他拉哈-齐家地区葡萄花油层成藏特征

Characteristics of hydrocarbon accumulation in the Putaohua reservoir of Talaha—Qijia region

运用岩心、录井、测井资料,通过岩心相——单井相——剖面相——平面相分析,综合油源对比和对已知探井的油气显示情况及试油结果的分析,总结了他拉哈-齐家地区葡萄花油层的烃源岩特征、沉积特征、储层特征、盖层特征及油气运移聚集特征。葡萄花油层沉积以三角洲湖泊体系为特征,发育有三角洲和湖泊相,研究区内葡萄花油层成藏受断裂、构造、砂体组合和坡折带等控制,油气从负向构造向正向构造运移,从凹陷轴向两侧运移。研究结果为油田开发和生产提供了可靠的理论依据。

The Putaohua reservoir in the Talaha-Qijia region has been studied for the characteristics of source rock,sedimentation,reservoir,caprock,and hydrocarbon migration and accumulation by using coring,mud logging and well logging data and by analyzing core facies-single well facies-profile facies-plane facies in conjunction with oil-source correlation as well as analyses of oil and gas shows in known exploratory wells and testing results.The sedimentation in the Putaohua reservoir is characterized by delta lacustrine system where developed delta and lacustrine facies.The hydrocarbon accumulation in the Putaohua reservoir was controlled by faulting,structure,sand bodies combination and slope break.Oil and gas had migrated from negative structure to positive structure and from sag axis to both sides.The result of this study provides a reliable theoretical basis for oilfield development and production.