摘要
孟岗集洼陷是东濮凹陷内勘探程度最低的地区。1997年部署的濮深 8井不仅钻获商业油流 ,而且全面揭示了洼陷的地层层序。烃源岩的产烃潜力、原油特征及油气母源等研究表明 ,该区存在 3套烃源岩 :沙一段源岩为未成熟—低成熟烃源岩 ,沙三段源岩为成熟—高成熟烃源岩 ,二叠系源岩为高成熟烃源岩 ,生烃高峰期主要在沙三段沉积时期。濮深 8井原油是高成熟原油 ,原油母质为还原环境中形成的来自高等植物和低等水生生物的混源有机质。原油来源于沙三段烃源岩。钻探和研究表明 ,孟岗集洼陷沙三段具有较好的成烃条件 ,洼陷具有相当的资源背景 ,是值得重视的油气勘探区。
Menggangji sag is a region least explored in Dongpu depression. However, not only commercial oil flow has been obtained but a stratigraphic sequence has been revealed in Well Pushen 8 drilled in 1997. A study on potential of hydroca r bon generation in source rocks, characteristic of crude oil and mother substance of oil and gas shows that there are 3 sets of source rocks: immature low matur e source rocks in Member S 1; mature highly mature source rocks in Member S 3; and highly mature source rocks in Permian. The peak generation period of hydr ocarbon was in the phase of S 3 deposition. Crude from Well Pushen 8 is of high ly matured one. Mother substance of such crude are derived from a hybrid organic matter containing high plants and low aquatic organisms. This crude is from S 3 source rocks. Results of exploratory drilling and study show that Member S 3 in Mengguangji sag has relatively better hyd rocarbon generation conditions. This sag has a relatively better source backgrou nd and is an exploratory target that should be stressed.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第5期32-35,共4页
Petroleum Exploration and Development
关键词
东濮凹陷
油气勘探
濮深8井
油气特征
烃源岩
Source bed, Crude oil, Natural gas, Geochemical characteristic, Liaohe depression, Menggangji seg
