胜利探区油气共/伴生资源综合利用前景

Prospects for comprehensive utilization of symbiotic/associated oil and gas resources in exploration area of Shengli Oilfield

胜利探区发现了多种油气共/伴生资源,部分为关系国防、农业、高科技等行业安全的战略资源,极具开发利用价值。针对目前研究较深入、已经工业化生产的氦气、卤水(钾盐)、铀矿等,分析了其在中国的勘探开发现状、在胜利探区的赋存特征、成矿条件及综合利用前景。研究结果表明:①氦气高异常主要分布在济阳坳陷、柴达木盆地的10余个地区,元古界—新生界的多个层位,具有与常规天然气、非烃气、页岩气等伴生的多种赋存类型。②济阳坳陷、柴达木盆地在古近纪—第四纪均具有发育卤水(钾盐)的古气候、古环境,其中东营凹陷油田水含有丰富的溴、锂、钾等,柴达木盆地的油田水中钾、锂较高,部分地区含量值达工业品位。③铀矿的主要类型为砂岩型,车排子凸起的多口井在白垩系、新近系呈现高异常自然伽马值,为最有利的伴生铀矿远景区;吐哈盆地、柴达木盆地及济阳坳陷的部分胜利探区也具有发育铀矿的铀源、构造、岩相、水文地质等成矿条件,部分井的自然伽马测井数据表现出高异常值。整体上胜利探区油气共/伴生资源具有类型多、分布层位多、异常区域广的特点。若充分利用胜利油田在勘探基础资料、地质基本认识、工程设施等方面的天然优势,尽快系统开展油气共/伴生资源成藏(矿)规律研究、资源潜力评价、提取工艺技术攻关等工作,有望将其发展成为新的业务增长极。

Various symbiotic/associated oil and gas resources have been found in the exploration area of Shengli Oilfield,and some of them serve as strategic resources for guaranteeing the security of national defense,agriculture,high-tech,and other industries,which are of great value in development and utilization.The current exploration and development status,occurrence characteristics,ore-forming conditions,and comprehensive utilization prospects of helium,brine(potassium salt),and uranium ore that have been deeply studied and industrially produced in China were analyzed.The results show that①the high helium anomalies are mainly dis‐tributed in more than 10 areas of the Jiyang Depression and Qaidam Basin,as well as in multiple layers of the Proterozoic-Cenozoic,associated with conventional natural gas,non-hydrocarbon gas,and shale gas;②Jiyang Depression and Qaidam Basin provide the paleoclimate and palaeoenvironment for developing brine(potassium salt)from the Paleogene to the Quaternary.The oilfield water in Dongying Sag contains abundant amounts of bromine,lithium,and potassium,and more potassium and lithium are found in the oilfield water in Qaidam Basin,with the content in some areas reaching industrial grade;③the sandstone is the pri‐mary type of uranium ore.The multiple wells in Chepaizi Uplift exhibit highly abnormal gamma values in the Cretaceous and Neo‐gene,indicating that this area is the most favorable prospective area of associated uranium ore.In other exploration areas of Shengli Oilfield,such as Tuha Basin,Qaidam Basin,and Jiyang Depression,the forming conditions for uranium ore are observed,includ‐ing uranium sources,structures,lithofacies,hydrogeology,etc.,and natural gamma logging data from some wells show high ab‐normal values.Overall,the symbiotic/associated oil and gas resources in the exploration area of Shengli Oilfield show the character‐istics of various types,multiple layers,and wide abnormal areas.It is necessary to fully take the natural advantages of Shengli Oil‐field in terms of basic exploration data,basic geological achievements,and engineering facilities,to systematically carry out re‐search on the reservoir forming(ore-forming)law of symbiotic/associated oil and gas resources,evaluate resource potential,and innovate extraction technology as soon as possible,to achieve a new business growth pole.