塔里木盆地北部地区天然气成因类型的探讨

AN APPROACH TO THE ORIGIN TYPES OF NATURAL GAS IN THE NORTHERN TARIM BASIN

杨笃敬

Yang Dujing

地质矿产部西北石油地质大队 乌鲁木齐 830011

Northwest Parly of Petroleum Geology, MGMR

本文主要根据地质矿产部系统对塔里木盆地北部地区油气勘查的大量分析实验数据、地球化学特征等系统资料,对其天然气组成、轻烃的碳同位素特征进行研究,从而划分其天然气成因类型。研究指出,塔北地区以油型气为主,有少量的煤型气和混合气存在。其中雅克拉断凸区以油田气-凝析气为主、阿克库勒凸起区以裂解气为主、沙西凸起区有少量氦气存在。

Based on plenty of systematic analytical and experimental data and geochemical characteristics of petroleum exploration in the northwest Tarim Basin, the paper mainly approaches the compositions, light hydrocarbons, and carbon isotopic characteristics of the natural gas, as well as the divisions of the origin types in the area. The study reveals that the northern Tarim Basin is dominated by oil-prone gas with minor coal-prone gas and mixed gas. However,the Yakela uptaulted area is mainly predominated by gas-conden-sate gas, while in the Akekule embossed area, it prevails pyrolytic gas. Only minor helium gas is produced at the Shaxi uplifting area.

https://doi.org/10.11781/sysydz199301037