宁东地区延安组泥页岩油气资源勘探潜力评价

Evaluation for Oil and Gas Resources of Shale Exploration Potential of Yanan Formation in the East of Ningxia Province

宁东地区延安组沉积有泥页岩岩层,该套泥页岩至今仍是页岩油气资源勘探的盲区。本文通过对宁东地区的泥页岩野外露头和岩芯样品进行泥页岩基本性质的测定,发现研究区延安组泥页岩粘土矿物含量较高,有机碳含量高,干酪根类型以Ⅱ2型为主。但是,此套泥页岩的有机质成熟度较低,未达到烃源岩生烃门限,因此不具备页岩气的勘探潜力。同时,通过对泥页岩进行含油率的测定和岩石热解分析,发现其含油率及生油潜量达不到油页岩的标准,因此研究区延安组也不具备油页岩的勘探潜力。

There is a set of shale which is still a blind area of shale oil and gas resources in Yanan Formation in Ningdong area.In this paper,fundamental tests for shale samples from field outcrops and rock cores in Ningdong area were taken,it is found that the content of clay and TOC of shale in Yanan Formation are high and the organic matter type is mainlyⅡ2.However,this set of shale has low thermal maturity which has not reached the hydrocarbon threshold,as a result,there is no shale gas exploration potential in Yanan Formation.At the same time,oil contents of the shale were tested and rock pyrolysis analysis was taken,the results show that the oil contents and oil genetic potential cannot come up to the standard of oil shale,so there is also no oil shale exploration potential in Yanan Formation in Ningdong area.