Lowstand fans and lowstand wedges formed in lowstand system tracts of sq5 and sq6 ( that is damoguaihe formation ) and deep water turbidite fans deposed in late trangrassive system tract and early highstand system tract are the major reservoir with good physical characteristics 层序5和层序6 (相当于大磨拐河组下段)低水位体系域沉积的低水位楔和低水位扇及水进晚期、高水位早期出现的深水浊积扇具有良好的储集物性，也是主要的储集层。
The lithological traps related to jishan delta ? turbidite fan depositional system inherently developed during the base level falling period of c3 cycle and the base level rising period ; the lithological traps related to the underwater fan depositional system near xiakou fault developed during c2 cycle ; the lithological traps related to qudi fan delta developed during the base level falling period of c2 cycle ; and there are a few lithological traps related to shangfeng delta . these predicted traps are mainly distributed in the deeply low - lying areas 在沉积体系、沉积相研究的基础上，对临南洼陷沙三段岩性圈闭分布作出了预测，指出了各旋回基准面下降期是寻找岩性圈闭的有利层序地层位置， (扇)三角洲前缘滑塌作用或快速充填作用形成的浊积扇或滑塌作用形成的浊积岩体是岩性圈闭形成的主要场所。
The most favourable sequences for subtle traps are cycle 3 and cycle 4 , and the most favourable oil and gas - pool forming regions are jishan sandstone , fan - delta sandstone of south part of linnan sag , sliding turbidity sandstone of the slope part of shuangfen delta front and turbidity and sub - fan near fault of jiangjia dian 基山砂体、临南洼陷南部沙三下扇三角洲砂体、双丰三角洲前缘的斜坡地带的滑塌浊积岩砂体和江家店地区的浊积扇体和近岸水下扇体是最有利的勘探目标区。
The main conclusions are as follows ; firstly , under the influence of three phases of episodic activities , three two - order sequences is composed of three depositional cycles and three regional unconformities ; secondly , under the control of structure activities such as fault - block activities and the influence of three - order climate cycles and source recharge , lower cretaceous can be divided into six three - order sequence ; thirdly , because fault activities is weak and fault slope is gently , fan deltas exist in steep slopes in early and later stages and subaqueous fans exist and turbidite fans exist in troughs in middle stage 主要的结论为：其一，受三期幕式活动影响，断陷形成了3个大的沉积旋回和3个区域不整合面，构成了下白垩统3个二级层序；其二，受断陷内翘倾和块断等构造活动的控制，以及三级气候旋回和物源供给因素的影响，下白垩统划分出6个三级层序；其三，在单断断陷湖盆中，湖泊阶段的早、晚期由于凹陷边界断层活动较弱，断面较缓，陡坡可以发育扇三角洲，在湖泊阶段的中期主要为水下扇砂砾岩体，并在洼槽区发育浊积扇。
The paper divided turbidite fan in deep water from long source into braided channel microfacies , inter - braided channel microfacies , medium fan over - belt microfacies , and external fan subfacies , and divided slump turbidite which related with delta into medium fan subfacies and external fan subfacies , and summed up 15 kinds of marking of subfacies and microfacies classification . at the same time , it formed a series of effective technology of analyzing turbidite source at the base of studying region geological which combined with analyzing the content change of terrigenous debris , with the found of logging facies , and with the ancient terrestrial magnetism test and other technology means under the guidance of three - dimensional model of turbidite which has been founded already and the flat surface feature of microfacies 将远源深水浊积扇划分为辫状水道微相、辫状水道间微相、中扇过渡带微相和外扇亚相；将与三角洲有关的滑塌浊积扇划分为中扇和外扇两个亚相，并总结了浊积岩沉积划分各种亚相、微相类型的十四种标志，分别为:岩石类型、层理类型、砂岩单层厚度、粒度结构特征(粒度中值、分选性、概率曲线) 、生物化石、储层物性(孔隙度、渗透率) 、泥岩隔层特征(泥岩单层厚度、层数、颜色) 、鲍玛层序组合和自然电位曲线特征。
There were fan - delta , turbidite - fan , shallow - lake , shore - marsh , semideep - lake and volcano - debris facies . in the area of the well ou39 and ou44 , fan - deltas developed both in the middle and the top strata of the third member of the shahejie formation . the former lies in the north area of the well ou39 , belonging to the steep - slope style which was controled by inertia factor 在欧39 、欧44井区，沙三中和沙三上均发育扇三角洲沉积，前者具以惯性因素控制的陡坡型为特点，分布范围相对较小，位于欧39井以北的地区；而后者以摩擦因素控制的缓坡型为特色，分布范围广；而沙三下在该区则发育了一套浊积扇体，这一规律正好体现了构造演化特点对沉积充填型式及相展布的控制作用。
On the east terrace - fault slope of the depression , the sedimentary mode of fan - shaped delta - slump turbid fan - deep lake facies are developed . on the long axial direction of fula depression , the southeastern groove was filled with a large scale delta which was the main sources , the other little delta limited by the 3 syndepositional fault was distributed down the slope edge of the northern sub - depression . this stage developed a favorable oil sources , reservoir and regional seal which formed the good matching relations of generation , reservoir and seal in the time - space zone Abugarbra组的sc和sd层序发育在边界断层和同沉积断层活动剧烈、湖盆扩张期，凹陷中心发育半深湖-深湖相沉积，在凹陷陡坡发育近岸水下扇，断阶缓坡带发育扇三角洲?滑塌浊积扇?深湖相组合，长轴凹槽和北部次凹的北部缓坡带发育三角洲体系，此层位是有利生油层和岩性圈闭发育层段。
From comprehensive analysis , the conclusion can be drawn that the favorable reservoir of the upper part of the forth member of shahejie formation of bonan sag is the outer fan sandbody of fan delta near the y159 of the eastern part of the sag , the middle fan and outer fan of y160 , midian fan and distal fan of proximal turbidite and slump turbidite 综合分析认为，有利储集相带为洼陷东部深洼区附近的义159井区扇三角洲扇端砂体、义160井区扇三角洲的扇中及扇端砂体、近岸浊积扇及滑塌浊积扇的中扇及外扇砂体。
On the basis of the framework of chronostratigraphic sequence and the analysis of well - log , seismic section , the paper studied types and the distribution of sedimentary facies . three types of sediment can be identified : braided river delta systems mainly formed on the south slope . little - sized turbidit fan mainly formed in the middle deep area and dan delta mainly formed on the north slope of the depression 在等时层序地层格架的基础上，通过测井、地震资料分析，对凹陷沉积相的类型及空间分布进行了研究，研究表明南坡主要发育辫状河三角洲体系，深洼区发育小型浊积扇体系。北坡主要发育扇三角洲相。
Seismic inversion results indicate that the delta sandstone reservoirs occurred extensively in the 2nd and 3rd intervals of dongying formation , lower tertiary , and become poor only to the western margin of the survey area . in contrast , the fan delta sandstones in shahejie formation developed mainly in the area between fl and f2 faults , and turbidity sandstones locally in the rest of the survey area 储层预测结果表明，东二、三段储层除工区北部西侧外，普遍发育较好；而沙河街一、二段和沙三段储层主要集中在f1断层下盘的中台阶地区及f2断层下盘，其它地区发育一些规模不等的浊积扇。
