南堡凹陷无井探区烃源岩评价研究  

Evaluation of source rocks at no exploratory well area of Nanpu Sag, Bohai Bay Basin

作　　者：张振英[1] 邵龙义[1] 柳广第[2] 贾林平[3] 杨光明[3] 

机构地区：[1]中国矿业大学 [2]石油大学 [3]北京市经济管理干部学院

出　　处：《石油勘探与开发》2004年第4期64-67,共4页Petroleum Exploration and Development

摘　　要：根据南堡凹陷海域地区钻井少给烃源岩评价和资源量计算带来较大困难的实际情况,研究了该凹陷沉积相与有机质丰度、类型的关系,通过无井探区的地震地层学的沉积相研究成果,预测南堡凹陷蛤坨地区东三上段烃源岩的有机质丰度高(有机碳平均为1.14％,生烃潜量为4.92mg/g)、类型好(Ⅱ_1型干酪根)、已进入成熟阶段,综合评价为好烃源岩。东三下段烃源岩有机质丰度和类型与东三上段的各项参数相近,处于生烃高峰阶段,综合评价为好烃源岩。东二段乖口东一段评价为较差烃源岩。根据南堡凹陷不同层段的暗色泥岩颜色与有机碳的关系,提出灰黑、黑色泥岩的达标率为72.5％,灰、褐灰色泥岩为47.6％,灰、浅灰色泥岩为55.6％。There are few exploratory wells in offshore of the Nanpu Sag, which brings difficulty to the source rock evaluation and reserves calculation. The organic abundance and kerogan type in the Dongying Formation of Hatuo area of Nanpu Depression could be evaluated by using the seismic stratigraphy. The source rock in the Ed_3~1 is a good one because its higher organic abundance (TOC 1.14%, S_1+S_2 4.92mg/g),and type Ⅱ_1 kerogan at a mature stage. The source rock in the Ed_3~2 has similar parameters (TOC 0.99%;S_1+S_2 4.36mg/g;type Ⅱ_1 kerogan), has been in peak stage for generating hydrocarbon, and is also evaluated to be good source rock, and the source rocks in the Ed_2 are evaluated to be bad source rocks. According to different colors of dark mudstone,the TOC qualification rates are counted at different intervals (TOC qualification rate; No 12, 72.5%; No13,47.6%; No 14,55.6%).

关 键 词：南堡凹陷 烃源岩评价 沉积相 有机质丰度 有机质类型 油气资源评价 

分 类 号：TE122.1[石油与天然气工程—油气勘探]