CAJ | 학술논문

鄂尔多斯盆地姬塬地区长9油层组展示了较好的勘探前景,但对其成藏机制方面的研究却相对薄弱,成为制约勘探的难题。该文应用油藏地球化学、成藏地质学和沉积学等研究手段和方法,探讨了油气来源、运移、运移动力、运聚方式等问题。结果表明：姬塬地区长9油层组原油来源于上部长7油层组的优质烃源岩;长7烃源岩生烃增压产生的异常高压、长7与长9油层组过剩压力差是长7烃类向长9储层运移的主要动力;纵向叠置、横向上连片的砂体和区域性构造活动形成的裂缝为沟通长7优质烃源岩和长9油层组储层的优势运移通道。
악이다사분지희원지구장9유층조전시료교호적감탐전경,단대기성장궤제방면적연구각상대박약,성위제약감탐적난제。해문응용유장지구화학、성장지질학화침적학등연구수단화방법,탐토료유기래원、운이、운이동력、운취방식등문제。결과표명：희원지구장9유층조원유래원우상부장7유층조적우질경원암;장7경원암생경증압산생적이상고압、장7여장9유층조과잉압력차시장7경류향장9저층운이적주요동력;종향첩치、횡향상련편적사체화구역성구조활동형성적렬봉위구통장7우질경원암화장9유층조저층적우세운이통도。
The research means and methods of reservoir geochemistry,reservoir geology and sedimentology are applied to discuss the hydrocarbon sources,migration mechanism,dynamics and accumulation pattern of Chang 9 reservoir in Jiyuan area.The result shows that the crude oil of Chang 9 reservoir comes primarily from the high-quality hydrocarbon source rocks of Chang 7 reservoir,of which the hydrocarbon migrated downward and accumulated in Chang 9 reservoir.The main dynamic of Chang 7 hydrocarbon migrating to Chang 9 reservoir is mainly from the abnormal high pressure of Chang 7 hydrocarbon source rock hydrocarbon pressurization and excess pressure difference between Chang 7 and Chang 9 reservoir.The vertical superposition and lateral connecting sand bodies and the fractures formed in the regional tectonic activity are the favorable migration path for connecting Chang 7 high-quality hydrocarbon source rocks with Chang 9 reservoir.