【作者】 王树恒；

【导师】 辛仁臣；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2002， 硕士

【摘要】 本项研究综合采用层序地层学、沉积学、地震地层学、储层地质学等的最新理论和方法，运用地震、测井、录井、岩心及分析资料，对松辽盆地北部泰康地区中部组合的层序地层格架、沉积相进行了深入细致的分析和研究，并对有利储层及岩性圈闭进行了初步分析和预测。成果丰富了陆相湖盆层序地层学和湖盆沉积学，对今后该区油气勘探与开发具有重要的借鉴价值。 研究区位于松辽盆地北部泰康地区，构造上位于松辽盆地西部斜坡区。按传统地层分层，研究层段包括青山口组、姚家组及嫩江组一段。以姚家组底（T₁）为界划分两个层序，由下至上分别命名层序1和层序2。青山口组以G₃砂体为界，其下是层序1的湖泊扩张体系域，其上是层序1的湖泊萎缩体系域。姚家组和嫩江组一段是层序2的湖泊扩张体系域。 根据地震资料可识别，井间可对比的原则，研究层段由下至上划分了12个砂组，单砂组厚度在30m左右，每个砂组基本上对应一个地震反射同相轴。青一段为高5砂组；青二三段划分为高4～高0五砂组；高3砂组分布范围较大，高0砂组分布范围较小；姚一段划分为葡2、葡1两个砂组，葡2砂组地层分布范围最小；姚二三段划分为萨3～萨1砂组三个砂组，嫩一段划分为萨0砂组。 多数砂组发育的沉积微相类型和分布的共同之处在于，西侧多以河流三角洲和滨浅湖沉积为主，东部以深湖—半深湖为主其中夹有重力流，但由于各砂组沉积范围的变化，造成沉积区最小时期的高0、葡2砂组深湖—半深湖及湖底扇沉积不发育，而沉积范围最大时期的萨0砂组深湖—半深湖及湖底扇沉积极其发育。 研究区研究层段的最有利储层是三角洲河口坝砂体和湖底扇砂体，各砂组发育的湖底扇砂体区和高5砂组发育的河口坝砂体发育区是形成岩性圈闭最有利的场所。更多还原

【Abstract】 This study not only comprehensively adopt the latest theoris and methods of sequence stratigraphy, sedimentology, seismic stratigraphy, reservoir geology, etc, but also apply seism, logging, log, core, and analytical materals. This item profoundly analyses and studies the sequence stratigraphic framewok and sedimentary facies in the middle assemblage of Taikang region in northern Songliao Basin, and then preliminarily analyses and predicts their favorable reservoirs and lithologic trap. The achievements enrich the sequence stratigraphy in continental lake basin and lake basin sedimentology, furthermore, the achievements have important reference value for oil and gas exploration and exploitation in this region in future.The study area locates Taikang region in northern Songliao basin. In structure it locates western slope region in Songliao basin. According to the traditional stratigraphic division, the study formation consists of Qingshankou, Yaojia group, and the member-one of Nenjiang group, and classified into two sequences by the bottom of Yaojia formation(Ti’). From down to up they respectively are named sequence 1 and sequence 2. Qingshankou formation borders by G3 sandbody. The formation inside its is lake expanding system tract of sequence 1, and on its is lake contracting system tract. Yaojia formation and the member-one Nenjiang group are lake expanding system tract of sequence 2.According to the principle of seismic datas being distinguished and well and well being contrasted, the study formations are divided into 12 sand-groups. The thickness of each sand-group is about 30 meters. Each sand-group basically correspongs one seismic reflection event. Member-one of Qingshankou is Gao 5 sand-group. Member-two and three of Qingshankou are divided into Gao 4~ Gao 0 five sand-groups. The distribution of Gao 3 sand-group is relatively large, and of Gao 0 sand-group is relatively little. Member-one of Yaojia group are divided into Pu 2 and Pu 1 two sand-groups. The distribution of Pu 2 sand-group is the lest. Member 2~3 of Yaojia group are divided into Sa 3~ Sa 1 three sand-groups. Member-one of Nenjiang group is divided into Sa 0 sand-group.The same points of medimentary microfacies types and distribution by developed in many sand groups lies in that they dominate with river delta and shore-shallow lake in west and dominate with deep lake-semi-deep lake and contain gravity flow. The change of sediment scope of each sand-group makes deep lake-semi-deep lake and sublacustrine fan sediment of Ga 0 and Pu 2 sand-groups not being developed during the lest sediment area, but the deep lake-semi-deep lake and sublacustrine fan sediment during the largest sediment scope of Sa 0 is well developed.The most favorable reservoirs of study formatioms in study area are delta river mouth bar sand body and sublacustrine fan sand body. The sublacustrine fan sand body region developed in each sand group and the river mouth bar sand body region developed in Gao 5 sand-group are the most favorable regions of developing lithologic traps更多还原