伊通盆地岔路河断陷伊69井区天然气成藏条件研究

Analysis of Natural Gas Reservoir Forming Conditions of Yi 69 Well Area in Chaluhe Fault Depression

通过收集分析伊69井钻井地质设计、录井、测井、地震数据体、扫描电镜、前人研究成果(报告、多媒体)等资料,对伊69井进行了基础地质条件分析、烃源岩定向和定量评价、储层评价、盖层评价,系统研究了该区的生、储、盖、运、圈(保)等成藏要素及其时空匹配关系,最终完成了对伊69井区天然气成藏条件的研究。结果表明,伊丹凸起具备较好的烃源岩条件和盖层条件,但储层条件较差。烃源岩大量生排烃期开始于圈闭形成前,圈闭对早期烃源岩的生烃聚集是无效的。

This paper collects and analyzes the information of Yi 69 wells including drilling geological de- sign, logging, seismic data, scanning electron microscopy （sem）, previous research results （reports, multi- media） ,etc. It make an analysis on the basic geological conditions,reservoir and caprock of Yi 69 wells ,and hydrocarbon source rock in direction and quantity, which offers a systematic study natural gas reservoir forming conditions of Yi 69 well area in Chaluhe fault depression. The result shows that,Yi Dan bulge pos- sesses a good hydrocarbon source condition and caprock condition, but a poor reservoir condition. The hy- drocarbon generation and expulsion stage starts before the forming of entrapment, and the entrapment is invalid for the early hydrocarbon generation gathering.