向上分带性明显。研究认为，上休罗统蓬莱镇组天然气为长距离，并呈游离相运移聚集，中休罗统天然气具有混相涌流的运移特征，而上三叠统须家河组二段、四段天然气，主要为后期经短距离运移成藏。
The patterns of C4～C7 fingerprint hydrocarbons illustrate the similarity of the source-rock of the survey regions of Xinchang, Hexinchang and Xiaoquan in the western Sichuan depression, and the organic matter of gas source rock is mainly of Ⅱ2 and III types based on systematic sampling and analysis of natural gas C4～C7 fingerprint hydrocarbons. Through analysis of the distribution of aromatic hydrocarbon contents in vertical profile, the authors argue that the long migration of natural gases as dissociative forms in Penglaizhen formation,natural gas migration as mixed forms in middle jurassic formation and short migration to form gas reservoir in the upper trassic T3X4 and T3X2 of Xujiahe formation.
出处
《物探化探计算技术》
CAS
CSCD
2008年第2期113-116,80-81,共4页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
川西坳陷
C4~C7指纹烃
干酪根
运移相态
western Sichuan depression
C4～C7 finger-print
kerogen
migration phase
