【作者】 张婷婷；

【导师】 薛林福；

【作者基本信息】 吉林大学 ， 数字地质科学， 2009， 硕士

【摘要】 黄骅坳陷处于天津东南,研究区位于黄骅坳陷南部,是早第三纪以来新生代陆内伸展盆地。本文以层序地层学、沉积学和石油地质学为理论依据,并结合测井、地震以层序地层分析研究为主线,找出区域对比标准;采用旋回对比、分级控制的原则,对全区进行层序及体系域划分和对比、建立该区等时层序地层格架;并主要分析了构造在沙河街时期对层序发育的影响;总结出四种油气藏类型;在此基础上提出了孔南地区有利的勘探区带。研究认为,孔南地区沙河街组构造演化经历了3个阶段,可划分为3个三级层序,8个四级层序,9个体系域,9个基准面中期旋回,16个半旋回。沧东、徐西断层为边界控盆断层,分别在沧东断层东侧级徐西断层西侧发育多个三角洲及扇三角洲。盆地中部孔店凸起在沙河街时期同步发育,为滚动背斜,并形成了孔东孔西断层。盆地总体格局呈北东向展布,古地貌上从南西向北东方向地势逐渐增高。在北部靠沧东断层一侧形成沧东凹陷,在南部靠徐西断层一侧形成南皮凹陷。河街时期的孔南地区为右旋张扭性构造应力场中形成的拉分盆地。边界断层活动速率控制盆地的沉降速率,进而控制了层序的形成及演化。低水位体系域砂体,上倾斜坡区砂体及孔店凸起生物灰岩层为有利的勘探区域。本文的研究结论对孔南地区的勘探具有重要的意义。更多还原

【Abstract】 The south of KongNian Area is located the south of HuangHua Depression , is north from NanDi south to DengMingSi, CangDong fault to the west as the boundaries XuXi fault to the east as the boundaries,its area is 4700km2.It includes seven the second structural unit which are two big depressions which are CangDong and NanPi-XuXi depression,JieDi-QiLiDian secondary bump,SheNvSi slope,DengMingSi-WuMaYing slope,KongDian bump,and XiaoGuanTun secondary bump.The south of KongDian Area ShaHeJie Group layer after structure,its original lake basin construction changed a lot.So the structure affected the deposition.The lake basin deposition is so indistinct that it is possiable to make some huge blindness during exploring.This article’s substance is to resume ShaHeJie’s the lake basin sequence development mode.To analysis ShaHeJie’s the lake basin sequence development mode, the first,we have to establish isochronal layer framework. According the foundation of sequence stratigraphy, interpreting the earthquake well tie section, comparing the basal level cycle, the ShaHeJie can be divided three tertiary sequences,eight tchetvertyi sequences,nine systems,nine basal level middle period cycles and sixteen half cycles.And the Sequence One is the Sha Three, the Sequence Two is the Sha Two, the Sequence Three is the Sha One.Under the inhibition of isochronal layer framework, analysis the palaeoenvironment of ShaHeJie’s three sequances.The first,with analysising the lithofacies, lithofacies group type and electrofacies,we can know the ShaHeJie grows three sedimentary facies which are braid river delta, fan delta and lake,including seven subfacies and fifteen microfacies.The second ,with analysising the material source with light mineral and heavy mineral,we can know:the south WuMaYing area grows the braid river delta along the basin axial direction,SeNuSi,CangZou and NanDi near the CangDong faultage grow fan delta,WangGuanTun near the XuXi faultage grows fan delta.The last one,make the layer changing,the sandstone thickness changing and the sediment charge changing together,we can clearly recognize flat feature of ShaHeJie sedimentary facies.With the foundation of isochronal layer framework, confirming the sedimentary facies distribution,and interpreting the earthquake well tie section,we can analysis the ShaHeJie basic structure morphotype and filling pattern. It is concluded that two basic structure morphotypes and filling patterns which are duplex fault duplex filling and duplex fault single filling. Sedimentary deposit particles are thiner from sedimentation center of amphi boundary fault to upwarping of basin inner.The next ,to confirm the key point of the lake basin structure focuses the two factors:the moving period of CangDong ,XuXi faults and the formation period of KongDian structural belt.With anaylsising layer filling model and boundary sedimentary facies ,we can know that the CangDong fault,XuXi fault are border fault which deposites and controles the basin in the same time,KongDian structural belt forms in the same time when the ShaHeJie deposites.It is concluded that the ShaHeJie basin is continental facies syndeposit fault basin in the context of HuangHua depression.Based on the structure movement of the east of china tertiary,we know that this kind of the basin is formed under the action of the right hand rotation drawing tectonic stress. Based on the above views,we can clearly recognize ShaHeJie period’s structure and deposition.We can anaylsis the possiable hydrocarbon accumulation type.There are three hydrocarbon accumulation types in the ShaHeJie period:structure-stratigraphic hydrocarbon reservoir,lithologic updip pinchout hydrocarbon reservoir and layer upfold hydrocarbon reservoir.This conclusion is important significance to exploration activity of KongNan area ShaHeJie.更多还原